Financial Engines Inactive 10-K20 Feb 142013 FY Annual reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
Document and Entity Information (USD $)	Dec. 31, 2013	Jan. 31, 2014	Jun. 28, 2013
Document Information [Line Items]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'FNGN	'	'
Entity Registrant Name	'FINANCIAL ENGINES, INC.	'	'
Entity Central Index Key	'0001430592	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	51,004,477	'
Entity Public Float	'	'	$1,440,530,435

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:	'	'
Cash and cash equivalents	$126,003	$181,231
Short-term investments	120,027	'
Accounts receivable, net of allowances of $102 in 2012 and $124 in 2013	63,805	44,627
Prepaid expenses	3,271	3,093
Deferred tax assets	17,363	15,293
Other current assets	3,326	3,647
Total current assets	333,795	247,891
Property and equipment, net	15,273	13,366
Internal use software, net	8,530	10,339
Long-term deferred tax assets	4,989	20,639
Direct response advertising, net	9,717	10,236
Other assets	3,377	4,362
Total assets	375,681	306,833
Current liabilities:	'	'
Accounts payable	20,801	15,008
Accrued compensation	14,138	12,279
Deferred revenue	7,868	7,831
Dividend payable	2,540	'
Other current liabilities	959	260
Total current liabilities	46,306	35,378
Long-term deferred revenue	714	1,166
Long-term deferred rent	6,644	6,653
Other liabilities	131	250
Total liabilities	53,795	43,447
Contingencies (see note 8)	'	'
Stockholders' equity:	'	'
Preferred stock, $0.0001 par value - 10,000 authorized as of December 31, 2012 and 2013; None issued or outstanding as of December 31, 2012 and 2013	'	'
Common stock, $0.0001 par value - 500,000 authorized as of December 31, 2012 and 2013; 47,915 and 50,890 shares issued and outstanding at December 31, 2012 and 2013, respectively	5	5
Additional paid-in capital	361,955	323,448
Accumulated deficit	-40,074	-60,067
Total stockholders' equity	321,886	263,386
Total liabilities and stockholders' equity	$375,681	$306,833

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts receivable, allowances	$124	$102
Preferred stock, par value	$0.00	$0.00
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	500,000	500,000
Common stock, shares issued	50,890	47,915
Common stock, shares outstanding	50,890	47,915

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:	'	'	'
Professional management	$202,811	$150,872	$108,215
Platform	33,475	32,373	32,891
Other	2,672	2,577	2,979
Total revenue	238,958	185,822	144,085
Costs and expenses:	'	'	'
Cost of revenue (exclusive of amortization of internal use software)	91,990	70,025	49,717
Research and development	30,917	25,483	21,182
Sales and marketing	43,400	39,206	30,710
General and administrative	21,353	15,537	13,518
Amortization of internal use software	6,402	6,125	5,923
Total costs and expenses	194,062	156,376	121,050
Income from operations	44,896	29,446	23,035
Interest income, net	58	3	10
Other income (expense)	-13	100	'
Income before income taxes	44,941	29,549	23,045
Income tax expense	14,986	10,975	7,900
Net and comprehensive income	$29,955	$18,574	$15,145
Dividends declared per share of common stock	$0.20	'	'
Net income per share attributable to holders of common stock	'	'	'
Basic	$0.61	$0.40	$0.34
Diluted	$0.57	$0.37	$0.31
Shares used to compute net income per share attributable to holders of common stock	'	'	'
Basic	49,512	46,741	44,783
Diluted	52,335	50,211	49,407

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total		Common stock	Additional paid-in capital	Deferred stock compensation	Accumulated deficit
In Thousands, except Share data	Total		Common stock	Additional paid-in capital	Deferred stock compensation	Accumulated deficit
Beginning Balance at Dec. 31, 2010	$185,220		$4	$279,038	($36)	($93,786)
Beginning Balance (in shares) at Dec. 31, 2010	'		43,116,178	'	'	'
Issuance of common stock upon exercise of options, net (in shares)	2,747,150	[1]	2,738,418	'	'	'
Issuance of common stock upon exercise of options, net	14,103		1	14,102	'	'
Net share settlements for stock-based minimum tax withholdings, shares	'		-70,744	'	'	'
Net share settlements for stock-based minimum tax withholdings	-1,718		'	-1,718	'	'
Amortization of deferred stock-based compensation under the intrinsic value method	36		'	'	36	'
Stock-based compensation under the fair value method	5,751		'	5,751	'	'
Excess tax benefit associated with stock-based compensation	1,023		'	1,023	'	'
Net income	15,145		'	'	'	15,145
Ending Balance at Dec. 31, 2011	219,560		5	298,196	'	-78,641
Ending Balance (in shares) at Dec. 31, 2011	'		45,783,852	'	'	'
Issuance of common stock upon exercise of options, net (in shares)	2,086,590		2,086,590	'	'	'
Issuance of common stock upon exercise of options, net	13,644		'	13,644	'	'
Vested restricted stock units converted to shares	'		71,283	'	'	'
Net share settlements for stock-based minimum tax withholdings, shares	'		-26,676	'	'	'
Net share settlements for stock-based minimum tax withholdings	-699		'	-699	'	'
Stock-based compensation under the fair value method	10,345		'	10,345	'	'
Excess tax benefit associated with stock-based compensation	1,962		'	1,962	'	'
Net income	18,574		'	'	'	18,574
Ending Balance at Dec. 31, 2012	263,386		5	323,448	'	-60,067
Ending Balance (in shares) at Dec. 31, 2012	'		47,915,049	'	'	'
Issuance of common stock upon exercise of options, net (in shares)	2,880,561		2,880,561	'	'	'
Issuance of common stock upon exercise of options, net	24,420		'	24,420	'	'
Vested restricted stock units converted to shares	'		152,249	'	'	'
Net share settlements for stock-based minimum tax withholdings, shares	'		-57,369	'	'	'
Net share settlements for stock-based minimum tax withholdings	-3,473		'	-3,473	'	'
Stock-based compensation under the fair value method	16,415		'	16,415	'	'
Cash dividends declared ($0.20 per share)	-9,962		'	'	'	-9,962
Excess tax benefit associated with stock-based compensation	1,145		'	1,145	'	'
Net income	29,955		'	'	'	29,955
Ending Balance at Dec. 31, 2013	$321,886		$5	$361,955	'	($40,074)
Ending Balance (in shares) at Dec. 31, 2013	'		50,890,490	'	'	'

[1]	Exercises for the year ended December 31, 2011 include 8,732 shares, which were tendered in exchange for option exercises.

Consolidated_Statements_of_Sto1

Consolidated Statements of Stockholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013
Cash dividends per share	$0.20

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities:	'	'	'
Net income	$29,955	$18,574	$15,145
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	4,024	3,084	2,191
Amortization of internal use software	6,007	5,726	5,577
Stock-based compensation	16,518	10,372	5,823
Amortization of deferred sales commissions	1,869	1,932	1,423
Amortization and impairment of direct response advertising	5,994	5,149	2,734
Amortization of discount on short-term investments	29	'	'
Provision for doubtful accounts	448	311	152
Loss on fixed asset disposal	'	20	'
Excess tax benefit associated with stock-based compensation	-1,145	-1,962	-1,023
Changes in operating assets and liabilities:	'	'	'
Accounts receivable	-19,626	-14,444	-6,704
Prepaid expenses	-177	-85	-206
Deferred tax assets	13,579	8,648	6,566
Direct response advertising	-5,454	-6,515	-6,953
Other assets	-1,321	-2,631	-3,026
Accounts payable	6,510	6,844	3,333
Accrued compensation	1,859	-983	-2,345
Deferred revenue	-414	-2,228	2,274
Deferred rent	680	6,270	167
Other liabilities	-77	4	35
Net cash provided by operating activities	59,258	38,086	25,163
Cash flows from investing activities:	'	'	'
Purchase of property and equipment	-5,470	-11,903	-2,922
Capitalization of internal use software	-4,323	-5,389	-5,224
Purchases of short-term investments	-140,056	'	'
Maturities of short-term investments	20,000	'	'
Restricted cash	759	550	-360
Net cash used in investing activities	-129,090	-16,742	-8,506
Cash flows from financing activities:	'	'	'
Payments on capital lease obligations	-66	-22	'
Net share settlements for stock-based awards minimum tax withholdings	-3,473	-699	-1,718
Excess tax benefit associated with stock-based compensation	1,145	1,962	1,023
Cash dividend payments	-7,422	'	'
Proceeds from issuance of common stock	24,420	13,644	14,103
Net cash provided by financing activities	14,604	14,885	13,408
Net increase (decrease) in cash and cash equivalents	-55,228	36,229	30,065
Cash and cash equivalents, beginning of year	181,231	145,002	114,937
Cash and cash equivalents, end of year	126,003	181,231	145,002
Supplemental cash flows information:	'	'	'
Income taxes paid, net of refunds	506	194	-194
Interest paid	9	12	6
Non-cash operating, investing and financing activities:	'	'	'
Purchase of property and equipment under capital lease	34	255	'
Unpaid purchases of property and equipment	1,063	636	250
Capitalized stock-based compensation for internal use software	271	353	293
Capitalized stock-based compensation for direct response advertising	76	64	44
Dividends declared but not yet paid	$2,540	'	'

Organization_and_Description_o

Organization and Description of the Business	12 Months Ended
Organization and Description of the Business	Dec. 31, 2013
Organization and Description of the Business	'
	NOTE 1 — Organization and Description of the Business
	The Company
	Financial Engines, Inc. (the Company) was incorporated on May 13, 1996 under the laws of the State of California and is headquartered in Sunnyvale, California. In February 2010, the Company was reincorporated under the laws of the State of Delaware.
	Financial Engines is a provider of independent, technology-enabled portfolio management services, investment advice and retirement income services primarily to participants in employer-sponsored defined contribution plans, such as 401(k) plans. The Company helps investors plan for retirement by offering personalized plans for saving and investing, as well as by providing assessments of retirement income needs and readiness, regardless of personal wealth or investment account size. The Company uses its proprietary advice technology platform to provide independent, personalized portfolio management, investment advice and retirement income services to millions of retirement plan participants on a cost-efficient basis.

Basis_of_Presentation_and_Prin

Basis of Presentation and Principles of Consolidation

12 Months Ended

Dec. 31, 2013

Basis of Presentation and Principles of Consolidation

NOTE 2 — Basis of Presentation and Principles of Consolidation

The accompanying consolidated financial statements were prepared in accordance with accounting principles generally accepted in the United States of America (GAAP).

The accompanying consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reporting period. Significant items subject to such estimates and assumptions include revenue recognition, income taxes, stock-based compensation, direct response advertising, the useful lives of property, equipment and internal use software cost. Actual results could differ from those estimates under different assumptions or conditions.

Cash and Cash Equivalents

The Company considers all highly liquid investments with an original maturity of three months or less from date of purchase to be cash equivalents. Cash and cash equivalents are comprised of cash held primarily in money market accounts.

Short-term Investments

Short-term investments consist of U.S. Treasury securities. The Company classifies its short-term investments as held-to maturity as the Company has the positive intent and ability to hold to maturity and they are carried at amortized cost. The Company evaluates the investments periodically for possible other-than-temporary impairment. In order to determine whether a decline in value is other-than-temporary, the Company evaluates, among other factors: the duration and extent to which the fair value has been less than the carrying value, and its intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value.

Concentration of Credit Risk and Fair Value of Financial Instruments

The Company measures and reports its investments in money market funds at fair value on a recurring basis, which approximates their carrying value due to the short period of time to maturity, and reports its short-term investments in U.S. Treasury securities at amortized cost at each reporting period. There have been no changes in the Company’s valuation techniques during the years ended December 31, 2012 and 2013. The Company began purchasing six-month and twelve–month U.S. Treasury securities in May 2013. The U.S. Treasury securities have maturity dates through December 2014. Both the money market funds and U.S. Treasury securities are classified as Level 1.

The following table summarizes the Company’s financial assets measured at fair value on a recurring basis:

As of December 31, 2012

As of December 31, 2013

Total

Quoted Prices

Significant

Total

Quoted Prices

Significant

Fair Value

in Active

Other

Fair Value

in Active

Other

Markets for

Observable

Unobservable

Markets for

Observable

Unobservable

Identical

Inputs

Identical

Inputs

Assets

(Level 2) ⁽²⁾

(Level 3) ⁽³⁾

Assets

(Level 2) ⁽²⁾

(Level 3) ⁽³⁾

(Level 1) ⁽¹⁾

(In thousands)

Assets:

Money Market Funds ⁽⁴⁾

179,433

—

113,599

—

US Treasury Securities

—

120,037

—

-1

Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

-2

Level 2: Inputs reflect quoted prices for identical assets or liabilities in markets that are not active; quoted prices for similar assets or liabilities in active markets; inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

-3

Level 3: Unobservable inputs reflecting the Company’s own assumptions incorporated in valuation techniques used to determine fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available.

