Document and Entity Information Document Information [Table] Document Information [Line Items] Document Type Document Quarterly Report Document Period End Date Document Transition Report Entity File Number Entity Registrant Name Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Address, Address Line One Entity Address, City or Town Entity Address, State or Province Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Unaudited Consolidated Balance Sheets Statement [Table] Statement [Line Items] Statement Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and cash equivalents Fair value of cash and cash equivalents Cash and cash equivalents Debt Securities, Available-for-sale, Current Corporate investments Accounts Receivable, Net, Current Accounts receivable, net Capitalized Contract Cost, Net, Current Deferred contract costs Prepaid Expense and Other Assets, Current Prepaid expenses and other Represents the sum of the carrying amounts as of the balance sheet date of all assets, before funds held for clients, that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets Current before Funds Held for Clients Total current assets before funds held for clients Funds Held for Clients Funds held for clients Assets, Current Total current assets Capitalized Computer Software, Net Capitalized internal-use software, net Capitalized internal-use software, net Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Operating Lease, Right-of-Use Asset Operating lease right-of-use assets Finite-Lived Intangible Assets, Net Intangible assets, net Intangible assets, net Goodwill Balance at the end of the period Balance at the beginning of the period Goodwill Capitalized Contract Cost, Net, Noncurrent Long-term deferred contract costs Prepaid Expense and Other Assets, Noncurrent Long-term prepaid expenses and other Deferred Income Tax Assets, Net Deferred income tax assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued expenses Total accrued expenses Represents the amount of total current liabilities, before client fund obligations, incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Liabilities Current before Client Fund Obligations Total current liabilities before client fund obligations Represents the amount of obligations related to client funds that will be paid within the next twelve months or within one business cycle, if longer. Client Fund Obligations Current Client fund obligations Liabilities, Current Total current liabilities Long-term Debt Long-term debt Operating Lease, Liability, Noncurrent Long-term operating lease liabilities Other Liabilities, Noncurrent Other long-term liabilities Deferred Income Tax Liabilities, Net Deferred income tax liabilities Liabilities Total liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred stock, $0.001 par value, 5,000 authorized, no shares issued and outstanding at June 30, 2020 and December 31, 2020 Common Stock, Value, Issued Common stock, $0.001 par value, 155,000 shares authorized at June 30, 2020 and December 31, 2020; 53,792 shares issued and outstanding at June 30, 2020 and 54,370 shares issued and outstanding at December 31, 2020 Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Preferred Stock, Par or Stated Value Per Share Preferred Stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred Stock, shares authorized Preferred Stock, Shares Issued Preferred Stock, shares issued Preferred Stock, Shares Outstanding Preferred Stock, shares outstanding Common Stock, Par or Stated Value Per Share Common Stock, par value (in dollars per share) Common Stock, Shares Authorized Common Stock, shares authorized Common Stock, Shares, Issued Common Stock, shares issued Common Stock, Shares, Outstanding Balance (in shares) Balance (in shares) Common Stock, shares outstanding Unaudited Consolidated Statements of Operations and Comprehensive Income Revenues [Abstract] Revenues: Revenue from Contract with Customer, Excluding Assessed Tax Recurring and other revenue Revenue Not from Contract with Customer Interest income on funds held for clients Revenues Total revenues Cost of Services Cost of revenues Gross Profit Gross profit Operating Expenses [Abstract] Operating expenses: Selling and Marketing Expense Sales and marketing Research and Development Expense Research and development General and Administrative Expense General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Operating income Nonoperating Income (Expense) Other income (expense) Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before income taxes Income Tax Expense (Benefit) Income tax expense (benefit) Net Income (Loss) Attributable to Parent Net income Net income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive loss, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive loss, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Earnings Per Share, Basic and Diluted [Abstract] Net income per share: Earnings Per Share, Basic Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Weighted-average shares used in computing net loss per share attributable to common stockholders: Weighted-average shares used in computing net income per share: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Diluted (in shares) Unaudited Consolidated Statement of Changes in Stockholders' Equity Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid In Capital [Member] Additional Paid-in Capital Retained