TriNet (TNET) 10-Q 8 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	TNET
Entity Registrant Name	TRINET GROUP INC
Entity Central Index Key	937098
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		70,212,084

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$104,401	$134,341
Restricted cash	14,546	14,543
Prepaid income taxes	10,411	26,711
Prepaid expenses	10,001	9,336
Deferred loan costs and other current assets	4,570	4,271
Worksite employee related assets	922,619	1,635,136
Total current assets	1,066,548	1,824,338
Workers compensation receivable	54,130	31,905
Restricted cash and investments	73,964	69,447
Property and equipment, net	33,769	32,298
Goodwill	288,857	288,857
Other intangible assets, net	70,501	81,718
Deferred and other long term income taxes	21,586	7,184
Deferred loan costs and other assets	10,860	12,017
Total assets	1,620,215	2,347,764
Current liabilities:
Accounts payable	11,182	12,273
Accrued corporate wages	27,415	29,179
Deferred income taxes	65,713	65,713
Current portion of notes payable and borrowings under capital leases	20,305	20,738
Other current liabilities	10,784	10,303
Worksite employee related liabilities	915,985	1,630,555
Total current liabilities	1,051,384	1,768,761
Notes payable and borrowings under capital leases, less current portion	494,533	524,412
Workers compensation liabilities	82,748	75,448
Other liabilities	6,649	4,902
Total liabilities	1,635,314	2,373,523
Commitments and contingencies (Note 10)
Stockholders’ deficit:
Preferred stock, $.000025 per share stated value; 20,000,000 shares authorized; no shares issued and outstanding at March 31, 2015 and December 31, 2014
Common stock, $.000025 per share stated value; 750,000,000 shares authorized; 70,076,978 and 69,811,326 shares issued and outstanding at March 31, 2015 and December 31, 2014, respectively	462,655	442,682
Accumulated deficit	-477,341	-468,127
Accumulated other comprehensive loss	-413	-314
Total stockholders’ deficit	-15,099	-25,759
Total liabilities and stockholders’ deficit	$1,620,215	$2,347,764

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Preferred stock, per share stated value	$0.00	$0.00
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, per share stated value	$0.00	$0.00
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	70,076,978	69,811,326
Common stock, shares outstanding	70,076,978	69,811,326

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Professional service revenues	$97,016	$82,875
Insurance service revenues	528,562	426,037
Total revenues	625,578	508,912
Costs and operating expenses:
Insurance costs	483,203	381,157
Cost of providing services (exclusive of depreciation and amortization of intangible assets)	36,370	33,643
Sales and marketing	37,624	31,837
General and administrative	15,464	14,337
Systems development and programming costs	7,225	5,894
Amortization of intangible assets	11,217	13,549
Depreciation	3,434	3,218
Total costs and operating expenses	594,537	483,635
Operating income	31,041	25,277
Other income (expense):
Interest expense and bank fees	-5,204	-21,852
Other, net	450	103
Income before provision for income taxes	26,287	3,528
Provision for income taxes	10,476	1,988
Net income	$15,811	$1,540
Net income per share:
Basic	$0.23	$0.03
Diluted	$0.22	$0.03
Weighted average shares:
Basic	70,198,184	16,775,513
Diluted	73,350,219	19,397,777

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$15,811	$1,540
Other comprehensive income (loss), net of tax
Unrealized gains on investments	37	16
Foreign currency translation adjustments	-136	-42
Total other comprehensive loss, net of tax	-99	-26
Comprehensive income	$15,712	$1,514

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating activities
Net income	$15,811	$1,540
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,741	22,028
Deferred income taxes		1,412
Stock-based compensation	3,920	2,147
Excess tax benefit from equity incentive plan activity	-12,853	-1,753
Accretion of workers compensation and leases fair value adjustment	-88	-347
Changes in operating assets and liabilities:
Restricted cash	-4,520	-3,961
Prepaid expenses and other current assets	-2,181	-1,411
Workers compensation receivables	-22,100	3,379
Other assets	-13,259	4,033
Accounts payable	-1,352	2,078
Income tax payable/receivable	29,153	-3,789
Other current liabilities	-211	1,532
Other liabilities	9,110	4,869
Worksite employee related assets	712,517	108,637
Worksite employee related liabilities	-714,570	-110,057
Net cash provided by operating activities	14,118	30,337
Investing activities
Purchase of debt securities		-1,000
Purchase of property and equipment	-4,644	-5,064
Net cash used in investing activities	-4,644	-6,064
Financing activities
Proceeds from issuance of common stock, net of issuance costs		218,859
Proceeds from issuance of common stock on exercised options	3,199	494
Excess tax benefit from equity incentive plan activity	12,853	1,753
Repayment of notes payable	-30,125	-216,575
Repayments under capital leases	-180	-66
Repurchase of common stock	-25,025	-451
Net cash provided by (used in) financing activities	-39,278	4,014
Effect of exchange rate changes on cash and cash equivalents	-136	-42
Net increase (decrease) in cash and cash equivalents	-29,940	28,245
Cash and cash equivalents at beginning of period	134,341	94,356
Cash and cash equivalents at end of period	104,401	122,601
Supplemental disclosures of cash flow information
Cash paid for interest	-3,872	-9,093
Cash received (paid) for income taxes, net	4,357	-4,352
Supplemental schedule of noncash investing and financing activities
Payable for purchase of property and equipment	$1,034	$632

Description_of_Business_and_Si

Description of Business and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business and Significant Accounting Policies	NOTE 1. DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES
	Description of Business
	TriNet Group, Inc. (the Company or TriNet), a Delaware corporation incorporated in January 2000, provides a comprehensive human resources solution for small to medium-sized businesses. The Company’s solution includes payroll processing, human capital consulting, employment law compliance and employee benefits, including health insurance, retirement plans and workers compensation insurance.
	The Company provides its services through co-employment relationships with its customers, under which the Company and its customers each take responsibility for certain portions of the employer-employee relationship for worksite employees (WSEs). The Company is the employer of record for most administrative and regulatory purposes, including the following: (i) compensation through wages and salaries; (ii) employer payroll-related taxes payment; (iii) employee payroll-related taxes withholding and payment; (iv) employee benefit programs including health and life insurance, and others; and (v) workers compensation coverage.
	Segment Information
	The Company operates in one reportable segment in accordance with Accounting Standard Codification (ASC) 280 – Segment Reporting, issued by the Financial Accounting Standards Board (FASB). All of the Company’s service revenues are generated from external customers. Less than 1% of revenues is generated outside of the United States of America (U.S.). Substantially all of the Company’s long-lived assets are located in the U.S.
	Basis of Presentation
	The accompanying unaudited consolidated financial statements and footnotes thereto of the Company and its wholly owned subsidiaries have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, filed with the SEC on March 30, 2015. There have been no changes to the Company’s significant accounting policies described in the Annual Report that have had a material impact on our consolidated financial statements and related notes. All intercompany accounts and transactions have been eliminated in consolidation.
	The accompanying unaudited consolidated balance sheets present the current assets and current liabilities directly related to the processing of human resources transactions as WSE-related assets and WSE-related liabilities, respectively. WSE-related assets are comprised of cash and investments restricted for current workers compensation claim payments, payroll funds collected, accounts receivable, unbilled service revenues, and refundable or prepaid amounts related to the Company-sponsored workers compensation and health plan programs. WSE-related liabilities are comprised of customer prepayments, wages and payroll taxes accrued and payable, and liabilities related to the Company-sponsored workers compensation and health plan programs resulting from workers compensation case reserves, premium amounts due to providers for enrolled employees, and workers compensation and health reserves that are expected to be disbursed within the next 12 months.
	The unaudited interim financial statements have been prepared on the same basis as the annual financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments, necessary for fair presentation. The results of the three months ended March 31, 2015 are not necessarily indicative of the results to be expected for the year ending December 31, 2015.
	Seasonality
	Historically, the Company has experienced its highest monthly addition of WSEs, as well as its highest monthly levels of client attrition, in the month of January, primarily because clients that change their payroll service providers tend to do so at the beginning of a calendar year. In addition, the Company experiences higher levels of client attrition in connection with renewals of the health insurance it provides for its WSEs, in the event that such renewals result in increased premiums that it passes on to its clients. The Company has also historically experienced higher insurance claim volumes in the second and third quarters of a fiscal year than in the first and fourth quarters of a fiscal year, as WSEs typically access their health care providers more often in the second and third quarters of a fiscal year, which has negatively impacted the Company’s insurance costs in these quarters. These historical trends may change, and other seasonal trends may develop that make it more difficult for the Company to manage its business.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect certain reported amounts and disclosures. These estimates include, but are not limited to, allowances for accounts receivable, workers compensation related assets and liabilities, health plan assets and liabilities, recoverability of goodwill and other intangible assets, income taxes, stock-based compensation and other contingent liabilities. Such estimates are based on historical experience and on various other assumptions that Company management believes to be reasonable under the circumstances. Actual results could differ from those estimates.
	Recent Accounting Pronouncements
	In January 2015, the FASB issued Accounting Standards Update (ASU) 2015-01— Income Statement-Extraordinary and Unusual Items, as part of its initiative to reduce complexity in accounting standards (the Simplification Initiative). ASU 2015-01 became effective on January 9, 2015. The amendment eliminates from GAAP the concept of extraordinary items. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively or retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The Company adopted this guidance in 2014. The adoption did not have an effect on the consolidated financial statements.
	In November 2014, the FASB issued ASU 2014-17— Business Combinations, which provides an acquired entity with an option to apply pushdown accounting in its financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. ASU 2014-17 became effective on November 28, 2014. An acquired entity can make an election to apply the guidance to future change-in-control events or to its most recent change-in-control event. However, if the financial statements for the period in which the most recent change-in-control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The Company adopted this guidance in 2014. The adoption did not have an effect on the consolidated financial statements.
	In August 2014, the FASB issued ASU 2014-15—Presentation of Financial Statements — Going Concern (Subtopic 205-40), which addresses management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. Management’s evaluation should be based on relevant conditions and events that are known and reasonably knowable at the date that the financial statements are issued. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2016. Early adoption is permitted. The Company does not expect to early adopt this guidance and does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements.
	In June 2014, the FASB issued ASU 2014-12—Compensation - Stock Compensation, which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for annual reporting periods, and interim periods within those years, beginning after December 15, 2015. Early adoption is permitted. The amendments may be applied prospectively to all awards granted or modified after the effective date or retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented. The Company does not expect this guidance to have a material effect on its consolidated financial statements. The Company expects to adopt this guidance in 2016.
	In May 2014, the FASB issued ASU 2014-09—Revenue from Contracts with Customers, which will replace most existing revenue recognition guidance under GAAP. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard provides a five-step analysis of transactions to determine when and how revenue is recognized. ASU 2014-09 is effective for annual reporting periods, and interim periods within those years, beginning after December 15, 2016. Early adoption is not permitted. The amendments may be applied retrospectively or as a cumulative-effect adjustment as of the date of adoption. The Company expects to adopt this guidance in 2017. The Company has not yet selected a method of adoption and is currently evaluating the effect that the amendments will have on the consolidated financial statements.