-4

Included in the December 31, 2012 money market balance is $0.8 million of long-term restricted cash, which was held in a money market account pledged as collateral for letters of credit issued in connection with certain operating lease contracts. As of September 30, 2013, the Company’s bank removed the collateral requirements associated with letters of credit related to the Company’s operating facilities.

Financial instruments that potentially subject the Company to significant concentrations of credit risk consist principally of cash, cash equivalents and accounts receivable. The Company maintains its cash and cash equivalents primarily in highly-rated money market funds, in which deposits may exceed federal deposit insurance limits. The Company maintains cash equivalents primarily in highly rated taxable and tax-exempt money market funds located in the U.S. and in various overseas locations.

The Company’s customers are concentrated in the United States of America. The Company performs ongoing credit evaluations of its customers and does not require collateral. The Company reviews the need for allowances for potential credit losses and such losses have been insignificant to date.

Significant customer information is as follows:

December 31,

2012

2013

Percentage of accounts receivable:

JPMorgan

15%

14%

ING

—

11%

Year Ended

December 31,

2011

2012

2013

Percentage of revenue:

JPMorgan

Allowance for Doubtful Accounts

Trade accounts receivable are recorded at the invoiced amount and are not interest bearing. The Company maintains an allowance for doubtful accounts to reserve for potentially uncollectible trade receivables. The Company reviews its trade receivables by aging category to identify significant customers with collection issues. For accounts not specifically identified, the Company provides reserves based on historical bad debt loss experience.

Property and Equipment

Property and equipment are stated at cost less accumulated depreciation. Depreciation is computed using the straight-line method over the estimated useful lives of the assets and allocated to the department of benefit in the accompanying Consolidated Statements of Income. Leasehold improvements and capital lease equipment are amortized over the shorter of the remaining lease term or the useful life of the asset. Software purchased for internal use is amortized over its useful life. Expenditures for maintenance and repairs are charged to expense as incurred.

Estimated

Useful Lives

in Years

Computer equipment

Computer software

Furniture, fixtures, and equipment

Leasehold improvements

life of the lease

Capital lease equipment

life of the lease

Internal Use Software

Certain direct development costs associated with internal use software are capitalized and include external direct consulting costs and payroll costs for employees devoting time to the software projects principally related to software coding, designing system interfaces and installation and testing of the software. Internal use software includes engineering costs associated with (1) enhancing the Company’s advisory service platform and (2) developing internal systems for tracking member data, including AUM, member cancellations and other related member statistics. The capitalized costs are amortized using the straight-line method over an estimated life of approximately two to four years, beginning when the asset is substantially ready for use. Costs related to preliminary project activities and post implementation activities are expensed as incurred. A portion of internal use software relates to cost of revenue, as well as the Company’s other functional departments. However the Company is not able to meaningfully allocate the costs among cost of revenue and operations. Accordingly, amortization is presented as a separate line item on the accompanying Consolidated Statements of Income.

During the years ended December 31, 2011, 2012 and 2013, the Company capitalized $5.5 million, $5.7 million and $4.6 million, respectively, of development costs, including interest and stock compensation expense, relating to technology to be used to enhance the Company’s internal use software and advisory service platform. For the years ended December 31, 2011, 2012 and 2013, the Company capitalized $0.3 million, $0.4 million and $0.3 million, respectively, of noncash stock-based compensation costs related to internal use software.

Long-Lived Assets

Long-lived assets, such as property, equipment and capitalized internal use software subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset group may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset group to estimated undiscounted future cash flows expected to be generated by the asset group. If the carrying amount of an asset group exceeds its estimated future cash flows, an impairment charge is recognized by the amount by which the carrying amount of the asset group exceeds the fair value of the asset group.

Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. During the years ended December 31, 2011, 2012 and 2013, impairments to long-lived assets were immaterial.

Deferred Sales Commissions

Deferred sales commissions consist of incremental costs paid to the Company’s sales force associated with the execution of non-cancelable customer contracts. The deferred sales commission amounts are recoverable through future revenue streams under the non-cancelable customer contracts. The Company believes this is the preferable method of accounting as the commission charges are so closely related to the revenue from the non-cancelable customer contracts that they should be recorded as an asset and charged to expense over the life of the related non-cancelable customer contracts, which is typically three to five years. Amortization of deferred sales commissions is included in marketing and sales expense in the accompanying Consolidated Statements of Income.

The Company capitalized sales commission of $2.6 million, $1.4 million and $1.2 million during the years ended December 31, 2011, 2012 and 2013, respectively, and amortized $1.4 million, $1.9 million and $1.9 million of deferred sales commissions during the years ended December 31, 2011, 2012 and 2013, respectively.

Comprehensive Income

Comprehensive income is defined as the change in equity of a business enterprise during a period from transactions and other events and circumstances from non-owner sources. Comprehensive income is the same as net income for all periods presented.

Segment Information

The Company operates in one reportable segment. The Company’s chief operating decision-maker, its chief executive officer, reviews its operating results on an aggregate basis and manages its operations as a single operating segment. In addition, all of the Company’s operations and assets are based in the United States.

Revenue Recognition

The Company recognizes revenue when all of the following conditions are met:

•

There is persuasive evidence of an arrangement, as evidenced by a signed contract;

•

Delivery has occurred or the service has been made available to the customer, which occurs upon completion of implementation and connectivity services and acceptance by the customer;

•

The collectability of the fees is reasonably assured; and

•

The amount of fees to be paid by the customer is fixed or determinable.

The Company generates its revenue through three primary sources: professional management, platform and other revenue.

Professional Management. The Company derives professional management revenue from member fees paid by plan participants who are enrolled in its Professional Management service for the management of their account assets. This discretionary investment management service includes a Retirement Plan analyzing investments, contribution rate and projected retirement income, and a Retirement Checkup designed to help plan participants to develop a strategy for closing the gap, if any, between the participant’s retirement goal and current retirement income forecast. The services are generally made available to plan participants in a 401(k) plan by written agreements between the Company and the plan provider, plan sponsor and the plan participant; and may be provided on a subadvisory basis. The arrangement generally provides for member fees based on the value of assets the Company manages for plan participants, and is generally payable quarterly in arrears. Revenue derived from Professional Management services is recognized as the services are performed. In order to encourage enrollment into the Professional Management service, the Company uses a variety of promotional techniques, some of which can potentially impact the amount of revenue recognized, the timing of revenue recognition or both.

In certain instances, fees payable by plan participants are deferred for a specified period, and are waived if the plan participant cancels within the specified period. The Company recognizes revenue during certain of these fee deferral periods based on the estimate of the expected fee retention rate determined by historical experience of similar arrangements.

Platform. The Company derives platform revenue from recurring, subscription-based fees for access to either its full suite of services, including Professional Management, Online Advice service and Retirement Evaluation, or to its legacy Online Advice service only, and to a lesser extent, from setup fees. Online Advice is a nondiscretionary Internet-based investment advisory service, which includes features such as: recommendations among the investment alternatives available in the employer sponsored retirement plan; a summary of the current value of the plan account; a forecast of how much the plan account investments might be worth at retirement; whether a change is recommended to the contribution rate, risk and diversification and/or unrestricted employer stock holdings; and a projection of how much the participant may spend at retirement. Plan participants may use the service as frequently as they choose to monitor progress toward their financial goals, receive forecasts and investment recommendations and access educational content at the Company’s website. The arrangements generally provide for the Company’s fees to be paid by the plan sponsor, plan provider or the retirement plan itself, depending on the plan structure. Platform revenue is generally paid annually or quarterly in advance and recognized ratably over the term of the subscription period beginning after the completion of customer setup and data connectivity. Setup fees are recognized ratably over seven years.

Other. Other revenue includes reimbursement for a portion of marketing and member materials from certain subadvisory relationships, and reimbursement for providing personal statements to participants from a limited number of plan sponsors. Revenue is recognized as the related services are performed, in accordance with the specific terms of the contract with the customers.

Deferred Revenue

Deferred revenue consists primarily of billings or payments received in advance of revenue recognition generated by the Company’s platform service and setup fees described above. For these services, the Company generally invoices its customers in annual or quarterly installments payable in advance. Accordingly, the deferred revenue balance does not represent the total contract value of annual or multiyear, noncancelable subscription contracts.

Cost of Revenue

Cost of revenue includes fees paid to plan providers for connectivity to plan and plan participant data, printed materials fulfillment costs for certain subadvisory relationships for which the Company is reimbursed, printed member materials, and employee-related costs for technical operations, implementations, operations, advisor call center operations, portfolio management and customer support. The expenses included in cost of revenue are shared across the different revenue categories, and the Company is not able to meaningfully allocate such costs between separate categories of revenue. Consequently, all costs and expenses applicable to the Company’s revenue are included in the category cost of revenue in the Consolidated Statements of Income. Costs in this area are related primarily to payments to third parties, employee compensation and related expenses, and purchased materials. Amortization of internal use software, a portion of which relates to the Company’s cost of revenue, is not included in cost of revenue but is reflected as a separate line item in the Company’s Consolidated Statements of Income.

Direct Response Advertising

The Company’s advertising costs consist primarily of print materials associated with new customer solicitations. These costs relate primarily to either Active Enrollment campaigns, where marketing materials are sent to solicit enrollment in the Company’s Professional Management service, or Passive Enrollment campaigns, where the plan sponsor defaults all eligible members into the Professional Management service unless they decline. Advertising costs relating to Passive Enrollment campaigns and other general marketing materials sent to participants do not qualify as direct response advertising and are expensed to sales and marketing in the period the advertising activities first take place. Print fulfillment costs relating to subadvisory campaigns do not qualify as direct response advertising and are expensed to cost of revenue in the period in which the expenses were incurred. Advertising costs associated with direct advisory Active Enrollment campaigns qualify for capitalization as direct response advertising. The capitalized costs are amortized over the estimated three-year period of probable future benefits following the enrollment of a member into the Professional Management service based on the ratio of current period revenue for the direct response advertising cost pool as compared to the total estimated revenue expected for the direct response advertising cost pool over the remaining period of probable future benefits. The realizability of the amounts of direct response advertising reported as assets are evaluated at each balance sheet date by comparing the carrying amounts of such assets on a cost-pool-by-cost-pool basis to the probable remaining future net revenues expected to result directly from such advertising.

The Company capitalizes of direct response advertising costs associated with direct advisory Active Enrollment campaigns as the Company has sufficient and verifiable historical patterns to demonstrate the probable future benefits of such campaigns. During the years ended December 31, 2011, 2012 and 2013, the Company capitalized $7.0 million, $6.6 million and $5.5 million, respectively, of direct response advertising costs. Advertising expense was $3.6 million, $5.9 million and $6.4 million for the years ended December 31, 2011, 2012 and 2013, respectively, of which direct response advertising amortization was $2.8 million, $5.2 million and $6.0 million, respectively. During the years ended December 31, 2011, 2012 and 2013, impairments to direct response advertising were immaterial.

Deferred Income Taxes

Deferred tax assets and liabilities are determined based on temporary differences between financial reporting and the tax bases of assets and liabilities. Deferred tax assets are also recognized for tax net operating loss carryforwards. These deferred tax assets and liabilities are measured using the enacted tax rates and laws that are expected to be in effect when such amounts are expected to reverse or be utilized. The realization of total deferred tax assets is contingent upon the generation of future taxable income. Valuation allowances are provided to reduce such deferred tax assets to amounts more likely than not to be ultimately realized. See Note 6 for additional information.

Stock-based Compensation

Employee stock-based compensation expense is based on the following: (1) the grant date fair value of stock option awards granted or modified after January 1, 2006, (2) the balance of deferred stock-based compensation related to stock awards granted prior to January 1, 2006, which was calculated using the intrinsic value method and (3) the fair value of the Company’s common stock as of the grant date for restricted stock units (RSUs) and performance stock units (PSUs).

The Company estimates the fair value of stock options granted using the Black-Scholes option pricing model. The Company currently uses the simplified method in developing an estimate of expected term of stock options. The expected term represents the period that stock-based awards are expected to be outstanding, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior as influenced by changes to the terms of the Company’s stock-based awards. The computation of expected volatility is based on a combination of the historical and implied volatility of comparable companies from a representative peer group based on industry and market capitalization data, as well as the Company’s own historical volatility. Effective January 1, 2013, the Company included a dividend yield in its Black-Scholes option pricing model to reflect the anticipated dividends to be paid over the expected term of the awards.

The Company expenses RSUs over the performance period based on the fair market value of the awards at the date of grant.

The Company expenses PSUs based on the fair market value of the awards on the date of grant and number of shares ultimately expected to vest at the end of each performance period, ratably over the each of the performance periods. Each PSU award consists of two vesting cliffs, with sixty percent eligible to vest on December 31, 2015 and forty percent eligible to vest on December 31, 2017. Depending on performance against the target metrics, vesting will be between 0% and 140%. The actual number of shares of common stock issued will be determined on each vesting cliff date based on actual performance results against the target metrics. For PSUs, the Company re-assesses the probability of achieving the target metrics at the end of each reporting period and adjusts the recognition of expense accordingly.