Earnings [Member] Retained Earnings Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation Stock Issued During Period, Value, Stock Options Exercised Stock options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Options exercised Stock options exercised (in shares) Represents the aggregate change in value due to restricted stock units that vested during the period. Adjustments to Additional Paid in Capital Restricted Stock Vesting Issuance of common stock upon vesting of restricted stock units Represents the number of shares of stock related to restricted stock units that vested during the period. Stock Issued During Period Shares Restricted Stock Units Vesting Issuance of common stock upon vesting of restricted stock units (in shares) Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of common stock under employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Number of shares issued Issuance of common stock under employee stock purchase plan (in shares) Represents the aggregate change in value due to net settlement of taxes and/or exercise price of options exercised and/or RSUs vested during the period. Net settlement for taxes and/or exercise price related to equity awards Net settlement for taxes and/or exercise price related to equity awards Number of shares utilized in net settlement of taxes and/or exercise price of options exercised and/or RSUs vested during the period. Net settlement for taxes and/or exercise price related to equity awards (in shares) Net settlement for taxes and/or exercise price related to equity awards (in shares) Shares withheld in settlement of taxes and/or exercise price Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized losses on securities, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Currency translation adjustments Unaudited Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities: Net income Net income Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Share-based Compensation Stock-based compensation expense Depreciation, Depletion and Amortization Depreciation and amortization expense Deferred Income Tax Expense (Benefit) Deferred income tax benefit Provision for Doubtful Accounts Provision for credit losses Charged to expense Accretion (Amortization) of Discounts and Premiums, Investments Net accretion of discounts and amortization of premiums on available-for-sale securities Amortization of Debt Issuance Costs Amortization of debt issuance costs Other Noncash Expense Other Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Accounts receivable The increase (decrease) in the amount of capitalized contract costs due to netting additions and amortization during the reporting period. Increase Decrease In Capitalized Contract Cost Deferred contract costs Increase (Decrease) in Prepaid Expense Prepaid expenses and other Increase (Decrease) in Accounts Payable, Trade Accounts payable The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid and in liabilities classified as other. Increase Decrease In Accrued Liabilities And Other Liabilities Accrued expenses and other Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities: Payments to Acquire Debt Securities, Available-for-sale Purchases of available-for-sale securities and other Proceeds from Sale and Maturity of Available-for-sale Securities Proceeds from sales and maturities of available-for-sale securities Payments to Develop Software Capitalized internal-use software costs Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Acquisition of business, net of cash and funds held for clients' cash and cash equivalents Acquisition of business, net of cash acquired Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Represents the amount of net increase (decrease) in client funds obligation during the period. Increase (Decrease) in Client Funds Obligation Net change in client fund obligations Proceeds from Lines of Credit Outstanding borrowings Borrowings under credit facility Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options Proceeds from employee stock purchase plan Taxes paid related to net share settlement of equity awards Taxes paid related to net share settlement of equity awards Payments of Debt Issuance Costs Payment of debt issuance costs Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net change in cash, cash equivalents and funds held for clients' cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and funds held for clients' cash and cash equivalents-end of period Cash, cash equivalents and funds held for clients' cash and cash equivalents-beginning of period Noncash Investing and Financing Items [Abstract] Supplemental Disclosure of Non-Cash Investing and Financing Activities Noncash or Part Noncash Acquisition, Value of Liabilities Assumed Liabilities assumed for acquisition Supplemental Cash Flow Information [Abstract] Supplemental Disclosure of Cash Flow Information Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest Income Taxes Paid, Net Cash paid (refunds received) for income taxes No definition available Reconciliation of cash, cash equivalents and funds held for clients' cash and cash equivalents to the Unaudited Consolidated Balance Sheets The amount of funds held for clients that are cash and cash equivalents. Funds held for clients' cash and cash equivalents Funds held for clients' cash and cash equivalents Fair value of funds held for