Worksite_EmployeeRelated_Asset

Worksite Employee-Related Assets and Liabilities	3 Months Ended
	Mar. 31, 2015
Other Industries [Abstract]
Worksite Employee-Related Assets and Liabilities	NOTE 2. WORKSITE EMPLOYEE-RELATED ASSETS AND LIABILITIES
	The following schedule presents the components of the Company’s WSE-related assets and WSE-related liabilities (in thousands):
		March 31,		December 31,
		2015		2014
	Worksite employee-related assets:
	Restricted cash	$	78,763	$	64,890
	Restricted investment		2,441		4,555
	Payroll funds collected		502,306		1,336,994
	Unbilled revenue, net of advance collections of $59,877 and $113,190 at March 31, 2015		309,327		203,599
	and December 31, 2014, respectively
	Accounts receivable, net of allowance for doubtful accounts of $288 and $388 at		11,253		5,193
	March 31, 2015 and December 31, 2014, respectively
	Prepaid health plan expenses		5,527		4,932
	Refundable workers compensation premiums		5,385		7,975
	Prepaid workers compensation expenses		1,562		1,256
	Other payroll assets		6,055		5,742
	Total worksite employee-related assets	$	922,619	$	1,635,136
	Worksite employee-related liabilities:
	Unbilled wages accrual	$	345,955	$	292,906
	Payroll taxes payable		326,665		1,119,427
	Health benefits payable		105,235		104,220
	Customer prepayments		48,549		53,770
	Workers compensation payable		61,591		36,778
	Other payroll deductions		27,990		23,454
	Total worksite employee-related liabilities	$	915,985	$	1,630,555

Workers_Compensation

Workers Compensation	3 Months Ended
	Mar. 31, 2015
Insurance [Abstract]
Workers Compensation	NOTE 3. WORKERS COMPENSATION
	The Company has agreements with various insurance carriers to provide workers compensation insurance coverage for worksite employees. Insurance carriers are responsible for administrating and paying claims. The Company is responsible for reimbursing each carrier up to a deductible limit per occurrence.
	The following summarizes the activities in liability for unpaid claims and claims adjustment expenses (in thousands):
		Three months			Year ended
		ended March 31,			December 31,
		2015			2014
	Liability for unpaid claims and claims adjustment at beginning of period	$	92,406		$	58,610
	Incurred related to:
	Current year		19,865			61,669
	Prior years		2,736			(4,725	)
	Total incurred		22,601			56,944
	Paid related to:
	Current year		(5,947	)		(13,525	)
	Prior years		(3,312	)		(9,623	)
	Total paid		(9,259	)		(23,148	)
	Liability for unpaid claims and claims adjustment at end of period		105,748			92,406
	Other premiums and collateral liabilities		38,591			19,820
	Total workers compensation liabilities at end of period	$	144,339		$	112,226
	Current portion included in worksite employee-related liability		61,591			36,778
	Long term portion	$	82,748		$	75,448
	Under the terms of its agreements with its workers compensation insurance carriers, the Company collects and holds premiums in restricted accounts pending claims payments by the claims administrator. As of March 31, 2015 and December 31, 2014, such restricted amounts of $44.2 million and $36.5 million, respectively, are presented as restricted cash and restricted investment within WSE-related assets in the accompanying consolidated balance sheets. In addition at March 31, 2015 and December 31, 2014, $74.0 million and $69.4 million, respectively, are presented as restricted long-term investments.

Property_and_Equipment_Net

Property and Equipment, Net	3 Months Ended
	Mar. 31, 2015
Property Plant And Equipment [Abstract]
Property and Equipment, Net	NOTE 4. PROPERTY AND EQUIPMENT, NET
	Property and equipment, net, consist of the following (in thousands):
		March 31,			December 31,
		2015			2014
	Software	$	53,939		$	53,349
	Office equipment, including data processing equipment		18,458			18,550
	Leasehold improvements		9,341			7,092
	Furniture, fixtures, and equipment		6,507			6,450
	Projects in progress		8,508			6,786
			96,753			92,227
	Accumulated depreciation		(62,984	)		(59,929	)
	Property and equipment, net	$	33,769		$	32,298
	Software and furniture, fixtures, and equipment include amounts for assets under capital leases of $1.2 million and $1.4 million at March 31, 2015 and December 31, 2014, respectively. Accumulated depreciation of these assets was $0.9 million and $0.9 million at March 31, 2015 and December 31, 2014, respectively. Amortization of assets held under capital leases is included with depreciation expense in the accompanying consolidated statements of operations.
	Projects in progress consist primarily of software development costs. The Company capitalizes software development costs intended for internal use. The Company recognized depreciation expense for capitalized internally developed software of $1.1 million and $1.6 million for the three months ended March 31, 2015 and 2014, respectively. Accumulated depreciation for these assets was $30.5 million and $29.4 million at March 31, 2015 and December 31, 2014, respectively.

Marketable_Securities_and_Fair

Marketable Securities and Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Investments Debt And Equity Securities [Abstract]
Marketable Securities and Fair Value Measurements	NOTE 5. MARKETABLE SECURITIES AND FAIR VALUE MEASUREMENTS
	The Company’s noncurrent restricted cash and investments include $50.5 million of available-for-sale marketable securities and $23.5 million of cash collateral at March 31, 2015. The Company’s restricted investments within WSE-related assets include $0.1 million of available-for-sale marketable securities and $2.3 million of certificates of deposit as of March 31, 2015. The available-for-sale marketable securities as of March 31, 2015 and December 31, 2014 consist of the following (in thousands):
		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	March 31, 2015:
	U.S. treasuries	$	50,011	$	67	$	—		$	50,078
	Mutual funds		500		8		—			508
	Total investments	$	50,511	$	75	$	—		$	50,586
	December 31, 2014:
	U.S. treasuries	$	50,075	$	22	$	(15	)	$	50,082
	Mutual funds		500		6		—			506
	Total investments	$	50,575	$	28	$	(15	)	$	50,588
	There were no realized gains or losses for the three months ended March 31, 2015 and 2014. As of March 31, 2015 and December 31, 2014, the contractual maturities of the U.S. treasuries were two to three years.
	As of March 31, 2015, certain of the Company’s U.S. treasuries were in unrealized loss position, all for a period of less than 12 months. These unrealized losses are principally due to changes in interest rates and credit spreads. In analyzing an issuer’s financial condition, the Company considers whether the securities are issued by the federal government or its agencies, whether downgrades by bond rating agencies have occurred, and industry analysts’ reports. The fair value of these securities in an unrealized loss position represented 1.6% and 59% of the total fair value of all securities available for sale and their unrealized losses were de minimis as of March 31, 2015 and December 31, 2014. As the Company has the ability to hold debt securities until maturity, or for the foreseeable future as classified as available for sale, no decline was deemed to be other-than-temporary.
	Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability.
	As a basis for considering such assumptions, the Company uses a three-tier value hierarchy, which prioritizes the inputs used in measuring fair value as follows:
	·	Level I—observable inputs such as quoted prices in active markets
	·	Level II—inputs other than the quoted prices in active markets that are observable either directly or indirectly
	·	Level III—unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions
	This hierarchy requires the Company to use observable market data when available and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company measures its financial assets at fair value.
	The following table summarizes the Company’s financial assets measured at fair value on a recurring basis (in thousands):
		Total		Level I		Level II			Level III
		Fair Value
	March 31, 2015:
	Certificates of deposit	$	2,318	$	2,318	$	—		$	—
	U.S. treasuries		50,078		50,078		—			—
	Mutual funds		508		508		—			—
	Total	$	52,904	$	52,904	$	—		$	—
	December 31, 2014:
	Certificates of deposit	$	2,318	$	2,318	$	—		$	—
	U.S. treasuries		50,082		50,082		—			—
	Mutual funds		506		506		—			—
	Interest rate cap		1		-		1			—
	Total	$	52,907	$	52,906	$	1		$	—
	There were no transfers between Level I and Level II assets during the three months ended March 31, 2015 or the year ended December 31, 2014.
	As of March 31, 2015 and December 31, 2014, certificates of deposit consisted of certificates of deposit held by domestic financial institutions, which are presented as restricted investments within WSE-related assets in the accompanying consolidated balance sheets.
	The book value of the Company’s financial instruments not measured at fair value, including cash, restricted cash, WSE-related assets and liabilities, line of credit and accrued corporate wages, approximates fair value due to the relatively short maturity, cash repayments or market interest rates of such instruments. The fair value of such financial instruments, other than cash and restricted cash, is determined using the income approach based on the present value of estimated future cash flows. The fair value of all of these instruments would be categorized as Level II of the fair value hierarchy, with the exception of cash and cash equivalents, which would be categorized as Level I.
	At March 31, 2015 and December 31, 2014, the carrying value of our notes payable of $514.7 million and $544.9 million, respectively, approximated fair value. The estimated fair values of our notes payable are considered a Level II valuation in the hierarchy for fair value measurement and are based on a cash flow model discounted at market interest rates that considers the underlying risks of unsecured debt.