The Company’s stock-based compensation instruments are accounted for as equity awards as the settlement is in shares of the Company’s common stock. The Company amortizes stock-based compensation expense using a graded vesting method over the requisite service periods of the awards, which is generally the vesting period. Management estimates expected forfeitures and recognizes compensation costs only for those stock-based awards expected to vest. Amortization of stock-based compensation is presented in the same line item as the cash compensation to those employees in the accompanying Consolidated Statements of Income.

The Company’s current practice is to issue new shares to settle stock option exercises and on vesting of RSUs and PSUs.

Net Income per Common Share

Basic net income per common share is computed by dividing net income attributable to common stockholders by the weighted average number of common shares outstanding during the period less the weighted average number of unvested restricted common shares subject to the right of repurchase. Diluted net income per common share is computed by giving effect to all dilutive potential common shares, including options, RSUs, PSUs, and unvested restricted common stock subject to repurchase.

Recent Accounting Pronouncements Adopted

There are no recent accounting pronouncements that have had or will have a material effect on our operating results or financial position.

Balance_Sheet_Items

Balance Sheet Items	12 Months Ended
Balance Sheet Items	Dec. 31, 2013
Balance Sheet Items	'
	NOTE 3 — Balance Sheet Items
	Cash and Cash Equivalents
	Cash and cash equivalents consist of the following:


			December 31,
			2012				2013
			(In thousands)
	Cash		$	2,558			$	12,404
	Money market fund			178,673				113,599

	Total cash and cash equivalents		$	181,231			$	126,003

	Short-term Investments
	The Company considers all investments purchased with an original remaining maturity of between three and twelve months at the date of purchase to be short-term investments. U.S. Treasury securities are classified as short-term investments and held-to-maturity. A reconciliation of amortized cost and fair value of short-term investments is as follows:


			December 31,
			2013
			(In thousands)
	U.S. Treasury Securities:
	Amortized cost		$	120,027
	Gross unrecognized gains			12
	Gross unrecognized losses			(2	)

	Fair value		$	120,037


	Allowance for Doubtful Accounts
	The following table summarizes the changes to the allowance for doubtful accounts:


			December 31,
			2011				2012			2013
			(In thousands)
	Balance, beginning of year		$	69			$	67		$	102
	Add: Provisions for doubtful accounts			152				311			448
	Less: Write-offs			(154	)			(276	)		(426	)

	Balance, end of year		$	67			$	102		$	124

	Property and Equipment
	Property and equipment consist of the following:


			December 31,
			2012				2013
			(In thousands)
	Computer equipment		$	6,373			$	8,238
	Computer software			1,453				1,684
	Furniture, fixtures and equipment			4,918				6,724
	Leasehold improvements			7,158				9,188

	Total property and equipment			19,902				25,834
	Less: Accumulated depreciation			(6,536	)			(10,561	)

	Property and equipment, net		$	13,366			$	15,273

	Depreciation and amortization expense was $2.2 million, $3.1 million and $4.0 million for the years ended December 31, 2011, 2012 and 2013, respectively. Included in property and equipment as of December 31, 2013 are assets acquired under capital lease obligations with original costs of $0.3 million. Accumulated depreciation on the capital lease assets was $0.1 million as of December 31, 2013.
	Internal Use Software
	Internal use software consists of the following:


		December 31,
		2012				2013
		(In thousands)
Capitalized internal use software		$	40,845			$	44,192
Accumulated amortization			(30,506	)			(35,662	)

Internal use software, net		$	10,339			$	8,530

For the year ended December 31, 2012 and 2013, the Company adjusted down $6.2 million and $1.2 million, respectively, of fully amortized internal use software projects that were no longer in service.

Other Current Assets
Other current assets consist of the following:


		December 31,
		2012				2013
		(In thousands)
Deferred sales commissions		$	1,795			$	1,523
Other			1,852				1,803

Total other current assets		$	3,647			$	3,326

Accrued Compensation
Accrued compensation consists of the following:


		December 31,
		2012				2013
		(In thousands)
Accrued bonus		$	8,624			$	10,329
Accrued vacation			2,615				2,775
Accrued commission			667				482
Accrued payroll			234				502
Other			139				50

Total accrued compensation		$	12,279			$	14,138

Stockholders_Equity

Stockholders' Equity	12 Months Ended
Stockholders' Equity	Dec. 31, 2013
Stockholders' Equity	'
	NOTE 4 — Stockholders’ Equity
	Common Stock
	As of December 31, 2013, there were 500,000,000 shares of common stock authorized and 50,890,490 shares issued and outstanding. Common stockholders are entitled to dividends if and when declared by the Board of Directors.
	Cash Dividends
	Prior to fiscal 2013, the Company did not pay any cash dividends on its common stock. For the year ended December 31, 2013, the Board of Directors declared quarterly cash dividends totaling $0.20 per share of common stock outstanding. On February 11, 2014 the Board of Directors declared a quarterly dividend of $0.06 per share to be paid on April 4, 2014 to record-holders as of March 21, 2014. While the Company currently expects to pay comparable cash dividends on a quarterly basis in the future, any future determination with respect to the declaration and payment of dividends will be at the discretion of the Board of Directors. As of December 31, 2013, the Company had a dividend payable balance of $2.5 million, which was paid to stockholders in January 2014.

	Common Stock Reserved for Future Issuance
	As of December 31, 2013, the Company has reserved the following shares of common stock for issuance in connection with:


			December 31,
			2013
	Stock options outstanding			3,918,890
	Restricted stock units outstanding			562,638
	Performance stock units outstanding			414,300
	Stock awards available for grant			2,759,230

	Total shares reserved			7,655,058

	Stock Plans
	1998 Stock Plan
	The 1998 Stock Plan expired in April 2010. The Company has reserved a total of 1,942,638 shares of its common stock for issuance under its 1998 Stock Plan related to options granted prior to the initial public offering. Under the 1998 Stock Plan, the Board of Directors granted stock purchase rights and incentive and nonstatutory stock options to employees, consultants and directors at fair market value on the date of grant. Vesting provisions of stock purchase rights and options granted under the 1998 Stock Plan were determined by the Board of Directors. Stock purchase rights have a 30-day expiration period, and options expire no later than 10 years from the date of grant. In the event of voluntary or involuntary termination of employment with the Company, with or without cause, typically all unvested options are forfeited and all vested options must be exercised within three months or they are forfeited.
	Stock purchase rights or options acquired under the 1998 Stock Plan are exercisable upon grant; however, they generally vest over a period of four years. In the event of voluntary or involuntary termination of employment with the Company for any reason, with or without cause, the Company shall, upon the date of such termination, have an irrevocable, exclusive option to repurchase the unvested shares purchased prior to vesting, at the original exercise price. This repurchase option exists for a period of 60 days from termination. As of December 31, 2013, no shares were subject to repurchase under the 1998 Stock Plan.
	2009 Stock Incentive Plan
	The Company has reserved a total of 2,341,765 shares of its common stock for issuance under its Amended and Restated 2009 Stock Incentive Plan (the 2009 Stock Incentive Plan).
	In February 2013, the Board of Directors amended and restated the 2009 Stock Incentive Plan and approved the 2013-2017 Long-Term Incentive Program (the LTIP) thereunder, which subsequently approved by stockholders in May 2013. Under the LTIP, the Company may grant performance stock unit (PSUs) awards based on objective performance criteria pre-established by the Compensation Committee of the Board of Directors.
	Under the 2009 Stock Incentive Plan, the Board of Directors may grant restricted stock awards, RSUs, PSUs, stock appreciation rights and incentive and non-statutory stock options to employees, consultants and directors at fair market value on the date of grant. Vesting provisions of equity awards granted under the 2009 Stock Incentive Plan are determined by the Board of Directors. Options granted will generally vest over a period of four years with 25% vesting on the first anniversary of the grant date and 1/48 vesting per month thereafter. Options expire no later than 10 years from the date of grant. RSUs will vest according to the terms of the award on the date of the grant, which is typically a period of four years with 25% of the shares vesting on each anniversary after the grant date. Restricted stock and PSUs awarded will vest according to the terms of the award on the date of the grant.
	For PSUs granted for the year ended December 31, 2013, each PSU award consists of two vesting cliffs, with 60% eligible to vest on December 31, 2015 and 40% eligible to vest on December 31, 2017. Depending on performance against the target metrics, vesting will be between 0% and 140%. On a quarterly basis, the estimated probability of achieving the objective performance criteria is re-evaluated by management and the expense is adjusted accordingly at the end of each balance sheet period. The number of shares of our common stock issued to the award recipients at the end of each of the PSU vesting periods will be based on actual achievement results.
	Options, RSUs and PSUs carry neither voting rights nor rights to dividends.
	In the event of voluntary or involuntary termination of employment with the Company, with or without cause, typically all unvested options, RSUs and PSUs are forfeited and all vested options must be exercised within three months or they are forfeited. Certain awards under the 2009 Stock Incentive Plan also provide for partial acceleration in the event of involuntary termination within 12 months of a change of control event, death, or total and permanent disability.
	Upon vesting, RSUs and PSUs are settled in common stock on a one-for-one basis. Upon vesting of the RSUs and PSUs, the Company typically withholds shares that would otherwise be distributed to the employee when the RSUs and PSUs are settled having a fair market value equal to the amount necessary to satisfy minimum tax withholding obligations, which the Company will remit from operational cash.
	As of December 31, 2013, no shares were subject to repurchase and 2,759,230 shares were available for future grant. The 2009 Stock Incentive Plan expires in November 2019.
	Stock Option Plans
	The following table summarizes option activity under the 1998 Stock Plan and the 2009 Stock Incentive Plan:


										Weighted			Weighted
										Average			Average			Aggregate
			Number of				Exercise			Exercise			Remaining			Intrinsic
			Options				Price			Price			Term			Value
	Balance, January 1, 2011			9,741,469			$	1.00 - $17.61		$	6.49
	Granted			846,180				18.20 - 28.68			23.15
	Exercised ⁽¹⁾			(2,747,150	)			1.00 - 17.22			5.21
	Forfeited			(154,545	)			6.04 - 28.68			9.61

	Balance, December 31, 2011			7,685,954				1.00 - 28.68			8.71

	Granted			1,101,425				20.15 -26.22			24.09
	Exercised			(2,086,590	)			1.00 - 25.92			6.54
	Forfeited			(269,474	)			6.51 - 27.17			14.16

	Balance, December 31, 2012			6,431,315				2.50 - 28.68			11.83

	Granted			603,656				28.87 - 68.69			46.3
	Exercised			(2,880,561	)			2.50 - 28.87			8.48
	Forfeited			(235,520	)			7.10 - 68.69			24.42

	Balance, December 31, 2013			3,918,890			$	3.00 - $68.69		$	18.79			6.58 years		$	198,647,608

	Vested and expected to vest, December 31, 2013			3,749,450			$	3.00 - $68.69		$	18.04			6.47 years		$	192,855,120
	Exercisable, December 31, 2013			2,455,607			$	3.00 - $57.21		$	10.55			5.29 years		$	144,711,326

	-1	Exercises for the year ended December 31, 2011 include 8,732 shares, which were tendered in exchange for option exercises.
The aggregate intrinsic values in the table above represent the total pre-tax intrinsic value (the aggregate difference between the fair value of the Company’s common stock on December 31, 2013 of $69.48, and the exercise price of in-the-money options) that would have been received by the option holders had all option holders exercised their options as of that date. The total intrinsic value of options exercised during the years ended December 31, 2011, 2012 and 2013 was $47.0 million, $44.2 million and $105.6 million, respectively. The weighted average fair value per share of options granted to employees for the years ended December 31, 2011, 2012 and 2013 was approximately $10.65, $9.85 and $16.45, respectively. Total cash received from employees as a result of employee stock option exercises for the years ended December 31, 2011, 2012 and 2013 was $14.1 million, $13.6 million and $24.4 million, respectively. The total grant-date fair value of the shares vested during the years ended December 31, 2011, 2012 and 2013 was $5.5 million, $7.5 million and $6.9 million, respectively.
As of December 31, 2013, there was $9.2 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options granted after January 1, 2006, to be recognized over the weighted average remaining requisite service period of 1.4 years.
The following weighted average assumptions were used to value options granted:


		2011		2012		2013
Expected life in years		6		6		6
Risk-free interest rate		1.72%		0.98%		1.41%
Volatility		47%		42%		36%
Dividend yield		—		—		0.40%
The following table summarizes information about outstanding and exercisable options as of December 31, 2013:


		Options Outstanding										Options Exercisable
						Weighted
						Average			Weighted						Weighted
						Remaining			Average						Average
		Number				Contractual			Exercise			Number			Exercise
Exercise Price		Outstanding				Life (years)			Price			Exercisable			Price
$ 3.00 - $6.51			663,908				3.74		$	5.77			663,908		$	5.77
$ 7.10 - $7.50			275,479				2.56			7.48			275,479			7.48
$ 7.99 - $7.99			881,625				5.83			7.99			881,625			7.99
$ 8.00 - $21.39			648,258				7.31			18.41			362,888			16.64
$21.50 - $26.22			767,795				8.48			24.9			207,792			24.91
$27.17 - $57.21			557,700				8.93			39.24			63,915			27.5
$57.72 - $68.69			124,125				9.8			62.54			—			—

$ 3.00 - $68.69			3,918,890				6.58		$	18.79			2,455,607		$	10.55


Restricted Stock Units Information
The following table summarizesRSU activity under the 2009 Stock Incentive Plan:


						Weighted			Weighted
						Average			Average			Aggregate
		Number of				Grant-Date			Remaining			Intrinsic
		Shares				Fair Value			Term			Value
Balance, January 1, 2011			—			$	0
Granted			307,750				21.39
Vested and settled			—				0
Forfeited			(2,290	)			21.39

Balance, December 31, 2011			305,460				21.39

Granted			347,190				25.59
Vested and settled⁽¹⁾			(71,283	)			21.39
Forfeited			(21,591	)			21.39

Balance, December 31, 2012			559,776				24

Granted			203,325				55.07
Vested and settled⁽¹⁾			(152,249	)			23.8
Forfeited			(48,214	)			26.47

Balance, December 31, 2013			562,638			$	35.07			1.80 years		$	39,092,088

Expected to vest, December 31, 2013			476,954			$	35.07			1.72 years		$	33,138,749

-1	Vested and settled for the years ended December 31, 2012 and 2013 includes 26,676 shares and 57,369 shares, respectively, which were tendered in exchange for minimum tax withholdings.
The aggregate intrinsic values in the table above represent the total pre-tax intrinsic value (using the fair value of the Company’s common stock on December 31, 2013 of $69.48). As of December 31, 2013, the aggregate intrinsic value of unvested RSUs was $39.1 million. The total intrinsic value of RSUs vested and settled during the years ended December 31, 2012 and 2013 was $2.0 million and $9.0 million, respectively. The total grant-date fair value of shares vested during the years ended December 31, 2012 and 2013 was $1.5 million and $3.6 million, respectively.
As of December 31, 2013, there was $11.2 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to restricted stock purchase rights to be recognized over the weighted average remaining requisite service period of 2.4 years.
Performance Stock Units Information
During the year ended December 31, 2013, the Compensation Committee of the Board of Directors granted PSUs to certain executives. There were no PSUs granted prior to the year ended December 31, 2013.

The following table summarizes unvested PSU activity under the 2009 Stock Incentive Plan:


						Weighted			Weighted
						Average			Average			Aggregate
		Number of				Grant-Date			Remaining			Intrinsic
		Shares				Fair Value			Term			Value
Balance, January 1, 2013			—			$	0
Granted			414,300				43.59
Vested and settled			—				0
Forfeited			—				0

Balance, December 31, 2013			414,300			$	43.59			2.80 years		$	28,785,564

Expected to vest, December 31, 2013			319,873			$	43.59			2.71 years		$	22,224,758
The aggregate intrinsic values in the table above represent the total pre-tax intrinsic value (using the fair value of the Company’s common stock on December 31, 2013 of $69.48).
As of December 31, 2013, there was $6.2 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested PSUs to be recognized over the weighted average remaining requisite service period of 2.8 years.
Special Executive Restricted Stock Purchase Plan
The Special Executive Restricted Stock Purchase plan (the Special Restricted Plan) expired in June 2011. Under the Special Restricted Plan, the Board of Directors had the option to grant stock purchase rights to employees and consultants at an exercise price determined by the Board of Directors at the date of grant. The shares cliff vested over an initial vesting period of three to seven years. The restrictions lapsed over a period of six to twelve months following the Company’s initial public offering.
The Company recorded $36,000 as amortization of deferred compensation in the year ended December 31, 2011. As of December 31, 2012 and 2013, there were no shares subject to repurchase and no remaining balance in deferred stock-based compensation.
The following table summarizes restricted stock purchase right activity under the Special Restricted Plan:


						Weighted
						Average
		Number of				Exercise
		Options				Price
Balance, January 1, 2011			175,000				4.47
Granted			—				—
Released ⁽¹⁾			(175,000	)			4.47
Forfeited			—				—

Balance, December 31, 2011			—				—


-1	Shares released on vesting for the year ended December 31, 2011 include 70,744 shares, which were tendered in exchange for minimum tax withholding.

Stock-based Compensation
The following table summarizes the stock-based compensation by functional area:


		Year Ended December 31,
		2011				2012			2013
		(In thousands)
Stock-based compensation:
Cost of revenue		$	489			$	1,123		$	1,846
Research and development			1,279				2,321			4,019
Sales and marketing			1,455				2,787			4,073
General and administrative			2,255				3,741			6,184
Amortization of internal use software			345				400			396

Total stock-based compensation		$	5,823			$	10,372		$	16,518

Recognized income tax benefit on stock-based compensation included with income tax expense for the years ended December 31, 2011, 2012 and 2013 was $1.5 million, $3.8 million and $6.9 million, respectively.

Net_Income_Per_Common_Share

Net Income Per Common Share	12 Months Ended
Net Income Per Common Share	Dec. 31, 2013
Net Income Per Common Share	'
	NOTE 5 — Net Income Per Common Share
	The following table sets forth the computation of basic and diluted net income per share attributable to holders of common stock:


		Year Ended December 31,
		2011			2012		2013
		(In thousands, except per share data)
	Numerator (basic and diluted):
	Net income	$	15,145		$	18,574	$	29,955

	Denominator (basic):
	Weighted average common shares outstanding		44,820			46,741		49,512
	Less: Weighted average unvested restricted common shares subject to repurchase		(37	)		—		—

	Net weighted average common shares outstanding		44,783			46,741		49,512

	Denominator (diluted):
	Weighted average common shares outstanding		44,783			46,741		49,512
	Dilutive stock options and awards outstanding		4,586			3,374		2,575
	Dilutive unvested restricted stock units		1			96		242
	Dilutive unvested performance stock units		—			—		6
	Weighted average unvested restricted common shares subject to repurchase		37			—		—

	Net weighted average common shares outstanding		49,407			50,211		52,335

	Net income per share attributable to holders of common stock:
	Basic	$	0.34		$	0.4	$	0.61
	Diluted	$	0.31		$	0.37	$	0.57

	Diluted net income per share does not include the effect of the following anti-dilutive common equivalent shares:


		2011			2012		2013
		(In thousands)
	Stock options outstanding		326			1,027		285
	Restricted stock units outstanding		—			37		19
	Performance stock units outstanding		—			—		20

	Total anti-dilutive common equivalent shares		326			1,064		324

Income_Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2013
Income Taxes	'
	NOTE 6 — Income Taxes
	The Company is subject to income taxes only in the United States. Provision for income tax expense consists of the following:


			Year Ended December 31,
			2011				2012			2013
			(In thousands)
	Current expense:
	Federal		$	33			$	2		$	857
	State			1,301				2,325			3,278

	Total current		$	1,334			$	2,327		$	4,135

	Deferred expense:
	Federal		$	6,944			$	9,018		$	13,126
	State			(378	)			(370	)		(2,275	)

	Total deferred		$	6,566			$	8,648		$	10,851

	Total provision for income taxes		$	7,900			$	10,975		$	14,986

	The Company’s current income tax expense has been reduced by employee stock-based awards. For stock options, the Company receives an income tax benefit calculated as the tax effect of the difference between the fair market value of the stock issued at the time of the exercise and the exercise price. For RSUs, the Company receives an income tax benefit upon the award’s vesting equal to the tax effect of the underlying stock’s fair market value. If an incremental tax benefit is realized as a reduction of income tax payable, such excess tax benefit is recognized as an increase to additional paid-in capital. The excess tax benefits from employee stock-based awards transactions in the years ended December 31, 2011, 2012 and 2013 were $1.0 million, $2.0 million and $1.2 million, respectively.

	The difference between income tax expense and the amount resulting from applying the federal statutory rate of 35% to net income is attributable to the following:


			Year Ended December 31,
			2011				2012			2013
	Federal tax at statutory rate			35	%			35	%		35	%
	State taxes, net of federal benefit			4.1				4.4			4.7
	Nondeductible expenses			0.2				0.2			0.1
	Stock-based compensation			0.1				(2.0	)		(2.2	)
	Research and development credit			(4.8	)			(0.8	)		(1.6	)
	Change in valuation allowance			(0.7	)			0			(2.5	)
	Other			0.4				0.3			(0.2	)

	Income tax expense			34.3	%			37.1	%		33.3	%

	The components of the Company’s deferred tax assets and liabilities are as follows:


			December 31,
			2012				2013
			(In thousands)
	Deferred tax assets:
	Net operating loss carryforwards		$	25,402			$	8,668
	Tax credits			4,241				4,925
	Deferred revenue			585				433
	Stock-based compensation			6,967				9,239
	Other temporary differences			7,945				8,250

	Total gross deferred tax assets			45,140				31,515
	Valuation allowance			(1,380	)			(255	)

	Net deferred tax assets			43,760				31,260

	Deferred tax liabilities
	Fixed assets and intangibles amortization			(7,828	)			(8,907	)

	Total deferred tax liabilities			(7,828	)			(8,907	)

	Net deferred tax assets		$	35,932			$	22,353

The Company continuously evaluates additional facts representing positive and negative evidence in the determination of the realizability of the deferred tax assets. As of December 31, 2013, the Company continues to apply a valuation allowance on certain deferred tax assets in the amount of $0.3 million relating to net operating losses for the State of California as it is not more likely than not that the Company will be able to realize these assets prior to their expiration. During the year ended December 31, 2013, the Company released the valuation allowance of $1.1 million previously established related to deferred tax assets for California net operating losses. Upon evaluating the positive and negative evidence present at December 31, 2013, management concluded it was more likely than not that this portion of the deferred tax assets would be fully realizable. As of December 31, 2013, the amount of pre-tax income the Company needs to generate in future years in order to realize its deferred tax assets is approximately $44.1 million and $61.5 million with respect to approximately $15.4 million of federal related deferred tax assets and $6.9 million of state related net deferred tax assets, respectively.

As of December 31, 2013, the Company has net operating loss carryforwards for federal and state income tax purposes of approximately $194.3 million and $67.5 million, respectively, available to reduce future income subject to income taxes. The federal and state net operating loss carryforwards expire through 2033. At December 31, 2013, net operating losses of $175.2 million, federal, and $33.1 million, state, relate to excess stock based compensation, and accordingly, no deferred tax asset is recognized for such amounts and any benefits realized will be recorded to stockholders’ equity. As of December 31, 2013, the Company has research credit carryforwards for federal and California income tax purposes of approximately $5.5 million and $7.7 million, respectively, available to reduce future income taxes. The federal research credit carryforwards expire through 2033. The California research credit carries forward indefinitely. The federal research and development credit expired on December 31, 2011. On January 2, 2013, the American Taxpayer Relief Act of 2012 was signed into law. Under this act, the federal research and development credit was retroactively extended for amounts paid or incurred after December 31, 2011 and before January 1, 2014. The effects of these changes in the tax law resulted in a tax benefit which was recognized in the first quarter of 2013, which is the quarter in which the law was enacted.
A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:


		Year Ended December 31,
		2012				2013
		(In thousands)
Balance, beginning of year		$	6,600			$	6,742
Reductions for tax positions taken in the prior year			—				(170	)
Additions for tax positions taken in the current year			142				70

Balance, end of year		$	6,742			$	6,642

As of December 31, 2013, unrecognized tax benefits approximating $5.1 million would affect the effective tax rate if recognized.
The Company does not anticipate adjustments to unrecognized tax benefits which would result in a material change to its financial position within the next twelve months.
The Company recognizes accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense. During the years ended December 31, 2011, 2012 and 2013, the accrued interest and penalties were immaterial.
The Company is subject to income taxes in the U.S. federal jurisdiction and various state jurisdictions. All tax years since inception are open due to loss carryforwards and may be subject to examination in one or more jurisdictions. The Company has undergone a federal tax examination for fiscal years 2006 and 2007 and the results did not have a material impact on its financial condition and results of operations.