clients' cash and cash equivalents Amount of cash and cash equivalents and funds held for clients cash and cash equivalents. Cash, cash equivalents and funds held for clients' cash and cash equivalent Total cash, cash equivalents and funds held for clients' cash and cash equivalents Organization and Description of Business Nature of Operations [Text Block] Organization and Description of Business Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Revenue Revenue from Contract with Customer [Text Block] Revenue Business Combinations Business Combination Disclosure [Text Block] Business Combinations Balance Sheet Information Supplemental Balance Sheet Disclosures [Text Block] Balance Sheet Information n/a Corporate Investments and Funds Held for Clients Schedule of funds held for clients and corporate investments, including client cash and cash equivalents and available-for-sale securities. Schedule Of Funds Held For Clients And Corporate Investments [Table] Schedule of Corporate Investments and Funds Held for Clients Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Funds Held For Clients And Corporate Investments [Line Items] Corporate Investments and Funds Held for Clients The entire disclosure for funds held for clients and corporate investments. Funds Held For Clients And Corporate Investments [Text Block] Corporate Investments and Funds Held for Clients Fair Value Measurement Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair value measurement Fair Value Disclosures [Text Block] Fair Value Measurement Debt Debt Disclosure [Text Block] Debt Stock-Based Compensation Defined Contribution Plan [Table] Defined Contribution Plan Disclosure [Line Items] Defined Contribution Plan Disclosure Compensation and Employee Benefit Plans [Text Block] Stock-Based Compensation Litigation The entire disclosure for litigation. Litigation Disclosure [Text Block] Litigation Income Taxes Income Tax Disclosure [Text Block] Income Taxes Net Income Per Share Schedule reflecting the calculation of earnings per share. Schedule Of Earnings Per Share [Table] Earnings Per Share [Text Block] Net Income Per Share Disclosure of accounting policy for basis of presentation describing the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS), consolidation including the principles it follows in consolidating or combining the separate financial statements, and the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles. Basis of Presentation Consolidation and Use of Estimates [Policies Text Block] Basis of Presentation, Consolidation and Use of Estimates Disclosure of accounting policy for interim unaudited consolidated financial information of the entity. Interim Unaudited Consolidated Financial Information [Policy Text Block] Interim Unaudited Consolidated Financial Information Income Tax, Policy [Policy Text Block] Income Taxes Disclosure of accounting policy pertaining to new accounting pronouncements recently adopted, including the impact of such adoption. New Accounting Pronouncements Recently Adopted Policy [Policy Text Block] Recently Adopted Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Recently Issued Accounting Standards Disaggregation of Revenue [Table Text Block] Schedule of disaggregation of revenue Contract with Customer, Asset and Liability [Table Text Block] Schedule of changes in deferred revenue related to nonrefundable upfront fees Capitalized Contract Cost [Table Text Block] Schedule of deferred contract costs and the related amortization expense Accounts Receivable, Allowance for Credit Loss [Table Text Block] Schedule of activity in the allowance for credit losses related to accounts receivable Tabular disclosure of information pertaining to capitalized internal-use software and accumulated amortization. Schedule of Capitalized Software and Accumulated Amortization [Table Text Block] Schedule of capitalized internal-use software and accumulated amortization Property, Plant and Equipment [Table Text Block] Schedule of property and equipment, net Schedule of Goodwill [Table Text Block] Schedule of changes in goodwill Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Schedule of amortizable intangible assets and estimated useful lives Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of future amortization expense for acquired intangible assets Schedule of Accrued Liabilities [Table Text Block] Schedule of components of accrued expenses Investment [Table Text Block] Schedule of corporate investments and funds held for clients Tabular disclosure of investments by classification. Investment By Classification [Table Text Block] Schedule of the classification of investments Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of fair value level for cash and cash equivalents and available-for-sale securities measured on a recurring basis Tabular disclosure of the change in the number of shares available for grant under the company's share-based compensation plans that may be presented in a single table for outstanding awards. Schedule Of Share Based Compensation Activities [Table Text Block] Schedule of changes in the number of shares available for grant under equity incentive plans Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock-based compensation expense related to stock options, restricted stock units, market share units and the Employee Stock Purchase