Notes_Payable_and_Borrowings_u

Notes Payable and Borrowings under Capital Leases	3 Months Ended
	Mar. 31, 2015
Line Of Credit Facility [Abstract]
Notes Payable and Borrowings under Capital Leases	NOTE 6. NOTES PAYABLE AND BORROWINGS UNDER CAPITAL LEASES
	The following schedule summarizes the components of the Company’s notes payable and borrowings under capital leases balances (in thousands):
		March 31,			December 31,
		2015			2014
	Notes payable under credit facility	$	514,740		$	544,875
	Capital leases		98			275
	Less current portion		(20,305	)		(20,738	)
		$	494,533		$	524,412
	In March 2014, the proceeds from the Company’s initial public offering (IPO) were used to fully repay its existing $190.0 million second lien credit facility, which resulted in a prepayment premium of $3.8 million, and to repay $25.0 million of its existing first lien tranche B-1 term loan. Additionally, the remaining balance of the loan fees associated with the second lien credit facility and a portion of the loan fees associated with the first lien credit facility were fully amortized in March 2014 for a charge of $5.0 million. In May 2014, the Company repaid $25.0 million of the first lien tranche B-1 term loan. As a result, a portion of the loan fees associated with the first lien credit facility was fully amortized in May 2014 for a charge of $0.5 million.
	On July 9, 2014, the Company amended and restated its first lien credit facility pursuant to an amended and restated first lien credit agreement (the Amended and Restated Credit Agreement). The Amended and Restated Credit Agreement provides for: (i) $375 million principal amount of tranche A term loans, (ii) $200 million principal amount of tranche B term loans, and (iii) a revolving credit facility of $75 million. The proceeds of the tranche A term loans were used to refinance in part the tranche B-2 term loans outstanding under the original first lien credit facility. The proceeds of the tranche B term loans were used to (i) refinance the remaining tranche B-2 term loans outstanding under the original first lien credit facility, (ii) refinance other amounts outstanding under the original first lien credit facility and (iii) pay fees and expenses related thereto. The revolving credit facility replaced the revolving credit facility under the original first lien credit facility.
	The tranche A term loans and the revolving credit facility will mature on July 9, 2019. The tranche B term loans will mature on July 9, 2017. Loans under the revolving credit facility are expected to be used for working capital and other general corporate purposes.
	The tranche A term loans and loans under the revolving credit facility bear interest, at the Company’s option, at a rate equal to either the LIBOR rate, plus an applicable margin equal to 2.75% per annum, or the prime lending rate, plus an applicable margin equal to 1.75% per annum. The applicable margins for the tranche A term loans and loans under the revolving credit facility are subject to reduction by 0.25% or 0.50%, or increase by 0.25%, based upon the Company’s total leverage ratio. The tranche B term loans bear interest, at the Company’s option, at a rate equal to either the LIBOR rate, plus an applicable margin equal to 2.75% per annum or the prime lending rate, plus an applicable margin equal to 1.75% per annum. The Company is required to pay a commitment fee of 0.50%, subject to decrease to 0.375% based on our total leverage ratio, on the daily unused amount of the commitments under the revolving credit facility, as well as fronting fees and other customary fees for letters of credit issued under the revolving credit facility.
	The Company is permitted to make voluntary prepayments at any time without payment of a premium. The Company is required to make mandatory prepayments of term loans (without payment of a premium) with (i) net cash proceeds from issuances of debt (other than certain permitted debt), (ii) net cash proceeds from certain non-ordinary course asset sales and casualty and condemnation proceeds (subject to reinvestment rights and other exceptions), and (iii) beginning with the fiscal year ending December 31, 2015, 50% of our excess cash flow (subject to decrease to (x) 25% if our total leverage ratio as of the last day of such fiscal year is less than 3.75 to 1.0 and equal to or greater than 3.00 to 1.0, and (y) 0% if the total leverage ratio as of the last day of such fiscal year is less than 3.00 to 1.0), provided that the Company may defer prepayments based on excess cash flow to the extent such payments would result the working capital being less than $10 million (after giving effect to such prepayments).
	The tranche A term loans will be paid in equal quarterly installments in an aggregate annual amount equal to: (i) beginning on December 31, 2014 to December 31, 2016, 5% of the original principal amount thereof, (ii) beginning on December 31, 2016 to December 31, 2018, 7.5% of the original principal amount thereof, and (iii) beginning on December 31, 2018 to June 30, 2019, 10% of the original principal amount thereof with any remaining balance payable on the final maturity date of the tranche A term loans. The tranche B term loans will be paid in equal quarterly installments in an aggregate annual amount equal to 1% of the original principal amount thereof, with any remaining balance payable on the final maturity date of the tranche B term loans.
	The $75.0 million revolving credit facility includes capacity for a $30.0 million letter of credit facility and a $10.0 million swingline facility. The total unused portion of the revolving credit facility was $59.5 million as of March 31, 2015. In connection with the Amended and Restated Credit Agreement, the Company incurred $11.1 million of debt issuance costs. The Company deferred $8.0 million of the costs, which are being amortized over the term of the credit facility.  The remaining $3.1 million of costs were recorded to interest expense and bank fees.  Additionally, the Company recorded a $9.0 million loss on extinguishment of debt to write-off deferred issuance costs associated with the original first lien credit facility, which was also recorded to interest expense and bank fees.  The remaining $6.1 million of loan fees associated with the previous facility that was deemed to be modified continues to be amortized over the revised remaining term of the Amended and Restated Credit Agreement.
	In March 2015, the Company repaid $25.0 million of the first lien tranche B-1 term loan. As a result, a portion of the loan fees associated with the first lien credit facility was fully amortized in March 2015 for a charge of $0.4 million.
	The Amended and Restated Credit Agreement contains customary representations and warranties and customary affirmative and negative covenants applicable to the Company and its subsidiaries, including, among other things, restrictions on indebtedness, liens, investments, mergers, dispositions, prepayment of other indebtedness, and dividends and other distributions. The Amended and Restated Credit Agreement also contains financial covenants that require the Company to maintain a minimum consolidated interest coverage ratio of at least 3.50 to 1.00, beginning with the fiscal quarter ending September 30, 2014, and a maximum total leverage ratio, currently at 5.00 to 1.00. The Company was in compliance with the restrictive covenants under the credit facilities at March 31, 2015. The credit facility is secured by substantially all of the Company’s assets and the assets of the borrower and of the subsidiary guarantors, other than specifically excluded assets.