Savings_Plan

Savings Plan	12 Months Ended
Savings Plan	Dec. 31, 2013
Savings Plan	'
	NOTE 7 — Savings Plan
	The Company maintains a savings plan under Section 401(k) of the Internal Revenue Code. Under the plan, employees may contribute up to 75% of their pre-tax salaries per year, but not more than the statutory limits. The Company may, at its discretion, make matching contributions to the 401(k) Plan. For the years ended December 31, 2011, 2012 and 2013, the Company made matching contributions of 50% of employee contributions up to 3% of salary (including commissions), which totaled $1.0 million, $1.2 million and $1.3 million, respectively.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2013
Commitments and Contingencies	'
	NOTE 8 — Commitments and Contingencies
	Commitments
	The Company leases its facilities under non-cancelable operating leases expiring at various dates through the year 2020.
	The Company entered into an operating lease contract for a new Sunnyvale, California headquarters’ facilities space in October 2011, which terminates in May 2020. The Company has one option to extend the lease term for an additional period of sixty months. The Company also has a continuing right of first offer to lease any full floor space in the building in which the leased premises are located that becomes available during the lease term. The Company recognizes rent expense on a straight-line basis over the lease period commencing on the date that the premise is available from the landlord. The lease period included the period required to make the leased space suitable for the Company. For purposes of calculating straight-line rent expense, the commencement date of the lease term reflects the date the Company took possession of the building. Rent expense for all operating leases totaled approximately $2.3 million, $3.6 million and $3.3 million for the years ended December 31, 2011, 2012 and 2013, respectively.
	The new Sunnyvale, California headquarters’ facility space operating lease contract included a tenant improvement allowance of $5.3 million, which was fully utilized. As of December 31, 2012, there was a receivable balance of $1.1 million related to this tenant improvement allowance included in other current assets on the Consolidated Balance Sheets and there was no balance related to this lease as of December 31, 2013.
	The Company classifies tenant improvement allowances in its Consolidated Balance Sheets under deferred rent and amortizes them on a straight-line basis over the related lease period. Tenant improvement allowance activity is presented as part of cash flows from operating activities in the accompanying Consolidated Statements of Cash Flows. In addition, certain of the Company’s facility leases provide for a free rent period or escalating rent payments and, accordingly, the Company has straight-lined the rental payments over the respective lease terms. As of December 31, 2012 and 2013, deferred rent was $6.9 million and $7.5 million, respectively.
	In August 2012, the Company entered into an office equipment capital lease which terminates in September 2016 and in May 2013 the Company entered into an office equipment capital lease which terminates in May 2017.
	The following table summarizes the Company’s contractual obligations as of December 31, 2013. Certain of these contractual obligations are reflected on the Company’s Consolidated Balance Sheets while others are disclosed as future obligations under GAAP.


		Capital			Operating		Purchase
		Lease			Leases		Obligations
		(In thousands)
	Year ending December 31,
	2014	$	78		$	3,986	$	303
	2015		78			3,530		230
	2016		53			3,545		180
	2017		5			3,646		180
	2018		—			3,750		30
	Thereafter		—			5,537		—

	Total minimum payments		214		$	23,994	$	923

	Less: Amounts representing interest expense		(12	)

	Present value of net minimum lease payments		202
	Less: Current obligations		(78	)

	Long-term obligations	$	124


	Contingencies
	The Company includes service level commitments to its customers warranting certain levels of reliability and performance. To date, the Company has not incurred any material costs as a result of such commitments and has not accrued any material liabilities related to such obligations.

Basis_of_Presentation_and_Prin1

Basis of Presentation and Principles of Consolidation (Policies)

12 Months Ended

Dec. 31, 2013

Use of Estimates

Cash and Cash Equivalents

Short-Term Investments

Short-term Investments

Concentration of Credit Risk and Fair Value of Financial Instruments

The following table summarizes the Company’s financial assets measured at fair value on a recurring basis:

As of December 31, 2012

As of December 31, 2013

Total

Quoted Prices

Significant

Total

Quoted Prices

Significant

Fair Value

in Active

Other

Fair Value

in Active

Other

Markets for

Observable

Unobservable

Markets for

Observable

Unobservable

Identical

Inputs

Identical

Inputs

Assets

(Level 2) ⁽²⁾

(Level 3) ⁽³⁾

Assets

(Level 2) ⁽²⁾

(Level 3) ⁽³⁾

(Level 1) ⁽¹⁾

(In thousands)

Assets:

Money Market Funds ⁽⁴⁾

179,433

—

113,599

—

US Treasury Securities

—

120,037

—

-1

Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

-2

-3

-4

Significant customer information is as follows:

December 31,

2012

2013

Percentage of accounts receivable:

JPMorgan

15%

14%

ING

—

11%

Year Ended

December 31,

2011

2012

2013

Percentage of revenue:

JPMorgan

Allowance for Doubtful Accounts

Property and Equipment

Estimated

Useful Lives

in Years

Computer equipment

Computer software

Furniture, fixtures, and equipment

Leasehold improvements

life of the lease

Capital lease equipment

life of the lease

Internal Use Software

Long-Lived Assets

Deferred Sales Commissions

Comprehensive Income

Segment Information

Revenue Recognition

The Company recognizes revenue when all of the following conditions are met:

•

There is persuasive evidence of an arrangement, as evidenced by a signed contract;

•

Delivery has occurred or the service has been made available to the customer, which occurs upon completion of implementation and connectivity services and acceptance by the customer;

•

The collectability of the fees is reasonably assured; and

•

The amount of fees to be paid by the customer is fixed or determinable.

The Company generates its revenue through three primary sources: professional management, platform and other revenue.

Deferred Revenue

Cost of Revenue

Direct Response Advertising

Deferred Income Taxes

Stock-Based Compensation

Stock-based Compensation

The Company expenses RSUs over the performance period based on the fair market value of the awards at the date of grant.

The Company’s current practice is to issue new shares to settle stock option exercises and on vesting of RSUs and PSUs.

Net Income Per Common Share

Net Income per Common Share

Recent Accounting Pronouncements Adopted

There are no recent accounting pronouncements that have had or will have a material effect on our operating results or financial position.

Basis_of_Presentation_and_Prin2

Basis of Presentation and Principles of Consolidation (Tables)	12 Months Ended
	Dec. 31, 2013
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:


			As of December 31, 2012											As of December 31, 2013
			Total			Quoted Prices			Significant			Significant		Total		Quoted Prices		Significant		Significant
			Fair Value			in Active			Other			Other		Fair Value		in Active		Other		Other
						Markets for			Observable			Unobservable				Markets for		Observable		Unobservable
						Identical			Inputs			Inputs				Identical		Inputs		Inputs
						Assets			(Level 2) ⁽²⁾			(Level 3) ⁽³⁾				Assets		(Level 2) ⁽²⁾		(Level 3) ⁽³⁾
						(Level 1) ⁽¹⁾										(Level 1) ⁽¹⁾
			(In thousands)
	Assets:
	Money Market Funds ⁽⁴⁾		$	179,433		$	179,433		$	—		$	—	$	113,599	$	113,599	$	—	$	—
	US Treasury Securities		$	—		$	—		$	—		$	—	$	120,037	$	120,037	$	—	$	—

	-1	Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

	-2	Level 2: Inputs reflect quoted prices for identical assets or liabilities in markets that are not active; quoted prices for similar assets or liabilities in active markets; inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means.

	-3	Level 3: Unobservable inputs reflecting the Company’s own assumptions incorporated in valuation techniques used to determine fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available.

	-4	Included in the December 31, 2012 money market balance is $0.8 million of long-term restricted cash, which was held in a money market account pledged as collateral for letters of credit issued in connection with certain operating lease contracts. As of September 30, 2013, the Company’s bank removed the collateral requirements associated with letters of credit related to the Company’s operating facilities.
Significant Customer Information	'
	Significant customer information is as follows:


			December 31,		December 31,
			2012		2013
	Percentage of accounts receivable:
	JPMorgan		15%		14%
	ING		—		11%


			Year Ended
			December 31,
			2011			2012			2013
	Percentage of revenue:
	JPMorgan			16	%		13	%		12	%
Property and Equipment	'
	Expenditures for maintenance and repairs are charged to expense as incurred.


			Estimated
			Useful Lives
			in Years
	Computer equipment		3
	Computer software		2
	Furniture, fixtures, and equipment		5
	Leasehold improvements		life of the lease
	Capital lease equipment		life of the lease

Balance_Sheet_Items_Tables

Balance Sheet Items (Tables)	12 Months Ended
Balance Sheet Items (Tables)	Dec. 31, 2013
Cash and Cash Equivalents	'
	Cash and cash equivalents consist of the following:


		December 31,
		2012			2013
		(In thousands)
	Cash	$	2,558		$	12,404
	Money market fund		178,673			113,599

	Total cash and cash equivalents	$	181,231		$	126,003

Reconciliation Between Amortized Cost and Fair Value of Short-Term Investment	'
	A reconciliation of amortized cost and fair value of short-term investments is as follows:


		December 31,
		2013
		(In thousands)
	U.S. Treasury Securities:
	Amortized cost	$	120,027
	Gross unrecognized gains		12
	Gross unrecognized losses		(2	)

	Fair value	$	120,037

Summary of Changes to Allowance for Doubtful Accounts	'
	The following table summarizes the changes to the allowance for doubtful accounts:


		December 31,
		2011			2012			2013
		(In thousands)
	Balance, beginning of year	$	69		$	67		$	102
	Add: Provisions for doubtful accounts		152			311			448
	Less: Write-offs		(154	)		(276	)		(426	)

	Balance, end of year	$	67		$	102		$	124

Components of Property and Equipment	'
	Property and equipment consist of the following:


		December 31,
		2012			2013
		(In thousands)
	Computer equipment	$	6,373		$	8,238
	Computer software		1,453			1,684
	Furniture, fixtures and equipment		4,918			6,724
	Leasehold improvements		7,158			9,188

	Total property and equipment		19,902			25,834
	Less: Accumulated depreciation		(6,536	)		(10,561	)

	Property and equipment, net	$	13,366		$	15,273

Components of Internal Use Software	'
	Internal use software consists of the following:


		December 31,
		2012			2013
		(In thousands)
	Capitalized internal use software	$	40,845		$	44,192
	Accumulated amortization		(30,506	)		(35,662	)

	Internal use software, net	$	10,339		$	8,530

Components of Other Current Assets	'
	Other current assets consist of the following:


		December 31,
		2012			2013
		(In thousands)
	Deferred sales commissions	$	1,795		$	1,523
	Other		1,852			1,803

	Total other current assets	$	3,647		$	3,326

Accrued Compensation	'
	Accrued compensation consists of the following:


		December 31,
		2012			2013
		(In thousands)
	Accrued bonus	$	8,624		$	10,329
	Accrued vacation		2,615			2,775
	Accrued commission		667			482
	Accrued payroll		234			502
	Other		139			50

	Total accrued compensation	$	12,279		$	14,138

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
Stockholders' Equity (Tables)	Dec. 31, 2013
Schedule of Common Stock Reserved for Issuance for Stock Options and Stock Purchase Plans	'
	As of December 31, 2013, the Company has reserved the following shares of common stock for issuance in connection with:


			December 31,
			2013
	Stock options outstanding			3,918,890
	Restricted stock units outstanding			562,638
	Performance stock units outstanding			414,300
	Stock awards available for grant			2,759,230

	Total shares reserved			7,655,058

Summary of Option Activity under the 1998 Stock Plan and the 2009 Stock Incentive Plan	'
	The following table summarizes option activity under the 1998 Stock Plan and the 2009 Stock Incentive Plan:


								Weighted		Weighted
								Average		Average		Aggregate
			Number of			Exercise		Exercise		Remaining		Intrinsic
			Options			Price		Price		Term		Value
	Balance, January 1, 2011			9,741,469		$	1.00 - $17.61	$	6.49
	Granted			846,180			18.20 - 28.68		23.15
	Exercised ⁽¹⁾			(2,747,150	)		1.00 - 17.22		5.21
	Forfeited			(154,545	)		6.04 - 28.68		9.61

	Balance, December 31, 2011			7,685,954			1.00 - 28.68		8.71

	Granted			1,101,425			20.15 -26.22		24.09
	Exercised			(2,086,590	)		1.00 - 25.92		6.54
	Forfeited			(269,474	)		6.51 - 27.17		14.16

	Balance, December 31, 2012			6,431,315			2.50 - 28.68		11.83

	Granted			603,656			28.87 - 68.69		46.3
	Exercised			(2,880,561	)		2.50 - 28.87		8.48
	Forfeited			(235,520	)		7.10 - 68.69		24.42

	Balance, December 31, 2013			3,918,890		$	3.00 - $68.69	$	18.79		6.58 years	$	198,647,608

	Vested and expected to vest, December 31, 2013			3,749,450		$	3.00 - $68.69	$	18.04		6.47 years	$	192,855,120
	Exercisable, December 31, 2013			2,455,607		$	3.00 - $57.21	$	10.55		5.29 years	$	144,711,326

	-1	Exercises for the year ended December 31, 2011 include 8,732 shares, which were tendered in exchange for option exercises.
Schedule of Weighted Average Assumptions Used to Value Options Granted	'
	The following weighted average assumptions were used to value options granted:


			2011		2012	2013
	Expected life in years		6		6	6
	Risk-free interest rate		1.72%		0.98%	1.41%
	Volatility		47%		42%	36%
	Dividend yield		—		—	0.40%
Outstanding and Exercisable Options Activity	'
	The following table summarizes information about outstanding and exercisable options as of December 31, 2013:


			Options Outstanding							Options Exercisable
						Weighted
						Average		Weighted				Weighted
						Remaining		Average				Average
			Number			Contractual		Exercise		Number		Exercise
	Exercise Price		Outstanding			Life (years)		Price		Exercisable		Price
	$ 3.00 - $6.51			663,908			3.74	$	5.77		663,908	$	5.77
	$ 7.10 - $7.50			275,479			2.56		7.48		275,479		7.48
	$ 7.99 - $7.99			881,625			5.83		7.99		881,625		7.99
	$ 8.00 - $21.39			648,258			7.31		18.41		362,888		16.64
	$21.50 - $26.22			767,795			8.48		24.9		207,792		24.91
	$27.17 - $57.21			557,700			8.93		39.24		63,915		27.5
	$57.72 - $68.69			124,125			9.8		62.54		—		—

	$ 3.00 - $68.69			3,918,890			6.58	$	18.79		2,455,607	$	10.55

Restricted Stock Units Activity	'
	The following table summarizesRSU activity under the 2009 Stock Incentive Plan:


						Weighted		Weighted
						Average		Average		Aggregate
			Number of			Grant-Date		Remaining		Intrinsic
			Shares			Fair Value		Term		Value
	Balance, January 1, 2011			—		$	0
	Granted			307,750			21.39
	Vested and settled			—			0
	Forfeited			(2,290	)		21.39

	Balance, December 31, 2011			305,460			21.39

	Granted			347,190			25.59
	Vested and settled⁽¹⁾			(71,283	)		21.39
	Forfeited			(21,591	)		21.39

	Balance, December 31, 2012			559,776			24

	Granted			203,325			55.07
	Vested and settled⁽¹⁾			(152,249	)		23.8
	Forfeited			(48,214	)		26.47

	Balance, December 31, 2013			562,638		$	35.07		1.80 years	$	39,092,088

	Expected to vest, December 31, 2013			476,954		$	35.07		1.72 years	$	33,138,749

	-1	Vested and settled for the years ended December 31, 2012 and 2013 includes 26,676 shares and 57,369 shares, respectively, which were tendered in exchange for minimum tax withholdings.
Performance Stock Units Activity	'
	The following table summarizes unvested PSU activity under the 2009 Stock Incentive Plan:


						Weighted		Weighted
						Average		Average		Aggregate
			Number of			Grant-Date		Remaining		Intrinsic
			Shares			Fair Value		Term		Value
	Balance, January 1, 2013			—		$	0
	Granted			414,300			43.59
	Vested and settled			—			0
	Forfeited			—			0

	Balance, December 31, 2013			414,300		$	43.59		2.80 years	$	28,785,564

	Expected to vest, December 31, 2013			319,873		$	43.59		2.71 years	$	22,224,758
Restricted Stock Purchase Right Activity	'
	The following table summarizes restricted stock purchase right activity under the Special Restricted Plan:


						Weighted
						Average
			Number of			Exercise
			Options			Price
	Balance, January 1, 2011			175,000			4.47
	Granted			—			—
	Released ⁽¹⁾			(175,000	)		4.47
	Forfeited			—			—

	Balance, December 31, 2011			—			—


	-1	Shares released on vesting for the year ended December 31, 2011 include 70,744 shares, which were tendered in exchange for minimum tax withholding.
Schedule of Share-Based Compensation by Functional Area	'
	The following table summarizes the stock-based compensation by functional area:


			Year Ended December 31,
			2011			2012		2013
			(In thousands)
	Stock-based compensation:
	Cost of revenue		$	489		$	1,123	$	1,846
	Research and development			1,279			2,321		4,019
	Sales and marketing			1,455			2,787		4,073
	General and administrative			2,255			3,741		6,184
	Amortization of internal use software			345			400		396

	Total stock-based compensation		$	5,823		$	10,372	$	16,518

Net_Income_Per_Common_Share_Ta

Net Income Per Common Share (Tables)	12 Months Ended
Net Income Per Common Share (Tables)	Dec. 31, 2013
Computation of Basic and Diluted Net Income Per Share	'
	The following table sets forth the computation of basic and diluted net income per share attributable to holders of common stock:


		Year Ended December 31,
		2011			2012		2013
		(In thousands, except per share data)
	Numerator (basic and diluted):
	Net income	$	15,145		$	18,574	$	29,955

	Denominator (basic):
	Weighted average common shares outstanding		44,820			46,741		49,512
	Less: Weighted average unvested restricted common shares subject to repurchase		(37	)		—		—

	Net weighted average common shares outstanding		44,783			46,741		49,512

	Denominator (diluted):
	Weighted average common shares outstanding		44,783			46,741		49,512
	Dilutive stock options and awards outstanding		4,586			3,374		2,575
	Dilutive unvested restricted stock units		1			96		242
	Dilutive unvested performance stock units		—			—		6
	Weighted average unvested restricted common shares subject to repurchase		37			—		—

	Net weighted average common shares outstanding		49,407			50,211		52,335

	Net income per share attributable to holders of common stock:
	Basic	$	0.34		$	0.4	$	0.61
	Diluted	$	0.31		$	0.37	$	0.57
Anti-dilutive Common Equivalent Shares	'
	Diluted net income per share does not include the effect of the following anti-dilutive common equivalent shares:


		2011			2012		2013
		(In thousands)
	Stock options outstanding		326			1,027		285
	Restricted stock units outstanding		—			37		19
	Performance stock units outstanding		—			—		20

	Total anti-dilutive common equivalent shares		326			1,064		324

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2013
Schedule of Components of Provision for Income Tax Expense (Benefit)	'
	The Company is subject to income taxes only in the United States. Provision for income tax expense consists of the following:


		Year Ended December 31,
		2011			2012			2013
		(In thousands)
	Current expense:
	Federal	$	33		$	2		$	857
	State		1,301			2,325			3,278

	Total current	$	1,334		$	2,327		$	4,135

	Deferred expense:
	Federal	$	6,944		$	9,018		$	13,126
	State		(378	)		(370	)		(2,275	)

	Total deferred	$	6,566		$	8,648		$	10,851

	Total provision for income taxes	$	7,900		$	10,975		$	14,986

Schedule of Difference Between Income Tax Expense (Benefit) and Federal Statutory Rate	'
	The difference between income tax expense and the amount resulting from applying the federal statutory rate of 35% to net income is attributable to the following:


		Year Ended December 31,
		2011			2012			2013
	Federal tax at statutory rate		35	%		35	%		35	%
	State taxes, net of federal benefit		4.1			4.4			4.7
	Nondeductible expenses		0.2			0.2			0.1
	Stock-based compensation		0.1			(2.0	)		(2.2	)
	Research and development credit		(4.8	)		(0.8	)		(1.6	)
	Change in valuation allowance		(0.7	)		0			(2.5	)
	Other		0.4			0.3			(0.2	)

	Income tax expense		34.3	%		37.1	%		33.3	%

Components of Deferred Tax Assets and Liabilities	'
	The components of the Company’s deferred tax assets and liabilities are as follows:


		December 31,
		2012			2013
		(In thousands)
	Deferred tax assets:
	Net operating loss carryforwards	$	25,402		$	8,668
	Tax credits		4,241			4,925
	Deferred revenue		585			433
	Stock-based compensation		6,967			9,239
	Other temporary differences		7,945			8,250

	Total gross deferred tax assets		45,140			31,515
	Valuation allowance		(1,380	)		(255	)

	Net deferred tax assets		43,760			31,260

	Deferred tax liabilities
	Fixed assets and intangibles amortization		(7,828	)		(8,907	)

	Total deferred tax liabilities		(7,828	)		(8,907	)

	Net deferred tax assets	$	35,932		$	22,353

Reconciliation of Gross Unrecognized Tax Benefits	'
	A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows:


		Year Ended December 31,
		2012			2013
		(In thousands)
	Balance, beginning of year	$	6,600		$	6,742
	Reductions for tax positions taken in the prior year		—			(170	)
	Additions for tax positions taken in the current year		142			70

	Balance, end of year	$	6,742		$	6,642

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
Commitments and Contingencies (Tables)	Dec. 31, 2013
Minimum Future Lease Payments under All Non-Cancelable Operating and Capital Leases	'
	The following table summarizes the Company’s contractual obligations as of December 31, 2013. Certain of these contractual obligations are reflected on the Company’s Consolidated Balance Sheets while others are disclosed as future obligations under GAAP.


		Capital			Operating		Purchase
		Lease			Leases		Obligations
		(In thousands)
	Year ending December 31,
	2014	$	78		$	3,986	$	303
	2015		78			3,530		230
	2016		53			3,545		180
	2017		5			3,646		180
	2018		—			3,750		30
	Thereafter		—			5,537		—

	Total minimum payments		214		$	23,994	$	923

	Less: Amounts representing interest expense		(12	)

	Present value of net minimum lease payments		202
	Less: Current obligations		(78	)

	Long-term obligations	$	124

Financial_Assets_Measured_at_F

Financial Assets Measured at Fair Value on Recurring Basis (Detail) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Money Market Funds	'		'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'		'
Fair value of financial assets measured on recurring basis	$113,599	[1]	$179,433	[1]
US Treasury Securities	'		'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'		'
Fair value of financial assets measured on recurring basis	120,037		'
Fair Value, Inputs, Level 1 \| Money Market Funds	'		'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'		'
Fair value of financial assets measured on recurring basis	113,599	[1],[2]	179,433	[1],[2]
Fair Value, Inputs, Level 1 \| US Treasury Securities	'		'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'		'
Fair value of financial assets measured on recurring basis	$120,037	[2]	'

[1]	Included in the December 31, 2012 money market balance is $0.8 million of long-term restricted cash, which was held in a money market account pledged as collateral for letters of credit issued in connection with certain operating lease contracts. As of September 30, 2013, the Company's bank removed the collateral requirements associated with letters of credit related to the Company's operating facilities.
[2]	Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Financial_Assets_Measured_at_F1

Financial Assets Measured at Fair Value on Recurring Basis (Parenthetical) (Detail) (Letters of Credit, USD $)	Dec. 31, 2012
In Millions, unless otherwise specified	Dec. 31, 2012
Letters of Credit	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'
Restricted cash being held in a money market account pledged as collateral	$0.80

Significant_Customer_Informati

Significant Customer Information (Detail)	12 Months Ended
Significant Customer Information (Detail)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
JPMorgan \| Accounts Receivable	'	'	'
Concentration Risk [Line Items]	'	'	'
Percentage of significant customer	14.00%	15.00%	'
JPMorgan \| Revenue	'	'	'
Concentration Risk [Line Items]	'	'	'
Percentage of significant customer	12.00%	13.00%	16.00%
ING \| Accounts Receivable	'	'	'
Concentration Risk [Line Items]	'	'	'
Percentage of significant customer	11.00%	'	'

Estimated_Useful_Lives_of_Prop

Estimated Useful Lives of Property and Equipment (Detail)	12 Months Ended
Estimated Useful Lives of Property and Equipment (Detail)	Dec. 31, 2013
Computer Equipment	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives in Years	'3 years
Software	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives in Years	'2 years
Furniture and Fixtures	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives in Years	'5 years
Leasehold Improvements	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives, description	'life of the lease
Capital lease equipment	'
Property, Plant and Equipment [Line Items]	'
Estimated Useful Lives, description	'life of the lease

Basis_of_Presentation_and_Prin3

Basis of Presentation and Principles of Consolidation - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Segment	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]	'	'	'
Capitalized development costs, including interest and stock compensation expense	$4,600,000	$5,700,000	$5,500,000
Capitalized stock-based compensation for internal use software	271,000	353,000	293,000
Capitalized sales commission	1,200,000	1,400,000	2,600,000
Amortized deferred sales commission	1,869,000	1,932,000	1,423,000
Number of reportable segment	1	'	'
Average life of sponsor contracts, maximum, years	'7 years	'	'
Direct response advertising costs amortization period, years	'3 years	'	'
Capitalized direct response advertising costs	5,500,000	6,600,000	7,000,000
Advertising expense	6,400,000	5,900,000	3,600,000
Performance Stock Units	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Number of vesting periods	2	'	'
Performance Stock Units \| Cliff vesting on December 31, 2015	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Percentage of eligibility of stock vesting	60.00%	'	'
Performance Stock Units \| Cliff vesting on December 31, 2017	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Percentage of eligibility of stock vesting	40.00%	'	'
Direct Response Advertising Amortization	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Advertising expense	$6,000,000	$5,200,000	$2,800,000
Minimum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Deferred sales commissions amortization period, years	'3 years	'	'
Minimum \| Performance Stock Units	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Target vesting percentage	0.00%	'	'
Maximum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Deferred sales commissions amortization period, years	'5 years	'	'
Maximum \| Performance Stock Units	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Target vesting percentage	140.00%	'	'
Internal Use Software \| Minimum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Internal use software useful life, years	'2 years	'	'
Internal Use Software \| Maximum	'	'	'
Significant Accounting Policies [Line Items]	'	'	'
Internal use software useful life, years	'4 years	'	'

