WebMD Health (WBMD) 10-Q 8 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Aug. 04, 2014
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Entity Registrant Name	'WEBMD HEALTH CORP.	'
Entity Central Index Key	'0001326583	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	39,129,148

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$781,311	$824,880
Accounts receivable, net of allowance for doubtful accounts of $747 at June 30, 2014 and $793 at December 31, 2013	128,493	124,232
Prepaid expenses and other current assets	16,141	13,243
Deferred tax assets	13,172	13,620
Total current assets	939,117	975,975
Property and equipment, net	61,301	64,884
Goodwill	202,980	202,980
Intangible assets, net	12,699	13,834
Deferred tax assets	36,463	38,802
Other assets	26,885	29,153
TOTAL ASSETS	1,279,445	1,325,628
Current liabilities:	'	'
Accrued expenses	57,668	73,739
Deferred revenue	98,336	85,148
Liabilities of discontinued operations	1,506	1,506
Total current liabilities	157,510	160,393
Other long-term liabilities	21,235	22,103
Commitments and contingencies	'	'
Stockholders' equity:	'	'
Preferred stock, 50,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value per share, 650,000,000 shares authorized; 57,437,992 shares issued at June 30, 2014 and December 31, 2013	574	574
Additional paid-in capital	9,240,124	9,273,712
Treasury stock, at cost; 19,332,323 shares at June 30, 2014 and 18,281,498 shares at December 31, 2013	-597,047	-572,221
Accumulated deficit	-8,495,183	-8,511,165
Stockholders' equity	148,468	190,900
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,279,445	1,325,628
2.25% Convertible Notes Due 2016 [Member]	'	'
Current liabilities:	'	'
Convertible notes	252,232	252,232
2.50% Convertible Notes Due 2018 [Member]	'	'
Current liabilities:	'	'
Convertible notes	400,000	400,000
1.50% Convertible Notes Due 2020 [Member]	'	'
Current liabilities:	'	'
Convertible notes	$300,000	$300,000

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Accounts receivable, net of allowance for doubtful accounts	$747	$793
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	650,000,000	650,000,000
Common stock, shares issued	57,437,992	57,437,992
Treasury stock, Shares	19,332,323	18,281,498

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Statement [Abstract]	'	'	'	'
Revenue	$140,400	$125,317	$274,232	$238,079
Cost of operations	54,456	51,596	107,020	98,539
Sales and marketing	33,321	31,422	66,232	62,355
General and administrative	22,339	24,282	46,120	47,816
Depreciation and amortization	7,042	6,635	14,370	13,488
Interest income	17	17	32	38
Interest expense	6,172	5,832	12,344	11,664
Other expense	'	1,353	'	1,353
Income before income tax provision	17,087	4,214	28,178	2,902
Income tax provision	7,371	1,603	12,196	1,829
Net income	$9,716	$2,611	$15,982	$1,073
Net income per common share:	'	'	'	'
Basic	$0.26	$0.05	$0.41	$0.02
Diluted	$0.23	$0.05	$0.38	$0.02
Weighted-average shares outstanding used in computing per share amounts:	'	'	'	'
Basic	37,819	49,315	38,543	49,161
Diluted	45,801	50,925	46,667	50,175

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net income	$15,982	$1,073
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	14,370	13,488
Non-cash interest, net	2,256	2,163
Non-cash stock-based compensation	16,323	21,161
Deferred income taxes	2,803	856
Changes in operating assets and liabilities:	'	'
Accounts receivable	-4,261	2,829
Prepaid expenses and other, net	-2,668	-3,060
Accrued expenses and other long-term liabilities	-16,015	-10,665
Deferred revenue	13,188	6,149
Net cash provided by operating activities	41,978	33,994
Cash flows from investing activities:	'	'
Purchases of property and equipment	-11,446	-7,367
Net cash used in investing activities	-11,446	-7,367
Cash flows from financing activities:	'	'
Proceeds from exercise of stock options	30,147	10,340
Cash used for withholding taxes due on stock-based awards	-10,339	-1,745
Purchases of treasury stock	-102,353	-1,281
Excess tax benefit on stock-based awards	8,444	363
Net cash (used in) provided by financing activities	-74,101	7,677
Net (decrease) increase in cash and cash equivalents	-43,569	34,304
Cash and cash equivalents at beginning of period	824,880	991,835
Cash and cash equivalents at end of period	$781,311	$1,026,139

Summary_of_Significant_Account

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	1.    Summary of Significant Accounting Policies
	Background
	WebMD Health Corp. (the “Company” or “WebMD”) is a Delaware corporation that was incorporated on May 3, 2005. The Company completed an initial public offering on September 28, 2005. The Company’s Common Stock trades under the symbol “WBMD” on the Nasdaq Global Select Market. From the completion of the initial public offering through the completion of the Company’s merger with HLTH Corporation (“HLTH”) on October 23, 2009 (the “Merger”), the Company was more than 80% owned by HLTH. On October 23, 2009, the Merger was completed, with HLTH merging into WebMD and WebMD continuing as the surviving corporation.