Stockholders_Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Stockholders' Equity	NOTE 7: STOCKHOLDERS’ EQUITY
	Common Stock
	Upon closing of the IPO on March 31, 2014, the Company issued 15,000,000 shares of common stock at a public offering price of $16 per share, for an aggregate offering price of $240 million, resulting in net proceeds to the Company of $217.8 million, after deducting the underwriting discount of approximately $16.8 million and offering expenses of approximately $5.6 million.
	In February 2014, the Company issued 91,074 shares to a member of the Board of Directors at $10.98 per share, which was the then estimated fair market value, for an aggregate of $1 million in cash.
	Equity-Based Incentive Plans
	In 2000, the Company established the 2000 Equity Incentive Plan (the 2000 Plan), which provided for granting incentive stock options, nonstatutory stock options, bonus awards and restricted stock awards to eligible employees, directors, and consultants of the Company. In December 2009, the Board of Directors approved the 2009 Equity Incentive Plan (the 2009 Plan) as the successor to and continuation of the 2000 Plan. As of the 2009 Plan effective date, remaining shares available for issuance under the 2000 Plan were cancelled and became available for issuance under the 2009 Plan. No additional stock awards will be granted under the 2000 Plan. The 2009 Plan provides for the grant of the following awards to eligible employees, directors, and consultants: incentive stock options, nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance stock awards, performance cash awards, and other stock awards. Incentive stock options may only be granted to employees. Nonemployee directors are eligible to receive nonstatutory stock options automatically at designated intervals over their period of continuous service on the Board. The amended 2009 Plan provides that the number of shares reserved for issuance under the 2009 Plan will increase on January 1 of each year for a period of up to five years by 4.5% of the total number of shares of capital stock outstanding on December 31 of the preceding calendar year, which will begin on January 1, 2015 and continue through January 1, 2019. On January 1, 2015, 3,141,509 shares were automatically reserved for issuance under the amended 2009 Plan.
	The exercise price per share of all incentive stock options granted under the 2000 Plan and the 2009 Plan must be at least equal to the fair market value of the shares at the date of grant as determined by the Board of Directors. Options issued to recipients other than nonemployee directors generally vest over four years with a one year cliff and monthly thereafter, and have a maximum contractual term of 10 years. Incentive stock options granted at 110% of the fair market value to stockholders who have greater than 10% ownership have a maximum term of five years.
	The Company also has granted restricted stock units (RSUs) to members of the Board of Directors and certain executives. These RSUs represent rights to receive shares of the Company’s common stock on satisfaction of applicable vesting conditions. The fair value of RSUs is equal to the fair value of the Company’s common stock on the date of grant. The RSUs granted to the members of the Board of Directors vest a year from the grant date. The RSUs granted to employees vest at a rate of 1/16 of the total RSUs granted on the 15th day of the second month of each calendar quarter following the grant date.
	In March 2015, the Company granted performance-based restricted stock units (PSUs) to its executives intended to represent 33.3% of each executive’s annual long-term incentive compensation award value in fiscal 2015. These PSUs vest over three years based on the Company’s attainment of annual financial performance goals as well as the executive’s continued employment through each vesting date. The number of shares that ultimately vest each year will range from 0 to 200% of the annual target amount, based on the Company’s performance. Cumulative financial performance metrics and goals are established for these awards at the grant date and the tranche of each award related to that period’s performance goal is treated as a separate grant for accounting purposes. The financial performance metric established for the performance awards is cumulative annual growth rate in the Company’s net service revenues. These values are being recognized over the tranches’ 12-month, 24-month and 36-month service periods. The Company began recording stock-based compensation expense for these tranches in March 2015, when the financial performance goals were established.
	Equity incentive plan activity under the 2000 Plan and the 2009 Plan for the three months ended March 31, 2015 is summarized as follows:
	Equity Incentive Plan Activity	Shares Available for Grant
	Balance at December 31, 2014		2,708,524
	Authorized		3,141,509
	Granted		(1,178,751	)
	Forfeited		343,126
	Expired		—
	Balance at March 31, 2015		5,014,408
	The following table summarizes stock option activity under the Company’s equity-based plans for the three months ended March 31, 2015:
	Stock Options Activity	Number			Weighted			Weighted		Aggregate
		of Shares			Average			Average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual		(in thousands)
								Term
	Balance at December 31, 2014		6,892,810		$	6.13			8.22	$	173,338
	Granted		272,200			33.51
	Exercised		(990,821	)		3.34
	Forfeited		(342,626	)		6.45
	Expired		—			—
	Balance at March 31, 2015		5,831,563		$	7.87			8.15		159,577
	Exercisable at March 31, 2015		1,802,963		$	4.02			7.52		56,279
	Vested and expected to vest at March 31, 2015		5,509,233		$	7.51			8.12	$	152,709
	The weighted-average grant date fair value of stock options granted in each of the three months ended March 31, 2015 and March 31, 2014 was $13.55 and $6.18 per share, respectively. The total fair value of options vested for the three months ended March 31, 2015 and March 31, 2014 was $4.4 million and $3.4 million, respectively.
	The total intrinsic value of options exercised for the three months ended March 31, 2015 and March 31, 2014 was $30.2 million and $6.2 million, respectively. Cash received from options exercised during the three months ended March 31, 2015 and March 31, 2014 was $3.2 million and $0.5 million, respectively. The exercise price of all options granted was equal to the fair value of the common stock on the date of grant.
	As of March 31, 2015, unrecognized compensation expense, net of forfeitures, associated with nonvested options outstanding was $22.4 million and is expected to be recognized over a weighted-average period of 2.02 years.
	The following table summarizes RSUs activity under the Company’s equity-based plans for the three months ended March 31, 2015:
	Restricted Stock Unit Activity	Number of Units			Weighted-Average
					Grant Date
					Fair Value
	Nonvested at December 31, 2014		7,750		$	13.21
	Granted		733,265		$	33.49
	Vested		(750	)	$	13.21
	Forfeited		(500	)	$	33.51
	Nonvested at March 31, 2015		739,765		$	33.3
	The total grant date fair value of RSUs granted in the three months ended March 31, 2015 was $24.6 million.  The total grant date fair value of RSUs vested in the three months ended March 31, 2015 was de minimis. As of March 31, 2015, unrecognized compensation expense, net of forfeitures, associated with the nonvested RSUs outstanding was $23.9 million, and is expected to be recognized over a weighted-average period of 3.68 years.
	The following table summarizes PSUs activity under the Company’s equity-based plans for the three months ended March 31, 2015:
	Performance Based Restricted Stock Unit Activity				Weighted-Average
					Grant Date
		Number of Units			Fair Value
	Outstanding units at December 31, 2014		—		$	—
	Granted		173,286		$	33.51
	Units converted		—		$	—
	Forfeited		—		$	—
	Outstanding units at March 31, 2015		173,286		$	33.51
	The maximum total grant date fair value of PSUs granted in the three months ended March 31, 2015 was $5.8 million,  assuming maximum 200% performance target is met.  As of March 31, 2015, unrecognized compensation expense assuming a 100% performance target is met, net of forfeitures, was $2.5 million, and is expected to be recognized over a weighted-average period of 2.75 years.
	Employee Stock Purchase Plan
	The Company adopted the 2014 Employee Stock Purchase Plan (ESPP) in February 2014, which became effective on March 26, 2014. The ESPP was approved with a reserve of 1.1 million shares of common stock for future issuance under various terms provided for in the ESPP, which will automatically increase on January 1 of each year from 2015 through 2024 by the lesser of 1% of the total number of shares outstanding on December 31 of the preceding calendar year or 1,800,000 shares. On January 1, 2015, an additional 698,113 shares were automatically reserved for issuance under the ESPP. We commenced our first purchase period under the ESPP on March 26, 2014 with a purchase price equal to the lesser of 85% of the fair market value of the common stock on the offering date and 85% of the fair market value of the common stock on the applicable purchase date.  Offering periods are six months in duration and will end on or about May 15 and November 15 of each year, with the exception of the initial offering period which commenced on March 26, 2014 and that ended November 14, 2014. Employees may contribute a minimum of 1% and a maximum of 15% of their earnings.
	Stock Repurchases
	During the three months ended March 31, 2015, the Company repurchased 725,624 shares of outstanding common stock for $25.0 million. As of March 31, 2015, a total of approximately $5.0 million remained available for further repurchases of the Company’s common stock under the Company’s stock repurchase program.
	Stock-Based Compensation
	Stock-based compensation expense of $3.9 million and $2.1 million was recognized for the three months ended March 31, 2015 and 2014, respectively. Income tax benefit of $1.2 million and $0.6 million was recognized relating to stock-based compensation expense for the three months ended March 31, 2015 and 2014, respectively. The actual tax benefit realized from stock options exercised was $10.2 million and $2.4 million for the three months ended March 31, 2015 and 2014, respectively.
	The fair value of stock-based awards is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:
	Stock Option Assumptions	Three Months Ended March 31,
		2015			2014
	Expected term (in years)	6.08			6.05
Expected volatility		39	%		58	%
Risk-free interest rate		1.74	%		1.8	%
Expected dividend yield		0	%		0	%
ESPP Assumptions	Three Months Ended March 31,
	2015			2014
Expected term (in years)	0.5			n/a
Expected volatility		33	%	n/a
Risk-free interest rate		0.07	%	n/a
Expected dividend yield		0	%	n/a
Stock-based compensation expense for stock-based payment awards made to the Company’s employees pursuant to the equity plans was as follows (in thousands):
	Three Months Ended March 31,
	2015			2014
Cost of providing services	$	758		$	454
Sales and marketing		917			517
General and administrative		2,021			1,008
Systems development and programming costs		224			168
	$	3,920		$	2,147

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 8: EARNINGS PER SHARE
	Prior to its IPO, the Company’s basic and diluted earnings per share (EPS) were computed using the two-class method, an earnings allocation method that determines earnings per share for common stock and participating securities. Shares of convertible preferred stock are considered participating securities and are entitled to dividend, on a pro rata basis, upon redemption, as if these had been converted to common stock. The undistributed earnings are allocated between common stock and participating securities as if all earnings had been distributed during the period.
	Basic EPS is calculated by taking net income, less earnings available to participating securities, divided by the basic weighted average common stock outstanding.
	Diluted EPS is calculated using the more dilutive of the if-converted method and the two-class method. Because the preferred stock participates in dividends on a pro rata basis as if the shares had been converted, the diluted earnings per share are the same under both methods. The two-class method has been presented below.
	The following table sets forth the computation of the Company’s basic and diluted net income per share attributable to common stock (in thousands, except per share data):
		Three Months Ended March 31,
		2015		2014
	Numerator (basic)
	Net income	$	15,811	$	1,540
	Less net income allocated to participating securities		—		(1,065	)
	Net income attributable to common stock	$	15,811	$	475
	Denominator (basic)
	Weighted average shares of common stock outstanding		70,198		16,776
	Basic EPS	$	0.23	$	0.03
	Numerator (diluted)
	Net income	$	15,811	$	1,540
	Less net income allocated to participating securities		—		(1,016	)
	Net income attributable to common stock	$	15,811	$	524
	Denominator (diluted)
	Weighted average shares of common stock		70,198		16,776
	Dilutive effect of stock options and restricted stock units		3,152		2,622
	Weighted average shares of common stock outstanding		73,350		19,398
	Diluted EPS	$	0.22	$	0.03
	Common stock equivalents excluded from income per diluted share		522		1,511
	because of their anti-dilutive effect