Cash_and_Cash_Equivalents_Deta

Cash and Cash Equivalents (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash and Cash Equivalents [Line Items]	'	'	'	'
Cash	$12,404	$2,558	'	'
Money market fund	113,599	178,673	'	'
Total cash and cash equivalents	$126,003	$181,231	$145,002	$114,937

Reconciliation_Between_Amortiz

Reconciliation Between Amortized Cost and Fair Value of Short-Term Investments (Detail) (US Treasury Securities, USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
US Treasury Securities	'
Schedule of Held-to-maturity Securities [Line Items]	'
Amortized cost	$120,027
Gross unrecognized gains	12
Gross unrecognized losses	-2
Fair value	$120,037

Allowance_for_Doubtful_Account

Allowance for Doubtful Accounts (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'
Balance, beginning of year	$102	$67	$69
Add: Provisions for doubtful accounts	448	311	152
Less: Write-offs	-426	-276	-154
Balance, end of year	$124	$102	$67

Components_of_Property_and_Equ

Components of Property and Equipment (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]	'	'
Computer equipment	$8,238	$6,373
Computer software	1,684	1,453
Furniture, fixtures and equipment	6,724	4,918
Leasehold improvements	9,188	7,158
Total property and equipment	25,834	19,902
Less: Accumulated depreciation	-10,561	-6,536
Property and equipment, net	$15,273	$13,366

Balance_Sheet_Items_Additional

Balance Sheet Items - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]	'	'	'
Depreciation and amortization expense	$4,024,000	$3,084,000	$2,191,000
Original costs	25,834,000	19,902,000	'
Accumulated depreciation on the leased assets	10,561,000	6,536,000	'
Adjusted down of internal use software	1,200,000	6,200,000	'
Capital lease equipment	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'
Original costs	300,000	'	'
Accumulated depreciation on the leased assets	$100,000	'	'

Components_of_Internal_Use_Sof

Components of Internal Use Software (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Balance Sheet Components [Line Items]	'	'
Capitalized computer software	$1,684	$1,453
Internal use software, net	8,530	10,339
Internal Use Software	'	'
Balance Sheet Components [Line Items]	'	'
Capitalized computer software	44,192	40,845
Accumulated amortization	-35,662	-30,506
Internal use software, net	$8,530	$10,339

Components_of_Other_Current_As

Components of Other Current Assets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Balance Sheet Components [Abstract]	'	'
Deferred sales commissions	$1,523	$1,795
Other	1,803	1,852
Total other current assets	$3,326	$3,647

Components_of_Accrued_Compensa

Components of Accrued Compensation (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Balance Sheet Components [Abstract]	'	'
Accrued bonus	$10,329	$8,624
Accrued vacation	2,775	2,615
Accrued commission	482	667
Accrued payroll	502	234
Other	50	139
Total accrued compensation	$14,138	$12,279

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail) (USD $)

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Apr. 30, 2010

Dec. 31, 2013

Apr. 30, 2010

Dec. 31, 2013

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Feb. 11, 2014

Restricted Stock Units (RSUs)

Performance Stock Units

Stock Option Plan Nineteen Ninety Eight

Stock Incentive Plan 2009

Special Executive Restricted Stock Purchase Plan

Stock Awards Available For Grant

Stock Option Plans

Subsequent Event

Stock Plan Expire

Maximum

Event

First Anniversary Of Grant Date

Vesting Month After First Anniversary

Vesting Scenario One

Vesting Scenario Two

Minimum

Maximum

Stock Options

Minimum

Maximum

Common stock, shares authorized

500,000,000

Common stock, shares issued

50,890,000

47,915,000

Common stock, shares outstanding

50,890,000

47,915,000

Dividend declared per share of common stock outstanding

$0.20

$0.06

Dividends to be paid date

4-Apr-14

Dividend payable record date

21-Mar-14

Dividend payable

$2,540,000

Dividends paid date

'2014-01

Common stock shares reserved for future issuance

1,942,638

2,341,765

Stock purchase rights expiration period, days

'30 days

Stock purchase rights

'Stock purchase rights have a 30-day expiration period, and options expire no later than 10 years from the date of grant

Options maximum exercise period upon termination, months

'3 months

Options expiration period

'10 years

Stock repurchase rights termination date

'60 days

Options vesting period

'4 years

'3 years

'7 years

Shares subject to repurchase

Options granted vesting percentage

25.00%

2.08%

0.00%

140.00%

RSU vesting period

'4 years

RSU granted vesting percentage

25.00%

Options granted vesting description

'Options granted will generally vest over a period of four years with 25% vesting on the first anniversary of the grant date and 1/48 vesting per month thereafter.

Number of stock vesting cliffs

Percentage of eligibility of stock vesting

60.00%

40.00%

Eligibility of stock vesting date

31-Dec-15

31-Dec-17

Grants provide for partial acceleration in event of involuntary termination, period

'12 months

Number of shares reserved for future grant

7,655,058

562,638

414,300

2,759,230

2009 Stock Incentive Plan expiration Month and Year

'2019-11

Fair value of common stock

$69.48

Intrinsic value of options exercised

105,600,000

44,200,000

47,000,000

Weighted average fair value per share of options granted

$16.45

$9.85

$10.65

Cash received from employees for stock option exercises

24,400,000

13,600,000

14,100,000

Total fair value of shares vested

3,600,000

1,500,000

6,900,000

7,500,000

5,500,000

Unrecognized compensation cost

11,200,000

6,200,000

9,200,000

Weighted average recognition period of unrecognized compensation cost, years

'2 years 4 months 24 days

'2 years 9 months 18 days

'1 year 4 months 24 days

Intrinsic value of unvested stock units

39,100,000

Intrinsic value of RSU vested

9,000,000

2,000,000

Restrictions lapse period

'6 months

'12 months

Shares subject to repurchase

Amortization of deferred compensation

36,000

Recognized income tax benefit on stock-based compensation

$6,900,000

$3,800,000

$1,500,000

Shares_of_Common_Stock_Reserve

Shares of Common Stock Reserved for Issuance (Detail)	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total shares reserved	7,655,058
Stock Options Outstanding	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total shares reserved	3,918,890
Restricted Stock Units (RSUs)	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total shares reserved	562,638
Performance Stock Units	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total shares reserved	414,300
Stock Awards Available For Grant	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Total shares reserved	2,759,230

Summary_of_Stock_Option_Activi

Summary of Stock Option Activity (Detail) (USD $)	12 Months Ended
Summary of Stock Option Activity (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'		'
Number of Options, Beginning Balance	6,431,315	7,685,954	9,741,469		'
Exercise Price, Lower Limit	$3	$2.50	$1		$1
Number of Options Granted	603,656	1,101,425	846,180		'
Exercise Price, Upper Limit	$68.69	$28.68	$28.68		$17.61
Number of Options Exercised	-2,880,561	-2,086,590	-2,747,150	[1]	'
Number of Options Forfeited	-235,520	-269,474	-154,545		'
Number of Options, Ending Balance	3,918,890	6,431,315	7,685,954		9,741,469
Options Outstanding, Weighted Average Exercise Price, Beginning Balance	$11.83	$8.71	$6.49		'
Number of Options Vested and expected to vest	3,749,450	'	'		'
Number of Options, Exercisable	2,455,607	'	'		'
Options Granted, Weighted Average Exercise Price	$46.30	$24.09	$23.15		'
Options Exercised, Weighted Average Exercise Price	$8.48	$6.54	$5.21	[1]	'
Options Forfeited, Weighed Average Exercise Price	$24.42	$14.16	$9.61		'
Options Outstanding, Weighted Average Exercise Price, Ending Balance	$18.79	$11.83	$8.71		$6.49
Option Vested and expected to vest,Weighted Average Exercise Price	$18.04	'	'		'
Option Exercisable,Weighted Average Exercisable Price	$10.55	'	'		'
Options Outstanding, Weighted Average Remaining Term	'6 years 6 months 29 days	'	'		'
Options Vested and expected to vest,Weighted Average Remaining Term	'6 years 5 months 19 days	'	'		'
Options Exercisable, Weighted Average Remaining Term	'5 years 3 months 15 days	'	'		'
Options Outstanding, Aggregate Intrinsic Value	$198,647,608	'	'		'
Options Vested and expected to vest, Aggregate Intrinsic Value	192,855,120	'	'		'
Options Exercisable, Aggregate Intrinsic Value	$144,711,326	'	'		'
Granted	'	'	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'		'
Exercise Price, Lower Limit	$28.87	$20.15	$18.20		'
Exercise Price, Upper Limit	$68.69	$26.22	$28.68		'
Exercised	'	'	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'		'
Exercise Price, Lower Limit	$2.50	$1	$1	[1]	'
Exercise Price, Upper Limit	$28.87	$25.92	$17.22	[1]	'
Forfeited	'	'	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'		'
Exercise Price, Lower Limit	$7.10	$6.51	$6.04		'
Exercise Price, Upper Limit	$68.69	$27.17	$28.68		'
Vested and Expected to Vest	'	'	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'		'
Exercise Price, Lower Limit	$3	'	'		'
Exercise Price, Upper Limit	$68.69	'	'		'
Options Exercisable	'	'	'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'		'
Exercise Price, Lower Limit	$3	'	'		'
Exercise Price, Upper Limit	$57.21	'	'		'

[1]	Exercises for the year ended December 31, 2011 include 8,732 shares, which were tendered in exchange for option exercises.

Summary_of_Stock_Option_Activi1

Summary of Stock Option Activity (Parenthetical) (Detail)	12 Months Ended
Summary of Stock Option Activity (Parenthetical) (Detail)	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Shares tendered in exchange for options exercises	8,732

Weighted_Average_Assumptions_T

Weighted Average Assumptions To Value Options Granted (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected life in years	'6 years	'6 years	'6 years
Risk-free interest rate	1.41%	0.98%	1.72%
Volatility	36.00%	42.00%	47.00%
Dividend yield	0.40%	'	'

Summary_of_Outstanding_and_Exe

Summary of Outstanding and Exercisable Options (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$3	$2.50	$1	$1
Exercise Price, Upper Limit	$68.69	$28.68	$28.68	$17.61
Number Outstanding	3,918,890	'	'	'
Weighted Average Remaining Contractual Life (years)	'6 years 6 months 29 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$18.79	'	'	'
Number Exercisable	2,455,607	'	'	'
Weighted Average Exercise Price, Options Exercisable	$10.55	'	'	'
$3.00 - $6.51	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$3	'	'	'
Exercise Price, Upper Limit	$6.51	'	'	'
Number Outstanding	663,908	'	'	'
Weighted Average Remaining Contractual Life (years)	'3 years 8 months 27 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$5.77	'	'	'
Number Exercisable	663,908	'	'	'
Weighted Average Exercise Price, Options Exercisable	$5.77	'	'	'
$7.10 - $7.50	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$7.10	'	'	'
Exercise Price, Upper Limit	$7.50	'	'	'
Number Outstanding	275,479	'	'	'
Weighted Average Remaining Contractual Life (years)	'2 years 6 months 22 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$7.48	'	'	'
Number Exercisable	275,479	'	'	'
Weighted Average Exercise Price, Options Exercisable	$7.48	'	'	'
$7.99 - $7.99	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$7.99	'	'	'
Exercise Price, Upper Limit	$7.99	'	'	'
Number Outstanding	881,625	'	'	'
Weighted Average Remaining Contractual Life (years)	'5 years 9 months 29 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$7.99	'	'	'
Number Exercisable	881,625	'	'	'
Weighted Average Exercise Price, Options Exercisable	$7.99	'	'	'
$8.00 - $21.39	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$8	'	'	'
Exercise Price, Upper Limit	$21.39	'	'	'
Number Outstanding	648,258	'	'	'
Weighted Average Remaining Contractual Life (years)	'7 years 3 months 22 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$18.41	'	'	'
Number Exercisable	362,888	'	'	'
Weighted Average Exercise Price, Options Exercisable	$16.64	'	'	'
$21.50 - $26.22	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$21.50	'	'	'
Exercise Price, Upper Limit	$26.22	'	'	'
Number Outstanding	767,795	'	'	'
Weighted Average Remaining Contractual Life (years)	'8 years 5 months 23 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$24.90	'	'	'
Number Exercisable	207,792	'	'	'
Weighted Average Exercise Price, Options Exercisable	$24.91	'	'	'
$27.17 - $57.21	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$27.17	'	'	'
Exercise Price, Upper Limit	$57.21	'	'	'
Number Outstanding	557,700	'	'	'
Weighted Average Remaining Contractual Life (years)	'8 years 11 months 5 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$39.24	'	'	'
Number Exercisable	63,915	'	'	'
Weighted Average Exercise Price, Options Exercisable	$27.50	'	'	'
$57.72 - $68.69	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'
Exercise Price, Lower Limit	$57.72	'	'	'
Exercise Price, Upper Limit	$68.69	'	'	'
Number Outstanding	124,125	'	'	'
Weighted Average Remaining Contractual Life (years)	'9 years 9 months 18 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$62.54	'	'	'