	The Company provides health information services to consumers, physicians and other healthcare professionals, private and governmental employers and health plans through its public and private online portals, mobile platforms and health-focused publications. The WebMD Health Network includes: www.WebMD.com, the Company’s primary public portal for consumers and related mobile services; www.Medscape.com, the Company’s primary public portal for physicians and other healthcare professionals and related mobile services; and other sites through which the Company provides branded content. The Company’s services for consumers enable them to obtain information on health and wellness topics or on a particular disease or condition, to assess their personal health status, to use online trackers, tools and quizzes, to locate physicians, to receive periodic e-mailed newsletters and alerts on topics of individual interest, and to participate in online communities with peers and experts. The Company’s services for physicians and healthcare professionals make it easier for them to access clinical reference sources, stay abreast of the latest clinical information, learn about new treatment options, earn continuing medical education (“CME”) credit and communicate with peers. The Company does not charge any usage, membership or download fees for access to its public portals or mobile platforms. The Company generates revenue from its public portals and mobile platforms primarily through the sale of various types of advertising and sponsorship programs to its clients, which include: pharmaceutical, biotechnology and medical device companies; hospitals, clinics and other healthcare services companies; health insurance providers; consumer products companies whose products or services relate to health, wellness, diet, fitness, lifestyle, safety and illness prevention; and various other businesses, organizations and governmental entities. Advertisers and sponsors use the Company’s services to reach, educate and inform target audiences of consumers, physicians and other healthcare professionals. The Company also generates revenue from advertising sold in WebMD Magazine, a consumer magazine distributed to physician office waiting rooms. In addition, the Company generates revenue from the sale of certain information products. The Company’s private portals are a cloud-based population health management platform, hosted by the Company and provided to private and governmental employers and health plans for use by their employees and plan participants. The Company markets these private portals and related services under the WebMD Health Services brand. The WebMD Health Services platform enables employers and health plans to provide their employees and plan participants with access to personalized health and benefit information and decision-support tools that help them to make more informed benefit, treatment and provider decisions and motivate them to make healthier lifestyle choices. The Company also provides telephonic, online and onsite health coaching and targeted condition management programs for use by its private portals clients’ employees and plan participants to help them achieve their wellness goals. The Company generates revenue from subscriptions to its WebMD Health Services platform by employers and health plans, either directly or through its distributors. WebMD offers its health coaching services and its condition management programs on a per-participant basis.
	Interim Financial Statements
	The unaudited consolidated financial statements of the Company have been prepared by management and reflect all adjustments (consisting of only normal recurring adjustments) that, in the opinion of management, are necessary for a fair presentation of the interim periods presented. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the operating results to be expected for any subsequent period or for the entire year ending December 31, 2014. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted under the Securities and Exchange Commission’s rules and regulations.
	The unaudited consolidated financial statements and notes included herein should be read in conjunction with the Company’s audited consolidated financial statements and notes for the year ended December 31, 2013, which are included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission.