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 9. INCOME TAXES
	The Company is subject to taxation in the United States and Canada. However, business is conducted primarily in the United States. The effective income tax rate differs from the statutory rate primarily due to state taxes, non-deductible stock-based compensation, and tax credits. The Company makes estimates and judgments about its future taxable income that are based on assumptions that are consistent with the Company’s plans and estimates. Should the actual amounts differ from these estimates, the amount of the valuation allowance could be materially affected.
	Income taxes are computed using the asset and liability method, under which deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to affect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. Changes in valuation allowances are reflected as a component of provision for income taxes.
	The Company’s effective income tax rate was 39.9% and 56.4% for the three months ended March 31, 2015 and 2014, respectively. The decrease is primarily due to a discrete benefit from disqualifying dispositions of previously non-deductible stock-based compensation as well as a discrete expense recorded in the three months ended March 31, 2014 related to a regulatory state tax change.
	The Company is subject to taxation under the laws of the U.S. and various state and local jurisdictions, as well as Canada. The Company is not subject to any material income tax examinations by U.S. federal or state tax authorities for tax years beginning prior to January 1, 2010.  The Company paid Notices of Proposed Assessments outstanding as of December 31, 2014 related to the disallowance of employment tax credits totaling $10.5 million in connection with the IRS examination of Gevity HR, Inc. and its subsidiaries, which was acquired by TriNet in June 2009.  The Company plans to exhaust all administrative efforts to resolve this matter, however, it is likely that the matter will ultimately be resolved through litigation.  With regard to these employment tax credits, the Company believes it is more likely than not that the Company will prevail.  Therefore, no reserve has been recognized related to this matter.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 10. COMMITMENTS AND CONTINGENCIES
	Lease Commitments
	The Company leases office facilities, including its headquarters and other facilities, and equipment under non-cancelable operating leases. The Company also leases certain software and furniture, fixtures, and equipment under capital leases. The lease agreements generally provide for rental payments on a graduated basis and for options to renew, which could increase future minimum lease payments if exercised. The Company recognizes rent expense on a straight-line basis over the lease period and accrues for rent expense incurred but not paid. Rent expense for the three months ended March 31, 2015 and 2014 was $3.1 million and $2.7 million, respectively.
	Operating Covenants
	To meet various states’ licensing requirements and maintain accreditation by Employer Services Assurance Corporation, the Company is subject to various minimum working capital and net worth requirements. As of March 31, 2015, the Company believes it has fully complied in all material respects with all applicable state regulations regarding minimum net worth, working capital and all other financial and legal requirements. Further, the Company has maintained positive working capital throughout the period covered by the financial statements.
	Contingencies
	The Company may from time to time become involved in various litigation matters arising in the ordinary course of business, including suits by its clients. The unfavorable resolution of any such matter could have a material effect on the Company’s consolidated financial position and results of operations.
	Due to the nature of the Company’s relationship with its WSEs, the Company could be subject to liability for federal and state law violations even if the Company does not participate in such violations. While the Company’s agreements with its clients contain indemnification provisions related to the conduct of its clients, the Company historically has not encountered situations requiring enforcement of these indemnification provisions.
	The Company has been named as a defendant in various class action lawsuits arising from the nature of our relationship with our WSEs. Management is currently unable to estimate a possible loss or range of loss for these class action lawsuits. However, at this stage of the lawsuits, management currently believes that none of the pending legal proceedings or claims is reasonably likely to have a material adverse effect on our financial position, results of operations or cash flows. Nevertheless, regardless of the outcome, litigation can have an adverse impact on us because of defense costs, diversion of management resources and other factors. In addition, if one or more of these legal matters were resolved against the Company in a way contrary to management’s expectations, our consolidated financial statements could be materially adversely affected.

Description_of_Business_and_Si1

Description of Business and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Segment Information	Segment Information
	The Company operates in one reportable segment in accordance with Accounting Standard Codification (ASC) 280 – Segment Reporting, issued by the Financial Accounting Standards Board (FASB). All of the Company’s service revenues are generated from external customers. Less than 1% of revenues is generated outside of the United States of America (U.S.). Substantially all of the Company’s long-lived assets are located in the U.S.
Basis of Presentation	Basis of Presentation
	The accompanying unaudited consolidated financial statements and footnotes thereto of the Company and its wholly owned subsidiaries have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014, filed with the SEC on March 30, 2015. There have been no changes to the Company’s significant accounting policies described in the Annual Report that have had a material impact on our consolidated financial statements and related notes. All intercompany accounts and transactions have been eliminated in consolidation.
	The accompanying unaudited consolidated balance sheets present the current assets and current liabilities directly related to the processing of human resources transactions as WSE-related assets and WSE-related liabilities, respectively. WSE-related assets are comprised of cash and investments restricted for current workers compensation claim payments, payroll funds collected, accounts receivable, unbilled service revenues, and refundable or prepaid amounts related to the Company-sponsored workers compensation and health plan programs. WSE-related liabilities are comprised of customer prepayments, wages and payroll taxes accrued and payable, and liabilities related to the Company-sponsored workers compensation and health plan programs resulting from workers compensation case reserves, premium amounts due to providers for enrolled employees, and workers compensation and health reserves that are expected to be disbursed within the next 12 months.
	The unaudited interim financial statements have been prepared on the same basis as the annual financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments, necessary for fair presentation. The results of the three months ended March 31, 2015 are not necessarily indicative of the results to be expected for the year ending December 31, 2015.
Use of Estimates	Seasonality
	Historically, the Company has experienced its highest monthly addition of WSEs, as well as its highest monthly levels of client attrition, in the month of January, primarily because clients that change their payroll service providers tend to do so at the beginning of a calendar year. In addition, the Company experiences higher levels of client attrition in connection with renewals of the health insurance it provides for its WSEs, in the event that such renewals result in increased premiums that it passes on to its clients. The Company has also historically experienced higher insurance claim volumes in the second and third quarters of a fiscal year than in the first and fourth quarters of a fiscal year, as WSEs typically access their health care providers more often in the second and third quarters of a fiscal year, which has negatively impacted the Company’s insurance costs in these quarters. These historical trends may change, and other seasonal trends may develop that make it more difficult for the Company to manage its business.
	Use of Estimates
	The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect certain reported amounts and disclosures. These estimates include, but are not limited to, allowances for accounts receivable, workers compensation related assets and liabilities, health plan assets and liabilities, recoverability of goodwill and other intangible assets, income taxes, stock-based compensation and other contingent liabilities. Such estimates are based on historical experience and on various other assumptions that Company management believes to be reasonable under the circumstances. Actual results could differ from those estimates.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In January 2015, the FASB issued Accounting Standards Update (ASU) 2015-01— Income Statement-Extraordinary and Unusual Items, as part of its initiative to reduce complexity in accounting standards (the Simplification Initiative). ASU 2015-01 became effective on January 9, 2015. The amendment eliminates from GAAP the concept of extraordinary items. The amendment is effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. A reporting entity may apply the amendments prospectively or retrospectively to all prior periods presented in the financial statements. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The Company adopted this guidance in 2014. The adoption did not have an effect on the consolidated financial statements.
	In November 2014, the FASB issued ASU 2014-17— Business Combinations, which provides an acquired entity with an option to apply pushdown accounting in its financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. ASU 2014-17 became effective on November 28, 2014. An acquired entity can make an election to apply the guidance to future change-in-control events or to its most recent change-in-control event. However, if the financial statements for the period in which the most recent change-in-control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The Company adopted this guidance in 2014. The adoption did not have an effect on the consolidated financial statements.
	In August 2014, the FASB issued ASU 2014-15—Presentation of Financial Statements — Going Concern (Subtopic 205-40), which addresses management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. Management’s evaluation should be based on relevant conditions and events that are known and reasonably knowable at the date that the financial statements are issued. The standard will be effective for the first interim period within annual reporting periods beginning after December 15, 2016. Early adoption is permitted. The Company does not expect to early adopt this guidance and does not believe that the adoption of this guidance will have a material impact on its consolidated financial statements.
	In June 2014, the FASB issued ASU 2014-12—Compensation - Stock Compensation, which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for annual reporting periods, and interim periods within those years, beginning after December 15, 2015. Early adoption is permitted. The amendments may be applied prospectively to all awards granted or modified after the effective date or retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented. The Company does not expect this guidance to have a material effect on its consolidated financial statements. The Company expects to adopt this guidance in 2016.
	In May 2014, the FASB issued ASU 2014-09—Revenue from Contracts with Customers, which will replace most existing revenue recognition guidance under GAAP. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard provides a five-step analysis of transactions to determine when and how revenue is recognized. ASU 2014-09 is effective for annual reporting periods, and interim periods within those years, beginning after December 15, 2016. Early adoption is not permitted. The amendments may be applied retrospectively or as a cumulative-effect adjustment as of the date of adoption. The Company expects to adopt this guidance in 2017. The Company has not yet selected a method of adoption and is currently evaluating the effect that the amendments will have on the consolidated financial statements.