Summary_of_Restricted_Stock_Un

Summary of Restricted Stock Units Activity (Detail) (Restricted Stock Units (RSUs), USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Restricted Stock Units (RSUs)	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Number of shares, Beginning balance	559,776		305,460		'
Restricted Stock Units, Granted	203,325		347,190		307,750
Restricted Stock Units, Vested and settled	-152,249	[1]	-71,283	[1]	'
Restricted Stock Units, Forfeited	-48,214		-21,591		-2,290
Number of shares, Ending balance	562,638		559,776		305,460
Unvested Shares Weighted Average Grant-Date Fair Value, Beginning balance	$24		$21.39		$0
Number of unvested restricted stock units Expected to vest	476,954		'		'
Restricted Stock Units Granted, Weighted Average Exercise Price	$55.07		$25.59		$21.39
Restricted Stock Units Vested and settled, Weighted Average Exercise Price	$23.80	[1]	$21.39	[1]	$0
Restricted Stock Units Forfeited, Weighted Average Exercise Price	$26.47		$21.39		$21.39
Unvested Shares Weighted Average Grant-Date Fair Value, Ending Balance	$35.07		$24		$21.39
Unvested Restricted Stock Units expected to vest, Weighted Average Grant-Date Fair Value	$35.07		'		'
Restricted Stock Units Weighted Average Remaining Term	'1 year 9 months 18 days		'		'
Unvested Restricted Stock Units expected to vest, Weighted Average Remaining Term	'1 year 8 months 19 days		'		'
Restricted Stock Units Outstanding, Aggregate Intrinsic Value	$39,092,088		'		'
Unvested Restricted Stock Units Expected to vest, Aggregate Intrinsic Value	$33,138,749		'		'

[1]	Vested and settled for the years ended December 31, 2012 and 2013 includes 26,676 shares and 57,369 shares, respectively, which were tendered in exchange for minimum tax withholdings.

Summary_of_Restricted_Stock_Un1

Summary of Restricted Stock Units Activity (Parenthetical) (Detail) (Restricted Stock Units (RSUs))	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Units (RSUs)	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Shares Paid for Tax Withholding for Share Based Compensation	57,369	26,676

Summary_of_Performance_Stock_U

Summary of Performance Stock Unit Information (Detail) (Performance Stock Units, USD $)	12 Months Ended
	Dec. 31, 2013
Performance Stock Units	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of shares, Beginning balance	'
Number of shares, Granted	414,300
Number of restricted stock, Released	'
Number of shares, Forfeited	'
Number of shares, Ending balance	414,300
Number of shares, Expected to vest	319,873
Unvested Shares Weighted Average Grant-Date Fair Value, Beginning balance	$0
Weighted Average Grant-Date Fair Value, Granted	$43.59
Weighted Average Grant-Date Fair Value, Vested and settled	$0
Weighted Average Grant-Date Fair Value, Forfeited	$0
Unvested Shares Weighted Average Grant-Date Fair Value, Ending Balance	$43.59
Weighted Average Grant-Date Fair Value, Expected to vest	$43.59
Weighted Average Remaining Term, Balance	'2 years 9 months 18 days
Weighted Average Remaining Term, Expected to vest	'2 years 8 months 16 days
Aggregate Intrinsic Value, Balance	$28,785,564
Aggregate Intrinsic Value, Expected to vest	$22,224,758

Restricted_Stock_Purchase_Righ

Restricted Stock Purchase Right Activity Under Special Restricted Plan (Detail) (Special Executive Restricted Stock Purchase Plan, USD $)	12 Months Ended
	Dec. 31, 2011
Special Executive Restricted Stock Purchase Plan	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of shares, Beginning balance	175,000
Number of restricted stock, Granted	'
Number of restricted stock, Released	-175,000	[1]
Number of restricted stock, Forfeited	'
Unvested Shares Weighted Average Grant-Date Fair Value, Beginning balance	$4.47
Restricted stock Granted, Weighted Average Exercise Price	'
Restricted stock Released, Weighted Average Exercise Price	$4.47	[1]
Restricted stock Forfeited, Weighed Average Exercise Price	'

[1]	Shares released on vesting for the year ended December 31, 2011 include 70,744 shares, which were tendered in exchange for minimum tax withholding.

Restricted_Stock_Purchase_Righ1

Restricted Stock Purchase Right Activity Under Special Restricted Plan (Parenthetical) (Detail) (Special Executive Restricted Stock Purchase Plan)	12 Months Ended
	Dec. 31, 2011
Special Executive Restricted Stock Purchase Plan	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Released on vesting and tendered in exchange for minimum tax withholding	70,744

StockBased_Compensation_by_Fun

Stock-Based Compensation by Functional Area (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation	$16,518	$10,372	$5,823
Cost of revenue	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation	1,846	1,123	489
Research and development	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation	4,019	2,321	1,279
Sales and marketing	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation	4,073	2,787	1,455
General and administrative	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation	6,184	3,741	2,255
Amortization of Internal Use Software	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Total stock-based compensation	$396	$400	$345

Computation_of_Basic_and_Dilut

Computation of Basic and Diluted Net Income Per Share (Detail) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Numerator (basic and diluted):	'	'	'
Net income	$29,955	$18,574	$15,145
Denominator (basic):	'	'	'
Weighted average common shares outstanding	49,512	46,741	44,820
Less: Weighted average unvested restricted common shares subject to repurchase	'	'	-37
Net weighted average common shares outstanding	49,512	46,741	44,783
Denominator (diluted):	'	'	'
Weighted average common shares outstanding	49,512	46,741	44,783
Weighted average unvested restricted common shares subject to repurchase	'	'	37
Net weighted average common shares outstanding (diluted)	52,335	50,211	49,407
Net income per share attributable to holders of common stock:	'	'	'
Basic	$0.61	$0.40	$0.34
Diluted	$0.57	$0.37	$0.31
Stock Options Outstanding	'	'	'
Denominator (diluted):	'	'	'
Incremental common shares included in the diluted EPS calculation	2,575	3,374	4,586
Restricted Stock Units (RSUs)	'	'	'
Denominator (diluted):	'	'	'
Incremental common shares included in the diluted EPS calculation	242	96	1
Performance Stock Units	'	'	'
Denominator (diluted):	'	'	'
Incremental common shares included in the diluted EPS calculation	6	'	'

Antidilutive_Common_Equivalent

Anti-dilutive Common Equivalent Shares (Detail)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Anti-dilutive common equivalent shares	324	1,064	326
Stock Options Outstanding	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Anti-dilutive common equivalent shares	285	1,027	326
Restricted Stock Units (RSUs)	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Anti-dilutive common equivalent shares	19	37	'
Performance Stock Units	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Anti-dilutive common equivalent shares	20	'	'

Provision_for_Income_Tax_Expen

Provision for Income Tax Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Provision For Income Taxes [Line Items]	'	'	'
Current expense, Federal	$857	$2	$33
Current expense, State	3,278	2,325	1,301
Total Current	4,135	2,327	1,334
Deferred expense, Federal	13,126	9,018	6,944
Deferred expense, State	-2,275	-370	-378
Total Deferred	10,851	8,648	6,566
Total provision for income taxes	$14,986	$10,975	$7,900

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]	'	'	'
Federal statutory tax rate	35.00%	35.00%	35.00%
Valuation allowance on deferred tax assets	$255,000	$1,380,000	'
Federal related deferred tax assets	15,400,000	'	'
State related net deferred tax assets	6,900,000	'	'
Unrecognized tax benefits that would affect the effective tax rate if recognized	5,100,000	'	'
Minimum	'	'	'
Income Taxes [Line Items]	'	'	'
Completed Federal Tax Examination	'2006	'	'
Maximum	'	'	'
Income Taxes [Line Items]	'	'	'
Completed Federal Tax Examination	'2007	'	'
Additional paid-in capital	'	'	'
Income Taxes [Line Items]	'	'	'
Income tax associated with stock-based compensation	1,200,000	2,000,000	1,000,000
Federal Research Credit	'	'	'
Income Taxes [Line Items]	'	'	'
Federal research credit carryforwards expire	'Expire through 2033	'	'
Internal Revenue Service (IRS)	'	'	'
Income Taxes [Line Items]	'	'	'
Future pre-tax income needed to realize the deferred tax assets	44,100,000	'	'
Net Operating loss carryforwards	194,300,000	'	'
Net operating loss carryforwards expire through	'Expire through 2033	'	'
Research credit carryforwards	5,500,000	'	'
Internal Revenue Service (IRS) \| Excess Stock Based Compensation	'	'	'
Income Taxes [Line Items]	'	'	'
Net Operating loss carryforwards	175,200,000	'	'
State of California	'	'	'
Income Taxes [Line Items]	'	'	'
Valuation allowance on deferred tax assets	300,000	'	'
Change in valuation allowance	1,100,000	'	'
Future pre-tax income needed to realize the deferred tax assets	61,500,000	'	'
Net Operating loss carryforwards	67,500,000	'	'
Net operating loss carryforwards expire through	'Expire through 2033	'	'
Research credit carryforwards	7,700,000	'	'
State of California \| Excess Stock Based Compensation	'	'	'
Income Taxes [Line Items]	'	'	'
Net Operating loss carryforwards	$33,100,000	'	'

Difference_Between_Income_Tax_

Difference Between Income Tax Expense and Amount Resulting From Applying Federal Statutory Rate (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income tax reconciliation	'	'	'
Federal tax at statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal benefit	4.70%	4.40%	4.10%
Nondeductible expenses	0.10%	0.20%	0.20%
Stock-based compensation	-2.20%	-2.00%	0.10%
Research and development credit	-1.60%	-0.80%	-4.80%
Change in valuation allowance	-2.50%	0.00%	-0.70%
Other	-0.20%	0.30%	0.40%
Income tax expense	33.30%	37.10%	34.30%

Components_of_Companys_Deferre

Components of Company's Deferred Tax Assets and Liabilities (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Components Of Deferred Tax Assets And Liabilities [Line Items]	'	'
Net operating loss carryforwards	$8,668	$25,402
Tax credits	4,925	4,241
Deferred revenue	433	585
Stock-based compensation	9,239	6,967
Other temporary differences	8,250	7,945
Total gross deferred tax assets	31,515	45,140
Valuation allowance	-255	-1,380
Net deferred tax assets	31,260	43,760
Fixed assets and intangibles amortization	-8,907	-7,828
Total deferred tax liabilities	-8,907	-7,828
Net deferred tax assets	$22,353	$35,932

Reconciliation_Of_Unrecognized

Reconciliation Of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of unrecognized tax benefit	'	'
Balance, beginning of year	$6,742	$6,600
Reductions for tax positions taken in the prior year	-170	'
Additions for tax positions taken in the current year	70	142
Balance, end of year	$6,642	$6,742

Savings_Plan_Additional_Inform

Savings Plan - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Percentage of defined benefit plan of employees contribution under statutory limit	75.00%	'	'
Percentage of defined benefit plan of employees contribution under statutory limit	50.00%	'	'
Percentage of employee contribution of their pre-tax salaries	3.00%	'	'
Defined benefit plan employee contribution	$1.30	$1.20	$1

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Line Items]	'	'	'
Year which last operating lease will expire	'2020	'	'
Operating leases, rent expense	$3.30	$3.60	$2.30
Tenant improvement allowance	5.3	'	'
Accrued rent	7.5	6.9	'
Other Current Assets	'	'	'
Commitments and Contingencies [Line Items]	'	'	'
Receivable related to tenant improvement allowance	$0	$1.10	'

Minimum_Future_Lease_Payments_

Minimum Future Lease Payments under All Non-Cancelable Operating and Capital Leases (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified	Dec. 31, 2013
Capital Lease	'
2014	$78
2015	78
2016	53
2017	5
2018	'
Thereafter	'
Total minimum payments	214
Less: Amounts representing interest expense	-12
Present value of net minimum lease payments	202
Less: Current obligations	-78
Long-term obligations	124
Operating Lease	'
2014	3,986
2015	3,530
2016	3,545
2017	3,646
2018	3,750
Thereafter	5,537
Total minimum payments	23,994
Purchase Obligation	'
2014	303
2015	230
2016	180
2017	180
2018	30
Thereafter	'
Total minimum payments	$923