	Seasonality
	The timing of the Company’s revenue is affected by seasonal factors. The Company’s public portal advertising and sponsorship revenue is seasonal, primarily due to the annual spending patterns of the advertising and sponsorship clients of the Company’s public portals. This portion of the Company’s revenue is usually the lowest in the first quarter of each calendar year, and generally increases during each consecutive quarter throughout the year. The timing of revenue in relation to the Company’s expenses, many of which do not vary directly with revenue, has an impact on cost of operations, sales and marketing, and general and administrative expenses as a percentage of revenue in each calendar quarter.
	Accounting Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. The Company bases its estimates on historical experience, current business factors, and various other assumptions that the Company believes are necessary to consider to form a basis for making judgments about the carrying values of assets and liabilities, the recorded amounts of revenue and expenses, and the disclosure of contingent assets and liabilities. The Company is subject to uncertainties such as the impact of future events, economic and political factors, and changes in the Company’s business environment; therefore, actual results could differ from these estimates. Accordingly, the accounting estimates used in the preparation of the Company’s financial statements will change as new events occur, as more experience is acquired, as additional information is obtained and as the Company’s operating environment changes. Changes in estimates are made when circumstances warrant. Such changes in estimates and refinements in estimation methodologies are reflected in reported results of operations; if material, the effects of changes in estimates are disclosed in the notes to the Consolidated Financial Statements. Significant estimates and assumptions by management affect the allowance for doubtful accounts, the carrying value of long-lived assets (including goodwill and intangible assets), the amortization period of long-lived assets (excluding goodwill and indefinite-lived intangible assets), the carrying value, capitalization and amortization of software and Website development costs, the carrying value of investments, the provision for income taxes and related deferred tax accounts, certain accrued liabilities, revenue recognition, contingencies, litigation and related legal accruals and the value attributed to employee stock options and other stock-based awards.
	Presentation of Segment Information
	The Company generates its revenue through its public and private portals. Discrete financial information related to a measure of profit or loss for these two revenue streams is not available as they leverage many common expenses, and the Company does not separately allocate these common expenses in assessing the performance of its business. Accordingly, the Company views its business as one reportable operating segment.
	The following table presents the revenues recognized related to the Company’s public portals and private portals during the three and six months ended June 30, 2014 and 2013:
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Public portal advertising and sponsorship	$	116,212	$	105,783	$	225,415	$	199,221
	Private portal services		24,188		19,534		48,817		38,858
		$	140,400	$	125,317	$	274,232	$	238,079
	Loss Contingencies
	The Company accounts for loss contingencies in accordance with Financial Accounting Standards Board (“FASB”) ASC No. 450, “Contingencies.” Under ASC No. 450, accruals for loss contingencies are recorded when both (i) the information available indicates that it is probable that a liability has been incurred and (ii) the amount of the loss can be reasonably estimated. The Company records adjustments to these accruals to reflect the status of negotiations, settlements, advice of counsel and other information and events related to an individual matter.