Worksite_EmployeeRelated_Asset1

Worksite Employee-Related Assets and Liabilities (Tables)	3 Months Ended
	Mar. 31, 2015
Other Industries [Abstract]
Schedule of Components of the Company's WSE-Related Assets and WSE-Related Liabilities	The following schedule presents the components of the Company’s WSE-related assets and WSE-related liabilities (in thousands):
		March 31,		December 31,
		2015		2014
	Worksite employee-related assets:
	Restricted cash	$	78,763	$	64,890
	Restricted investment		2,441		4,555
	Payroll funds collected		502,306		1,336,994
	Unbilled revenue, net of advance collections of $59,877 and $113,190 at March 31, 2015		309,327		203,599
	and December 31, 2014, respectively
	Accounts receivable, net of allowance for doubtful accounts of $288 and $388 at		11,253		5,193
	March 31, 2015 and December 31, 2014, respectively
	Prepaid health plan expenses		5,527		4,932
	Refundable workers compensation premiums		5,385		7,975
	Prepaid workers compensation expenses		1,562		1,256
	Other payroll assets		6,055		5,742
	Total worksite employee-related assets	$	922,619	$	1,635,136
	Worksite employee-related liabilities:
	Unbilled wages accrual	$	345,955	$	292,906
	Payroll taxes payable		326,665		1,119,427
	Health benefits payable		105,235		104,220
	Customer prepayments		48,549		53,770
	Workers compensation payable		61,591		36,778
	Other payroll deductions		27,990		23,454
	Total worksite employee-related liabilities	$	915,985	$	1,630,555

Workers_Compensation_Tables

Workers Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Insurance [Abstract]
Summary of Activities in Liability for Unpaid Claims and Claims Adjustment Expenses	The following summarizes the activities in liability for unpaid claims and claims adjustment expenses (in thousands):
		Three months			Year ended
		ended March 31,			December 31,
		2015			2014
	Liability for unpaid claims and claims adjustment at beginning of period	$	92,406		$	58,610
	Incurred related to:
	Current year		19,865			61,669
	Prior years		2,736			(4,725	)
	Total incurred		22,601			56,944
	Paid related to:
	Current year		(5,947	)		(13,525	)
	Prior years		(3,312	)		(9,623	)
	Total paid		(9,259	)		(23,148	)
	Liability for unpaid claims and claims adjustment at end of period		105,748			92,406
	Other premiums and collateral liabilities		38,591			19,820
	Total workers compensation liabilities at end of period	$	144,339		$	112,226
	Current portion included in worksite employee-related liability		61,591			36,778
	Long term portion	$	82,748		$	75,448

Property_and_Equipment_Net_Tab

Property and Equipment, Net (Tables)	3 Months Ended
	Mar. 31, 2015
Property Plant And Equipment [Abstract]
Property and Equipment, Net	Property and equipment, net, consist of the following (in thousands):
		March 31,			December 31,
		2015			2014
	Software	$	53,939		$	53,349
	Office equipment, including data processing equipment		18,458			18,550
	Leasehold improvements		9,341			7,092
	Furniture, fixtures, and equipment		6,507			6,450
	Projects in progress		8,508			6,786
			96,753			92,227
	Accumulated depreciation		(62,984	)		(59,929	)
	Property and equipment, net	$	33,769		$	32,298

Marketable_Securities_and_Fair1

Marketable Securities and Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Investments Debt And Equity Securities [Abstract]
Summary of Available-for-Sale Marketable Securities	The available-for-sale marketable securities as of March 31, 2015 and December 31, 2014 consist of the following (in thousands):
		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	March 31, 2015:
	U.S. treasuries	$	50,011	$	67	$	—		$	50,078
	Mutual funds		500		8		—			508
	Total investments	$	50,511	$	75	$	—		$	50,586
	December 31, 2014:
	U.S. treasuries	$	50,075	$	22	$	(15	)	$	50,082
	Mutual funds		500		6		—			506
	Total investments	$	50,575	$	28	$	(15	)	$	50,588
Summary of Financial Assets Measured at Fair Value on Recurring Basis	The following table summarizes the Company’s financial assets measured at fair value on a recurring basis (in thousands):
		Total		Level I		Level II			Level III
		Fair Value
	March 31, 2015:
	Certificates of deposit	$	2,318	$	2,318	$	—		$	—
	U.S. treasuries		50,078		50,078		—			—
	Mutual funds		508		508		—			—
	Total	$	52,904	$	52,904	$	—		$	—
	December 31, 2014:
	Certificates of deposit	$	2,318	$	2,318	$	—		$	—
	U.S. treasuries		50,082		50,082		—			—
	Mutual funds		506		506		—			—
	Interest rate cap		1		-		1			—
	Total	$	52,907	$	52,906	$	1		$	—

Notes_Payable_and_Borrowings_u1

Notes Payable and Borrowings under Capital Leases (Tables)	3 Months Ended
	Mar. 31, 2015
Line Of Credit Facility [Abstract]
Components of Company's Notes Payable and Borrowings under Capital Leases Balances	The following schedule summarizes the components of the Company’s notes payable and borrowings under capital leases balances (in thousands):
		March 31,			December 31,
		2015			2014
	Notes payable under credit facility	$	514,740		$	544,875
	Capital leases		98			275
	Less current portion		(20,305	)		(20,738	)
		$	494,533		$	524,412

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Equity Incentive Plan Activity	Equity incentive plan activity under the 2000 Plan and the 2009 Plan for the three months ended March 31, 2015 is summarized as follows:
	Equity Incentive Plan Activity	Shares Available for Grant
	Balance at December 31, 2014		2,708,524
	Authorized		3,141,509
	Granted		(1,178,751	)
	Forfeited		343,126
	Expired		—
	Balance at March 31, 2015		5,014,408
Summary of Stock Option Activity under the Company's Equity-Based Plans	The following table summarizes stock option activity under the Company’s equity-based plans for the three months ended March 31, 2015:
	Stock Options Activity	Number			Weighted			Weighted		Aggregate
		of Shares			Average			Average		Intrinsic
					Exercise			Remaining		Value
					Price			Contractual		(in thousands)
								Term
	Balance at December 31, 2014		6,892,810		$	6.13			8.22	$	173,338
	Granted		272,200			33.51
	Exercised		(990,821	)		3.34
	Forfeited		(342,626	)		6.45
	Expired		—			—
	Balance at March 31, 2015		5,831,563		$	7.87			8.15		159,577
	Exercisable at March 31, 2015		1,802,963		$	4.02			7.52		56,279
	Vested and expected to vest at March 31, 2015		5,509,233		$	7.51			8.12	$	152,709
Summary of Restricted Stock Unit Activity under the Company's Equity-Based Plans	The following table summarizes RSUs activity under the Company’s equity-based plans for the three months ended March 31, 2015:
	Restricted Stock Unit Activity	Number of Units			Weighted-Average
					Grant Date
					Fair Value
	Nonvested at December 31, 2014		7,750		$	13.21
	Granted		733,265		$	33.49
	Vested		(750	)	$	13.21
	Forfeited		(500	)	$	33.51
	Nonvested at March 31, 2015		739,765		$	33.3
Summary of Performance Based Restricted Stock Unit Activity	The following table summarizes PSUs activity under the Company’s equity-based plans for the three months ended March 31, 2015:
	Performance Based Restricted Stock Unit Activity				Weighted-Average
					Grant Date
		Number of Units			Fair Value
	Outstanding units at December 31, 2014		—		$	—
	Granted		173,286		$	33.51
	Units converted		—		$	—
	Forfeited		—		$	—
	Outstanding units at March 31, 2015		173,286		$	33.51
Summary of Significant Assumptions Used to Estimate Fair Value of Stock Options under Black-Scholes Model	The fair value of stock-based awards is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:
	Stock Option Assumptions	Three Months Ended March 31,
		2015			2014
	Expected term (in years)	6.08			6.05
	Expected volatility		39	%		58	%
	Risk-free interest rate		1.74	%		1.8	%
	Expected dividend yield		0	%		0	%
Summary of Significant Assumptions Used to Estimate Fair Value of Employee Stock Purchase Plans under Black-Scholes Model	The fair value of stock-based awards is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions:
	ESPP Assumptions	Three Months Ended March 31,
		2015			2014
	Expected term (in years)	0.5			n/a
	Expected volatility		33	%	n/a
	Risk-free interest rate		0.07	%	n/a
	Expected dividend yield		0	%	n/a
Summary of Stock-based Compensation Expense	Stock-based compensation expense for stock-based payment awards made to the Company’s employees pursuant to the equity plans was as follows (in thousands):
		Three Months Ended March 31,
		2015			2014
	Cost of providing services	$	758		$	454
	Sales and marketing		917			517
	General and administrative		2,021			1,008
	Systems development and programming costs		224			168
		$	3,920		$	2,147

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share	The following table sets forth the computation of the Company’s basic and diluted net income per share attributable to common stock (in thousands, except per share data):
		Three Months Ended March 31,
		2015		2014
	Numerator (basic)
	Net income	$	15,811	$	1,540
	Less net income allocated to participating securities		—		(1,065	)
	Net income attributable to common stock	$	15,811	$	475
	Denominator (basic)
	Weighted average shares of common stock outstanding		70,198		16,776
	Basic EPS	$	0.23	$	0.03
	Numerator (diluted)
	Net income	$	15,811	$	1,540
	Less net income allocated to participating securities		—		(1,016	)
	Net income attributable to common stock	$	15,811	$	524
	Denominator (diluted)
	Weighted average shares of common stock		70,198		16,776
	Dilutive effect of stock options and restricted stock units		3,152		2,622
	Weighted average shares of common stock outstanding		73,350		19,398
	Diluted EPS	$	0.22	$	0.03
	Common stock equivalents excluded from income per diluted share		522		1,511
	because of their anti-dilutive effect

Description_of_Business_and_Si2

Description of Business and Significant Accounting Policies - Additional Information (Details)	3 Months Ended
	Mar. 31, 2015
	Segment
Summary Of Significant Accounting Policy [Line Items]
Number of reportable segments as result of acquisitions	1
Maximum | Geographic Concentration Risk | Sales Revenue, Net
Summary Of Significant Accounting Policy [Line Items]
Concentration risk, percentage	1.00%