Plan Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of stock option activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of restricted stock unit activity Tabular disclosure of the significant assumptions used during the year to estimate the fair value of market share units. Schedule Of Share Based Payment Award Market Share Unit Valuation Assumptions [Table Text Block] Summary of the assumptions used for estimating the grant date fair value of MSUs Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of calculation of basic and diluted net income per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Summary of anti-dilutive securities Disaggregation of Revenue [Table] Product and Service [Axis] Products And Services [Domain] Product and Service [Domain] Information pertaining to the revenue from non-recurring fees. Nonrecurring Fees [Member] Implementation services and other Disaggregation of Revenue [Line Items] Revenue Period that notice must be given by client to cancel an agreement for services. Cancellation Notice Period Period of notice to cancel by client Period over which nonrefundable upfront implementation fees are amortized. Amortization Period for Non refundable Implementation Fees Amortization period of nonrefundable upfront implementation fees Period of arrangements that are not cancellable by client notice. Period Of Term Arrangement Period of term arrangements not cancellable by client n/a Contracts With Customers [Abstract] Disaggregation of revenue Change in Contract with Customer, Liability [Abstract] Changes in deferred revenue related to nonrefundable upfront fees Contract with Customer, Liability Balance at end of the period Balance at beginning of the period Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due. Contract with Customer, Liability, Increase (Decrease) Deferral of revenue Contract with Customer, Liability, Revenue Recognized Revenue recognized The amount of nonrefundable upfront fees deferred that is expected to be recognized as revenue in the remainder of the fiscal year. Contract With Customer Revenue Deferred To Be Recognized Remainder Of Fiscal Year Deferred revenue from nonrefundable upfront fees expected to be recognized in fiscal 2021 The amount of nonrefundable upfront fees deferred that is expected to be recognized as revenue in the second fiscal year following the latest fiscal year. Contract With Customer Revenue Deferred To Be Recognized In Year Two Deferred revenue from nonrefundable upfront fees expected to be recognized in fiscal 2022 The amount of nonrefundable upfront fees deferred that is expected to be recognized as revenue in the third year following the latest fiscal year and beyond. Contract With Customer Revenue Deferred To Be Recognized In Year Three And Thereafter Deferred revenue from nonrefundable upfront fees expected to be recognized in fiscal 2023 and thereafter Capitalized Contract Cost, Net [Abstract] Deferred contract costs Capitalized Contract Cost, Amortization Period Amortization period of capitalized contract costs Capitalized Contract Cost, Net Ending Balance Beginning Balance Amount of capitalized contract costs added during the period. Capitalized Contract Cost Additions Capitalized Costs Capitalized Contract Cost, Amortization Amortization Revenue, Practical Expedient [Abstract] Remaining Performance Obligations Revenue, Remaining Performance Obligation, Amount Minimum value of unsatisfied performance obligations on term-based contracts Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Remaining performance obligation period Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Business Combinations Business Combination, Consideration Transferred Purchase price consideration Finite-Lived Intangible Assets, Gross Intangible assets, gross Intangible assets Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Total purchase price Property, Plant and Equipment [Table] Allowance for Doubtful Accounts Receivable [Roll Forward] Activity in the allowance for credit losses Allowance for Doubtful Accounts Receivable Balance at the end of the period Balance at the beginning of the period Allowance for Doubtful Accounts Receivable, Write-offs Write-offs Capitalized Computer Software, Net [Abstract] Capitalized internal-use software and accumulated amortization Capitalized Computer Software, Gross Capitalized internal-use software Capitalized Computer Software, Accumulated Amortization Accumulated amortization Capitalized Computer Software, Amortization Amortization of capitalized internal-use software Property, Plant and Equipment, Net, by Type [Abstract] Property and equipment, net Property, Plant and Equipment, Gross Property and equipment, gross Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated depreciation Depreciation Depreciation expense Changes in goodwill Goodwill, Acquired During Period Additions attributable to current period acquisition Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Acquired Finite-Lived Intangible Assets [Line Items] Intangible Assets Finite-Lived Intangible Assets, Net [Abstract] Amortizable intangible assets Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Useful life Amortization of Intangible Assets Amortization expense for acquired intangible assets Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Future amortization expense for acquired intangible assets Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Remainder