	Net Income Per Common Share
	Basic income per common share has been computed using the weighted-average number of shares of Common Stock outstanding during the periods presented. Diluted income per common share has been computed using the weighted-average number of shares of Common Stock outstanding during the periods, increased to give effect to potentially dilutive securities and assumes that any dilutive convertible notes were converted, only in the periods in which such effect is dilutive (shares in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Numerator:
	Net income — Basic	$	9,716	$	2,611	$	15,982	$	1,073
	Interest expense on 1.50% Notes, net of tax		864		—		1,728		—
	Net income — Diluted	$	10,580	$	2,611	$	17,710	$	1,073
	Denominator:
	Weighted-average shares — Basic		37,819		49,315		38,543		49,161
	Stock options and restricted stock		2,301		1,610		2,443		1,014
	1.50% Notes		5,681		—		5,681		—
	Adjusted weighted-average shares after assumed		45,801		50,925		46,667		50,175
	conversions — Diluted
	Net income per common share:
	Basic	$	0.26	$	0.05	$	0.41	$	0.02
	Diluted	$	0.23	$	0.05	$	0.38	$	0.02
	The Company has excluded certain of its convertible notes, as well as certain outstanding stock options and restricted stock, from the calculation of diluted income per common share during the periods in which such securities were anti-dilutive. The following table presents the total weighted average number of potentially dilutive common shares that were excluded from the computation of diluted income per common share during the periods presented (shares in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Options and restricted stock		2,688		5,768		2,584		9,091
	2.50% Notes		6,191		6,129		6,191		6,129
	2.25% Notes		3,503		5,500		3,503		5,500
			12,382		17,397		12,278		20,720
	Recent Accounting Pronouncements
	In April 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies the related disclosure requirements. Under the new guidance, a discontinued operation is defined as a disposal of a component or group of components that represents a strategic shift that has, or will have, a major effect on an entity’s operations and financial results. The revised guidance is effective for the Company beginning in the quarter ending March 31, 2015; early adoption is permitted. The Company has not yet determined the impact the revised guidance will have on its consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), to achieve a consistent application of revenue recognition within the U.S., resulting in a single revenue model to be applied by reporting companies under U.S. generally accepted accounting principles. Under the new model, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, the new standard requires that reporting companies disclose the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The new standard is effective for the Company beginning in the quarter ending March 31, 2017; early adoption is prohibited. The new standard is required to be applied retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying it recognized at the date of initial application. The Company has not yet determined the impact of the new standard on its consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period, which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The new standard is effective for the Company beginning in the quarter ending March 31, 2016; early adoption is permitted. The Company has not yet determined the impact the revised guidance will have on its consolidated financial statements.

Convertible_Notes

Convertible Notes	6 Months Ended
	Jun. 30, 2014
Debt Disclosure [Abstract]	'
Convertible Notes	'
	2.    Convertible Notes
	2.50% Convertible Notes due 2018
	On January 11, 2011, the Company issued $400,000 aggregate principal amount of its 2.50% Convertible Notes due 2018 (the “2.50% Notes”) in a private offering. Unless previously converted, the 2.50% Notes will mature on January 31, 2018. Net proceeds from the sale of the 2.50% Notes were approximately $387,345, after deducting the related offering expenses, of which approximately $100,000 was used to repurchase 1,920,490 shares of the Company’s Common Stock at a price of $52.07 per share, the last reported sale price of the Company’s Common Stock on January 5, 2011, which repurchase settled on January 11, 2011. Interest on the 2.50% Notes is payable semi-annually on January 31 and July 31 of each year, commencing July 31, 2011. Under the terms of the 2.50% Notes, holders were able to surrender their 2.50% Notes for conversion into the Company’s Common Stock at an initial conversion rate of 15.1220 shares of Common Stock per thousand dollars principal amount of the 2.50% Notes. This was equivalent to an initial conversion price of approximately $66.13 per share of Common Stock. In the aggregate, the 2.50% Notes were convertible into 6,048,800 shares of the Company’s Common Stock.
	Effective April 4, 2012, after giving effect to an adjustment resulting from a tender offer for the Company’s Common Stock that the Company completed on April 3, 2012, the conversion rate was adjusted to 15.3223 shares of Common Stock per thousand dollars principal amount of the 2.50% Notes. This was equivalent to an adjusted conversion price of approximately $65.26 per share of Common Stock. In the aggregate, the 2.50% Notes were convertible into 6,128,920 shares of Common Stock following the April 4, 2012 adjustment. Effective September 11, 2013, after giving effect to an adjustment resulting from a tender offer for the Company’s Common Stock that the Company completed on September 10, 2013, the conversion rate was adjusted to 15.4764 shares of Common Stock per thousand dollars principal amount of the 2.50% Notes. This is equivalent to an adjusted conversion price of approximately $64.61 per share of Common Stock. In the aggregate, the 2.50% Notes are convertible into 6,190,560 shares of Common Stock following the September 11, 2013 adjustment.