Worksite_EmployeeRelated_Asset2

Worksite Employee-Related Assets and Liabilities - Schedule of Components of the Company's WSE-Related Assets and WSE-Related Liabilities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Worksite employee-related assets:
Restricted cash	$14,546	$14,543
Total worksite employee-related assets	922,619	1,635,136
Worksite employee-related liabilities:
Health benefits payable	27,415	29,179
Workers compensation payable	61,591	36,778
Total worksite employee-related liabilities	915,985	1,630,555
WSE
Worksite employee-related assets:
Restricted cash	78,763	64,890
Restricted investment	2,441	4,555
Payroll funds collected	502,306	1,336,994
Unbilled revenue, net of advance collections of $59,877 and $113,190 at March 31, 2015 and December 31, 2014, respectively	309,327	203,599
Accounts receivable, net of allowance for doubtful accounts of $288 and $388 at March 31, 2015 and December 31, 2014, respectively	11,253	5,193
Prepaid health plan expenses	5,527	4,932
Prepaid workers compensation expenses	1,562	1,256
Other payroll assets	6,055	5,742
Total worksite employee-related assets	922,619	1,635,136
Worksite employee-related liabilities:
Unbilled wages accrual	345,955	292,906
Payroll taxes payable	326,665	1,119,427
Health benefits payable	105,235	104,220
Customer prepayments	48,549	53,770
Workers compensation payable	61,591	36,778
Other payroll deductions	27,990	23,454
Total worksite employee-related liabilities	915,985	1,630,555
WSE | Workers Compensation
Worksite employee-related assets:
Refundable premiums	$5,385	$7,975

Worksite_EmployeeRelated_Asset3

Worksite Employee-Related Assets and Liabilities - Schedule of Components of the Company's WSE-Related Assets and WSE-Related Liabilities (Parenthetical) (Details) (WSE, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
WSE
Components Of Other Assets And Liabilities [Line Items]
Advance collection	$59,877	$113,190
Allowance for doubtful accounts	$288	$388

Workers_Compensation_Summary_o

Workers Compensation - Summary of Activities in Liability for Unpaid Claims and Claims Adjustment Expenses (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Insurance [Abstract]
Liability for unpaid claims and claims adjustment at beginning of period	$92,406	$58,610
Incurred related to:
Current year	19,865	61,669
Prior years	2,736	-4,725
Total incurred	22,601	56,944
Paid related to:
Current year	-5,947	-13,525
Prior years	-3,312	-9,623
Total paid	-9,259	-23,148
Liability for unpaid claims and claims adjustment at end of period	105,748	92,406
Other premiums and collateral liabilities	38,591	19,820
Total workers compensation liabilities at end of period	144,339	112,226
Current portion included in worksite employee-related liability	61,591	36,778
Workers compensation liabilities	$82,748	$75,448

Workers_Compensation_Additiona

Workers Compensation - Additional Information (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Liability For Claims And Claims Adjustment Expense [Line Items]
Long-term restricted cash and investments	$73,964,000	$69,447,000
WSE
Liability For Claims And Claims Adjustment Expense [Line Items]
Restricted cash and restricted investment	$44,200,000	$36,500,000

Property_and_Equipment_Net_Pro

Property and Equipment, Net - Property and Equipment, Net (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Property Plant And Equipment [Line Items]
Property and equipment, gross	$96,753	$92,227
Accumulated depreciation	-62,984	-59,929
Property and equipment, net	33,769	32,298
Software
Property Plant And Equipment [Line Items]
Property and equipment, gross	53,939	53,349
Office equipment, including data processing equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	18,458	18,550
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	9,341	7,092
Furniture, fixtures, and equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	6,507	6,450
Projects in progress
Property Plant And Equipment [Line Items]
Property and equipment, gross	$8,508	$6,786

Property_and_Equipment_Net_Add

Property and Equipment, Net - Additional Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Assets under capital leases	$1,200,000		$1,400,000
Accumulated depreciation - assets under capital leases	900,000		900,000
Depreciation	3,434,000	3,218,000
Accumulated depreciation	62,984,000		59,929,000
Internally developed software
Property Plant And Equipment [Line Items]
Depreciation	1,100,000	1,600,000
Accumulated depreciation	$30,500,000		$29,400,000

Marketable_Securities_and_Fair2

Marketable Securities and Fair Value Measurements - Additional Information (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Available-for-sale marketable securities	$50,500,000
Cash Collateral	23,500,000
Realized gains or losses	0	0
Percentage of total fair value of available for sale securities in unrealized loss position	1.60%		59.00%
Transfers between Level I and Level II assets	0		0
Level II
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Carrying value of notes payable	514,700,000		544,900,000
U.S. Treasuries | Minimum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Contractual maturities	2 years		2 years
U.S. Treasuries | Maximum
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Contractual maturities	3 years		3 years
WSE
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Available-for-sale marketable securities	100,000
Certificates of deposit	$2,300,000

Marketable_Securities_and_Fair3

Marketable Securities and Fair Value Measurements - Summary of Available-for-Sale Marketable Securities (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$50,511	$50,575
Gross Unrealized Gains	75	28
Gross Unrealized Losses		-15
Estimated Fair Value	50,586	50,588
U.S. Treasuries
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	50,011	50,075
Gross Unrealized Gains	67	22
Gross Unrealized Losses		-15
Estimated Fair Value	50,078	50,082
Mutual Funds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	500	500
Gross Unrealized Gains	8	6
Estimated Fair Value	$508	$506

Marketable_Securities_and_Fair4

Marketable Securities and Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	$52,904	$52,907
Level I
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	52,904	52,906
Level II
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value		1
Certificates of Deposit
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	2,318	2,318
Certificates of Deposit | Level I
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	2,318	2,318
U.S. Treasuries
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	50,078	50,082
U.S. Treasuries | Level I
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	50,078	50,082
Mutual Funds
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	508	506
Mutual Funds | Level I
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value	508	506
Interest Rate Cap
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value		1
Interest Rate Cap | Level II
Schedule Of Available For Sale Securities [Line Items]
Total Fair Value		$1

Notes_Payable_and_Borrowings_u2

Notes Payable and Borrowings under Capital Leases - Components of Company's Notes Payable and Borrowings under Capital Leases Balances (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Debt And Capital Lease Obligations [Abstract]
Notes payable under credit facility	$514,740	$544,875
Capital leases	98	275
Less current portion	-20,305	-20,738
Notes payable and borrowings under capital leases, less current portion	$494,533	$524,412

Notes_Payable_and_Borrowings_u3

Notes Payable and Borrowings under Capital Leases - Additional Information (Details) (USD $)	3 Months Ended		1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	31-May-14	Jul. 09, 2014
Debt Instrument [Line Items]
Interest and debt expense	$5,204,000	$21,852,000
Minimum
Debt Instrument [Line Items]
Debt instrument covenant interest coverage ratio	350.00%		350.00%
Maximum
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio	500.00%		500.00%
Tranche A Term Loans
Debt Instrument [Line Items]
Line of credit facility						375,000,000
Credit facility, maturity date	9-Jul-19
Increase (decrease) in interest rate	0.25%
Tranche A Term Loans | Installment Period 1
Debt Instrument [Line Items]
Frequency of payment	Quarterly
Beginning date of payment	31-Dec-14
Ending date of payment	31-Dec-16
Percentage of principal amount to be paid	5.00%
Tranche A Term Loans | Installment Period 2
Debt Instrument [Line Items]
Frequency of payment	Quarterly
Beginning date of payment	31-Dec-16
Ending date of payment	31-Dec-18
Percentage of principal amount to be paid	7.50%
Tranche A Term Loans | Installment Period 3
Debt Instrument [Line Items]
Frequency of payment	Quarterly
Beginning date of payment	31-Dec-18
Ending date of payment	30-Jun-19
Percentage of principal amount to be paid	10.00%
Tranche A Term Loans | Minimum
Debt Instrument [Line Items]
Increase (decrease) in interest rate	-0.25%
Tranche A Term Loans | Maximum
Debt Instrument [Line Items]
Increase (decrease) in interest rate	-0.50%
Tranche A Term Loans | LIBOR
Debt Instrument [Line Items]
Margin for term loans	2.75%
Tranche A Term Loans | Prime Lending Rate
Debt Instrument [Line Items]
Margin for term loans	1.75%
Tranche B Term Loans
Debt Instrument [Line Items]
Repayments of lines of credit			25,000,000
Lien of credit amount amortized			400,000
Line of credit facility						200,000,000
Credit facility, maturity date	9-Jul-17
Commitment fee percentage	0.50%
Percentage of prepayment in excess cash flow	50.00%
Frequency of payment	Quarterly
Percentage of principal amount to be paid	1.00%
Tranche B Term Loans | Prepayment Condition 1
Debt Instrument [Line Items]
Percentage of prepayment in excess cash flow	25.00%
Tranche B Term Loans | Prepayment Condition 2
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio	300.00%		300.00%
Tranche B Term Loans | Minimum
Debt Instrument [Line Items]
Commitment fee percentage	0.38%
Tranche B Term Loans | Minimum | Prepayment Condition 1
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio	300.00%		300.00%
Tranche B Term Loans | Maximum
Debt Instrument [Line Items]
Working capital	10,000,000		10,000,000
Tranche B Term Loans | Maximum | Prepayment Condition 1
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio	375.00%		375.00%
Tranche B Term Loans | Maximum | Prepayment Condition 2
Debt Instrument [Line Items]
Percentage of prepayment in excess cash flow	0.00%
Tranche B Term Loans | LIBOR
Debt Instrument [Line Items]
Margin for term loans	2.75%
Tranche B Term Loans | Prime Lending Rate
Debt Instrument [Line Items]
Margin for term loans	1.75%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility						75,000,000
Credit facility, maturity date	9-Jul-19
Second Lien Credit Facility
Debt Instrument [Line Items]
Repayments of lines of credit				190,000,000
Penalty paid				3,800,000
First Lien Credit Facility
Debt Instrument [Line Items]
Repayments of lines of credit				25,000,000	25,000,000
Lien of credit amount amortized	6,100,000			5,000,000	500,000
Unused portion of the revolving credit facility	59,500,000		59,500,000
Debt issuance costs	11,100,000
Deferred financing costs	8,000,000		8,000,000
Interest and debt expense	3,100,000
Gains (losses) on extinguishment of debt	9,000,000
First Lien Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Line of credit facility	30,000,000		30,000,000
First Lien Credit Facility | Swingline
Debt Instrument [Line Items]
Line of credit facility	$10,000,000		$10,000,000