of fiscal 2021 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Fiscal 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Two Fiscal 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Three Fiscal 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Four Fiscal 2025 Finite-Lived Intangible Assets, Amortization Expense, after Year Five Thereafter Accrued Liabilities, Current [Abstract] Components of accrued expenses Employee-related Liabilities, Current Accrued payroll and personnel costs Operating Lease, Liability, Current Operating lease liabilities Deferred revenue Other Accrued Liabilities, Current Other Financial Instrument [Axis] Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Major Types of Debt and Equity Securities [Domain] Commercial Paper Not Included With Cash And Cash Equivalents [Member] Commercial paper Corporate Debt Securities [Member] Corporate bonds Asset Backed Securities [Member] Asset-backed securities U S Treasury Securities [Member] U.S. treasury securities Represents corporate investments. Corporate Investments [Member] Corporate investments Represents funds held for clients. Funds Held For Clients [Member] Funds held for clients Amortized cost of cash and cash equivalents. Cash and Cash Equivalents, Amortized Cost Amortized cost of cash and cash equivalents Amortized cost of funds held for clients' cash and cash equivalents. Funds Held For Clients Cash And Cash Equivalents Amortized Cost Amortized cost of funds held for clients' cash and cash equivalents Available-for-sale Debt Securities, Amortized Cost Basis [Abstract] Available-for-sale securities Available-for-sale Debt Securities, Amortized Cost Basis Amortized cost Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Gross unrealized gains Available-for-sale Securities, Debt Securities Fair value Total available-for-sale securities This item represents the cost of investments, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Investments Amortized Cost Total investments at amortized cost Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments. Investments Accumulated Gross Unrealized Gain Before Tax Total investments gross unrealized gain Investments Total investments at fair value Amount of investments that are classified as long-term prepaid expenses and other on the consolidated balance sheets. Investments Classified As Long Term Prepaid Expenses And Other Long-term prepaid expenses and other Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Available-for-sale securities Debt Securities, Available-for-sale, Unrealized Loss Position Available-for-sale securities in an unrealized loss position Debt Securities, Available-for-sale, Realized Gain (Loss), Excluding Other-than-temporary Impairment Gross realized gains and losses on the sale of available-for-sale securities Other than Temporary Impairment Losses, Investments Credit impairment losses Available-for-sale Securities [Abstract] Available-for-sale securities: Line of Credit Facility [Table] Line of Credit Facility [Line Items] Debt Long-term Debt, Term Term of credit agreement Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity The aggregate borrowing capacity under the credit facility, consisting of the maximum borrowing capacity plus the contingent increase, if any one or more of the existing banks or new banks agree to provide such increased commitment amount. Line of Credit Facility Contingent Increase, Aggregate Maximum Borrowing Capacity Maximum borrowing capacity, subject to additional lender commitments and satisfaction of other requirements Debt Instrument, Basis Spread on Variable Rate Margin on base rate Represents the ratio of consolidated total debt to consolidated adjusted earnings before, interest, taxes, depreciation and amortization allowed under the terms of the senior credit facilities' covenants. Credit Facility Covenant Consolidated Leverage Ratio Net total leverage ratio Represents the ratio of Senior debt to adjusted earnings before, interest, taxes, depreciation and amortization allowed under the terms of the senior credit facilities' covenants. Credit Facility, Covenant Senior Secured Leverage Ratio Senior secured leverage ratio Represents the ratio of consolidated adjusted earnings before interest, taxes, depreciation and amortization to interest expense, which is necessary to be maintained under the terms of the senior credit facilities' covenants. Credit Facility Covenant Consolidated Interest Coverage Ratio Interest coverage ratio Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Represents the information pertaining to the Company's Equity Incentive Plans. Equity Incentive Plan [Member] Equity Incentive Plans Represents the information pertaining to 2008 Equity Incentive Plan. Equity Incentive Plan2008 [Member] 2008 Plan Represents the information pertaining to 2014 Equity Incentive Plan. Equity Incentive Plan2014 [Member] 2014 Plan Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Equity Incentive Plans Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Awards issued (in shares) Number of share instruments issuable under a share-based compensation plan. Share-based Compensation Arrangement by Share-based Payment Award, Shares Issuable Awards issuable (in shares) Represents the potential increase in the number of shares available for grant under the plan as a percentage of common