	Under the terms of the 2.50% Notes, if the Company undergoes certain change of control transactions prior to the maturity date of the 2.50% Notes, holders of the 2.50% Notes will have the right, at their option, to require the Company to repurchase some or all of their 2.50% Notes at a repurchase price equal to 100% of the principal amount of the 2.50% Notes being repurchased, plus accrued and unpaid interest to, but excluding, the repurchase date. At the Company’s option, and to the extent permitted by the applicable rules of the Nasdaq Global Select Market (or the applicable rules of such other exchange on which the Company’s Common Stock may be listed), instead of paying the repurchase price in cash, the Company may pay the repurchase price in shares of its Common Stock or a combination of cash and shares of its Common Stock. However, in the case of certain change of control transactions in which the Company is acquired by a public company, the Company may elect to provide for conversion of the 2.50% Notes into acquirer common stock, in which case the repurchase option would not apply.
	2.25% Convertible Notes due 2016
	On March 14, 2011, the Company issued $400,000 aggregate principal amount of its 2.25% Convertible Notes due 2016 (the “2.25% Notes”) in a private offering. Unless previously converted, the 2.25% Notes will mature on March 31, 2016. Net proceeds from the sale of the 2.25% Notes were approximately $387,400, after deducting the related offering expenses, of which approximately $50,000 was used to repurchase 868,507 shares of the Company’s Common Stock at a price of $57.57 per share, the last reported sale price of the Company’s Common Stock on March 8, 2011, which repurchase settled on March 14, 2011. Interest on the 2.25% Notes is payable semi-annually on March 31 and September 30 of each year, commencing September 30, 2011. Under the terms of the 2.25% Notes, holders were able to surrender their 2.25% Notes for conversion into the Company’s Common Stock at an initial conversion rate of 13.5704 shares of Common Stock per thousand dollars principal amount of the 2.25% Notes. This was equivalent to an initial conversion price of approximately $73.69 per share of Common Stock. In the aggregate, the 2.25% Notes were convertible into 5,428,160 shares of the Company’s Common Stock.
	Effective April 4, 2012, after giving effect to an adjustment resulting from a tender offer for the Company’s Common Stock that the Company completed on April 3, 2012, the conversion rate was adjusted to 13.7502 shares of Common Stock per thousand dollars principal amount of the 2.25% Notes. This was equivalent to an adjusted conversion price of approximately $72.73 per share of Common Stock. In the aggregate, the 2.25% Notes were convertible into 5,500,080 shares of Common Stock following the April 4, 2012 adjustment. Effective September 11, 2013, after giving effect to an adjustment resulting from a tender offer for the Company’s Common Stock that the Company completed on September 10, 2013, the conversion rate was adjusted to 13.8884 shares of Common Stock per thousand dollars principal amount of the 2.25% Notes. This is equivalent to an adjusted conversion price of approximately $72.00 per share of Common Stock. In the aggregate, the 2.25% Notes were convertible into 5,555,360 shares of Common Stock following the September 11, 2013 adjustment.
	On September 30, 2013, the Company repurchased $100,000 principal amount of its 2.25% Notes for $101,750 in cash in a privately negotiated transaction. Also during the three months ended December 31, 2013, the Company repurchased $47,768 principal amount of its 2.25% Notes for $48,604 in cash in the open market. The Company recognized pre-tax losses of $3,296 and $1,575 during the three months ended September 30, 2013 and December 31, 2013, respectively, related to these repurchases. The losses include the expensing of the remaining deferred issuance costs outstanding related to the repurchased notes. As of June 30, 2014 and December 31, 2013, the remaining principal amount of the 2.25% Notes outstanding was $252,232, which, in the aggregate, is convertible into 3,503,099 shares of Common Stock.
	Under the terms of the 2.25% Notes, if the Company undergoes certain change of control transactions prior to the maturity date of the 2.25% Notes, holders of the 2.25% Notes will have the right, at their option, to require the Company to repurchase some or all of their 2.25% Notes at a repurchase price equal to 100% of the principal amount of the 2.25% Notes being repurchased, plus accrued and unpaid interest to, but excluding, the repurchase date. At the Company’s option, and to the extent permitted by the applicable rules of the Nasdaq Global Select Market (or the applicable rules of such other exchange on which the Company’s Common Stock may be listed), instead of paying the repurchase price in cash, the Company may pay the repurchase price in shares of its Common Stock or a combination of cash and shares of its Common Stock. However, in the case of certain change of control transactions in which the Company is acquired by a public company, the Company may elect to provide for conversion of the 2.25% Notes into acquirer common stock, in which case the repurchase option would not apply.