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Details) (USD $)	3 Months Ended		1 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Feb. 28, 2014	Mar. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Plan description	Options issued to recipients other than nonemployee directors generally vest over four years with a one year cliff and monthly thereafter, and have a maximum contractual term of 10 years.
Stock options granted percentage of fair market value	110.00%
Term of stock options	4 years
Weighted-average grant-date fair value of stock options granted	$13.55	$6.18
Total fair value of options vested	$4,400,000	$3,400,000
Total intrinsic value of options exercised	30,200,000	6,200,000
Cash received from options exercised	3,200,000	500,000
Unrecognized compensation expense of options, net of forfeitures	22,400,000		22,400,000
Unrecognized compensation expense, expected to be recognized over a weighted-average period	2 years 7 days
Total grant date fair value of RSUs granted	24,600,000
Number of shares repurchased	725,624
Value of shares repurchased	25,000,000
Stock repurchase remained available for future repurchase, value	5,000,000		5,000,000
Stock-based compensation expense	3,920,000	2,147,000
Income tax benefit recognized relating to stock-based compensation expense	1,200,000	600,000
Actual tax benefit realized from stock options exercised	10,200,000	2,400,000
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Authorized shares reserved for issuance	698,113
Common stock for future issuance percentage increased	1.00%		1.00%
Restricted Stock Unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting percentage	6.25%
Unrecognized compensation expense, expected to be recognized over a weighted-average period	3 years 8 months 5 days
Unrecognized compensation expense of awards other than options, net of forfeitures	23,900,000		23,900,000
Performance-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation expense, expected to be recognized over a weighted-average period	2 years 9 months
Unrecognized compensation expense of awards other than options, net of forfeitures	2,500,000		2,500,000
Performance target assumption, unrecognized compensation expense	100.00%		100.00%
Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service period			12 months
Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service period			24 months
Performance-Based Restricted Stock Units | Share-based Compensation Award, Tranche Three
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Service period			36 months
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ownership percentage	10.00%		10.00%
Employees contribution on earnings	1.00%
Minimum | Performance-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting percentage			0.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contractual term	5 years
Employees contribution on earnings	15.00%
Maximum | Performance-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting percentage			200.00%
Total grant date fair value of RSUs granted	5,800,000
Performance target assumption, grant date fair value	200.00%
2009 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance expressed as a percentage of outstanding shares				4.50%
Authorized shares reserved for issuance	3,141,509
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares reserved for issuance	1,100,000		1,100,000
Common stock for future issuance number increase						1,800,000
Stock options granted percentage of fair market value on offering date	85.00%
Stock options granted percentage of fair market value on purchase date	85.00%
Employee stock purchase plan offering periods	Offering periods are six months in duration and will end on or about May 15 and November 15 of each year, with the exception of the initial offering period which commenced on March 26, 2014 and that ended November 14, 2014.
Member of Board of Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Initial public offering shares issued and sold				91,074
Public offering share price				10.98
Aggregate offering price				1,000,000
Member of Board of Directors | Restricted Stock Unit
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of stock options	1 year
Nonemployee Directors | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contractual term	10 years
Nonemployee Directors | 2009 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Plan description	The amended 2009 Plan provides that the number of shares reserved for issuance under the 2009 Plan will increase on January 1 of each year for a period of up to five years by 4.5% of the total number of shares of capital stock outstanding on December 31 of the preceding calendar year, which will begin on January 1, 2015 and continue through January 1, 2019.
Executives | Performance-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term of stock options			3 years
Percentage of long term incentive compensation award grants			33.30%
Initial Public Offering
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Initial public offering shares issued and sold					15,000,000
Public offering share price		$16			$16
Aggregate offering price					240,000,000
Proceeds from initial public offering net of underwriting discounts and offering expenses					217,800,000
Underwriting discounts					16,800,000
Offering expenses					$5,600,000

Stockholders_Equity_Summary_of

Stockholders' Equity - Summary of Equity Incentive Plan Activity (Details)	3 Months Ended
	Mar. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted	-272,200
Forfeited	342,626
Expired	0
Equity Incentive Plan Activity under 2000 Plan and 2009 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning Balance	2,708,524
Authorized shares reserved for issuance	3,141,509
Granted	-1,178,751
Forfeited	343,126
Expired	0
Ending Balance	5,014,408

Stockholders_Equity_Summary_of1

Stockholders' Equity - Summary of Stock Option Activity under the Company's Equity-Based Plans (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Shares, Beginning Balance	6,892,810
Number of Shares, Granted	272,200
Number of Shares, Exercised	-990,821
Number of Shares, Forfeited	-342,626
Number of Shares, Expired	0
Number of Shares, Ending Balance	5,831,563	6,892,810
Number of Shares, Exercisable, Ending Balance	1,802,963
Number of Shares, Vested and expected to vest, Ending Balance	5,509,233
Weighted-Average Exercise Price, Beginning Balance	$6.13
Weighted-Average Exercise Price, Granted	$33.51
Weighted-Average Exercise Price, Exercised	$3.34
Weighted-Average Exercise Price, Forfeited	$6.45
Weighted-Average Exercise Price, Ending Balance	$7.87	$6.13
Weighted-Average Exercise Price, Exercisable, Ending Balance	$4.02
Weighted-Average Exercise Price, Vested and expected to vest, Ending Balance	$7.51
Weighted-Average Remaining Contractual Term (Years)	8 years 1 month 24 days	8 years 2 months 19 days
Weighted-Average Remaining Contractual Term (Years), Exercisable	7 years 6 months 7 days
Weighted-Average Remaining Contractual Term (Years), Vested and Expected to vest	8 years 1 month 13 days
Aggregate Intrinsic Value, Beginning Balance	$173,338
Aggregate Intrinsic Value, Ending Balance	159,577	173,338
Aggregate Intrinsic Value, Exercisable, Ending Balance	56,279
Aggregate Intrinsic Value, Vested and expected to Vest, Ending Balance	$152,709

Stockholders_Equity_Summary_of2

Stockholders' Equity - Summary of Restricted Unit Activity under the Company's Equity-Based Plans (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Units, Beginning Balance	7,750
Number of Units, Granted	733,265
Number of Units, Vested	-750
Number of Units, Forfeited	-500
Number of Units, Ending Balance	739,765
Weighted Average Grant Date Fair Value, Beginning Balance	$13.21
Weighted Average Grant Date Fair Value, Granted	$33.49
Weighted Average Grant Date Fair Value, Vested	$13.21
Weighted Average Grant Date Fair Value, Forfeited	$33.51
Weighted Average Grant Date Fair Value, Ending Balance	$33.30

Stockholders_Equity_Summary_of3

Stockholders' Equity - Summary of Performance Based Restricted Stock Unit Activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Units, Beginning Balance	7,750
Number of Units, Granted	733,265
Number of Units, Forfeited	500
Number of Units, Ending Balance	739,765
Weighted Average Grant Date Fair Value, Beginning Balance	$13.21
Weighted Average Grant Date Fair Value, Granted	$33.49
Weighted Average Grant Date Fair Value, Forfeited	$33.51
Weighted Average Grant Date Fair Value, Ending Balance	$33.30
Performance-Based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Units, Beginning Balance	0
Number of Units, Granted	173,286
Number of Units, Converted	0
Number of Units, Forfeited	0
Number of Units, Ending Balance	173,286
Weighted Average Grant Date Fair Value, Granted	$33.51
Weighted Average Grant Date Fair Value, Ending Balance	$33.51

Stockholders_Equity_Summary_of4

Stockholders' Equity - Summary of Fair Value of Stock-based Awards Estimated using Black-Scholes Option-Pricing Model (Details)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 months
Expected volatility	33.00%
Risk-free interest rate	0.07%
Expected dividend yield	0.00%
Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 years 29 days	6 years 18 days
Expected volatility	39.00%	58.00%
Risk-free interest rate	1.74%	1.80%
Expected dividend yield	0.00%	0.00%

Stockholders_Equity_Summary_of5

Stockholders' Equity - Summary of Stock-based Compensation Expense (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$3,920	$2,147
Cost of Providing Services
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	758	454
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	917	517
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	2,021	1,008
Systems Development and Programming Costs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$224	$168

Earnings_Per_Share_Schedule_of

Earnings Per Share - Schedule of Earnings Per Share (Details) (USD $)	3 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Numerator (basic)
Net income	$15,811	$1,540
Less net income allocated to participating securities		-1,065
Net income attributable to common stock	15,811	475
Denominator (basic)
Weighted average shares of common stock outstanding	70,198,184	16,775,513
Basic EPS	$0.23	$0.03
Numerator (diluted)
Net income	15,811	1,540
Less net income allocated to participating securities		-1,016
Net income attributable to common stock	$15,811	$524
Denominator (diluted)
Weighted average shares of common stock outstanding	70,198,184	16,775,513
Dilutive effect of stock options and restricted stock units	3,152,000	2,622,000
Weighted average shares of common stock outstanding	73,350,219	19,397,777
Diluted EPS	$0.22	$0.03
Common stock equivalents excluded from income per diluted share because of their anti-dilutive effect	522,000	1,511,000

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	39.90%	56.40%
Employment tax credit			$10.50

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Commitments And Contingencies Disclosure [Abstract]
Rent expenses incurred	$3.10	$2.70