stock issued and outstanding. Share Based Compensation Arrangement By Share Based Payment Award Percentage Number Of Additional Shares Available For Grant Potential number of additional shares available for grant each year (as a percent) Common Stock, Capital Shares Reserved for Future Issuance Number of shares of common stock reserved for issuance The number of shares (or other type of equity) originally authorized for awards under the equity-based compensation plan that are available for issuance upon the exercise of a stock option or vesting of a restricted stock unit. Share Based Compensation Arrangement By Share Based Payment Award Number Of Capital Shares Reserved For Issuance Number of shares allocated but not yet issued that are subject to outstanding options or awards Share Based Compensation Arrangement by Share Based Payment Award, Shares Available for Grant [Roll Forward] Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Balance at the end of the period Balance at the beginning of the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period RSUs granted RSUs granted The number of market share units grants made during the period. Share Based Compensation Arrangement By Share Based Payment Award Market Share Units MSUs granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Number of shares grants Options granted The number of shares under options and other equity-based compensation awards that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the equity incentive plan. Share Based Compensation Arrangement By Share Based Payment Award Forfeitures In Period Forfeitures The number of shares under an equity based payment plan that were removed from availability during the reporting period as forfeitures of shares or shares withheld in settlement of taxes and/or payment of exercise price. Share Based Compensation Arrangement By Share Based Payment Award Options Removed In Period Shares removed Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Deferred compensation arrangements (such as stock or unit options and share or unit awards) that are equity-based payments with individual employees that have been modified. The arrangements are generally based on employment contracts between the entity and one or more selected officers or key employees, and contain a promise by the employer to pay certain amounts or benefits at designated future dates, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Deferred Compensation Share Based Payments Modified Agreement [Member] Modified performance-based restricted stock unit awards Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Selling And Marketing Expense [Member] Sales and marketing Research And Development Expense [Member] Research and development General And Administrative Expense [Member] General and administrative Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Benefit Plans Allocated Share-based Compensation Expense Total stock-based compensation expense Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount Stock-based compensation expense capitalized in internal-use software costs Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Options Outstanding, Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Balance at the end of the period Balance at the beginning of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Options Outstanding, Weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Balance at the end of the period (in dollars per share) Balance at the beginning of the period (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Options exercised (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Options Additional Disclosures Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value at the end of the period Aggregate intrinsic value at the beginning of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted average remaining contractual term of options vested and exercisable at the end of the period (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Options vested and exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Options vested and exercisable at the end of the period, weighted average exercise price (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Options vested and exercisable intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Grant date fair value Weighted average grant date fair value of options granted (in dollars per share) Unrecognized Compensation Costs Not yet Recognized, Net of Estimated Forfeitures Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Total unrecognized compensation cost, net of estimated forfeitures related to unvested RSUs Total unrecognized compensation cost, net of estimated forfeitures related to unvested MSUs Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted average period to recognize unrecognized compensation cost Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] RSUs Outstanding Rollforward, Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number RSU balance at the end of the period RSU balance at the beginning of the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period RSUs vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period RSUs forfeited The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are expected to vest as of the balance sheet date. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Number RSUs expected to vest at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] RSUs Outstanding, Weighted average grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value RSU balance at the end of the period RSU balance at the beginning of the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value RSUs granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value RSUs vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value RSUs forfeited As of the balance sheet date, the weighted-average exercise price for outstanding non-vested equity-based payment instruments, excluding stock (or units) options, that are expected to vest. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected To Vest Weighted Average Grant Date Fair Value RSUs expected to vest at the end of the period The percentage of the target number of shares subject to each MSU eligible to vest. Percentage of Shares Target to Each Market Share Units Percentage of award shares eligible to vest Valuation assumptions: Valuation assumptions: Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected term (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Risk-free interest rate Effective Income Tax Rate Reconciliation, Percent Effective tax rate for the period (as a percent) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent U.S. federal income tax rate (as a percent) Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive securities excluded from diluted per share calculation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive securities excluded Earnings Per Share Reconciliation [Abstract] Basic and diluted net loss per share: Numerator for Calculation of Basic and Diluted Net Loss Per Share [Abstract] Numerator: Net Income (Loss) Available to Common Stockholders, Basic Net income Denominator for Calculation of Basic and Diluted Net Loss Per Share [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted-average shares used in computing net income per share: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Weighted-average effect of potentially dilutive shares: Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Employee stock options, restricted stock units, market share units and employee stock purchase plan shares Information pertaining to the revenue from recurring fees. Recurring Fees [Member] Recurring fees Range [Axis] Range [Member] Range [Domain] Maximum [Member] Maximum Capitalized Contract Cost [Axis] Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Information pertaining to the cost to obtain new contracts. Cost To Obtain New Contract [Member] Costs to obtain a new contract Information pertaining to the cost to fulfill a contract. Cost To Fulfill Contract [Member] Costs to fulfill a contract Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Business Acquisition [Axis] Business Acquisition Acquiree [Domain] Business Acquisition, Acquiree [Domain] Samepage Labs Inc Samepage Labs Inc [Member] Samepage Labs Inc Finite-Lived Intangible Assets by Major Class [Axis] Finite Lived Intangible Assets Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Represents information pertaining to proprietary technology. Proprietary Technology [Member] Proprietary technology Property, Plant and Equipment, Type [Axis] Property Plant And Equipment Type [Domain] Property, Plant and Equipment, Type [Domain] Office Equipment [Member] Office equipment Computer Equipment [Member] Computer equipment Furniture And Fixtures [Member] Furniture and fixtures Computer Software Intangible Asset [Member] Software Leasehold Improvements [Member] Leasehold improvements Represents information pertaining to time clocks rented by clients. Time Clocks Rented By Clients [Member] Time clocks rented by clients Cost Of Sales [Member] Cost of revenues Customer Relationships [Member] Client relationships Noncompete Agreements [Member] Non-solicitation agreements Trade Names [Member] Trade name Minimum [Member] Minimum Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification Out Of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification Out Of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income Fair Value, Hierarchy [Axis] Fair Value Measurements Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value Inputs Level1 [Member] Level 1 Fair Value Inputs Level2 [Member] Level 2 Fair Value Inputs Level3 [Member] Level 3 Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Five-year revolving credit agreement Long-term Debt, Type [Axis] Longterm Debt Type [Domain] Long-term Debt, Type [Domain] Secured Debt [Member] Senior secured debt Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate L I B O R [Member] LIBOR Base Rate [Member] Adjusted base rate Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Equity Award [Domain] Represents the information pertaining to an arrangement whereby an employee, director and non-employee third parties is entitled to receive in the future, subject to vesting and other restrictions, a number of shares in the entity at a specified price, as defined in the agreement. Employee And Nonemployee Stock Options [Member] Stock options Restricted Stock Units R S U [Member] Restricted stock units This member is pertaining to market share units. Market Share Units [Member] Market share units Antidilutive Securities [Axis] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] Employee Stock [Member] Employee stock purchase plan shares