	1.50% Convertible Notes due 2020
	On November 26, 2013, the Company issued $300,000 aggregate principal amount of its 1.50% Convertible Notes due 2020 (the “1.50% Notes”) in a private offering. Unless previously converted, the 1.50% Notes will mature on December 1, 2020. Net proceeds from the sale of the 1.50% Notes were approximately $291,823, after deducting the related offering expenses. Interest on the 1.50% Notes is payable semi-annually on June 1 and December 1 of each year, commencing June 1, 2014. Under the terms of the 1.50% Notes, holders may surrender their 1.50% Notes for conversion into the Company’s Common Stock at an initial conversion rate of 18.9362 shares of Common Stock per thousand dollars principal amount of the 1.50% Notes. This is equivalent to an initial conversion price of approximately $52.81 per share of Common Stock. In the aggregate, the 1.50% Notes are convertible into 5,680,860 shares of the Company’s Common Stock. The conversion rate may be adjusted under certain circumstances.
	Under the terms of the 1.50% Notes, if the Company undergoes certain change of control or other fundamental change transactions prior to the maturity date of the 1.50% Notes, holders of the 1.50% Notes will have the right, at their option, to require the Company to repurchase some or all of their 1.50% Notes at a repurchase price equal to 100% of the principal amount of the 1.50% Notes being repurchased, plus accrued and unpaid interest to, but excluding, the repurchase date. However, the repurchase option will not apply in the case of certain change of control or other fundamental change transactions in which the Company is acquired by a public company, and (a) not less than 90% of the consideration received or to be received by holders of WebMD Common Stock, excluding cash payments for fractional shares, consists of acquirer common stock and (b) as a result of the transaction, the 1.50% Notes become convertible into the same consideration.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Fair Value of Financial Instruments	'
	3.    Fair Value of Financial Instruments
	The Company accounts for certain assets and liabilities at fair value, which is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Additionally, the Company uses valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. These inputs are prioritized below:
	Level 1:	Observable inputs such as quoted market prices in active markets for identical assets or liabilities.
	Level 2:	Observable market-based inputs or unobservable inputs that are corroborated by market data.
	Level 3:	Unobservable inputs for which there is little or no market data, which require the use of the reporting entity’s own assumptions.
	The Company did not have any Level 2 or Level 3 assets during the periods presented. The Company’s cash and cash equivalents, which were $781,311 and $824,880 as of June 30, 2014 and December 31, 2013, respectively, represented the only Level 1 assets during the periods presented that were measured and recorded at fair value on a recurring basis. The cost basis of the Company’s cash and cash equivalents was consistent with the fair value.
	The Company also holds an investment in a privately held company which is carried at cost, and not subject to fair value measurements. However, if events or circumstances indicate that its carrying amount may not be recoverable, it would be reviewed for impairment. The total amount of this investment is $6,471 and it is included in other assets on the accompanying consolidated balance sheets.
	For disclosure purposes, the Company is required to measure the outstanding value of its debt on a recurring basis. The following table presents the carrying value and estimated fair value (based on Level 1 market price data) of the Company’s convertible notes that were carried at historical cost as of June 30, 2014 and December 31, 2013:
		June 30, 2014				December 31, 2013
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
	2.25% Notes	$	252,232	$	260,276	$	252,232	$	252,863
	2.50% Notes		400,000		421,000		400,000		394,400
	1.50% Notes		300,000		335,223		300,000		294,852

Stock_Repurchase_Program

Stock Repurchase Program	6 Months Ended
	Jun. 30, 2014
Equity [Abstract]	'
Stock Repurchase Program	'
	4.    Stock Repurchase Program
	In August 2011, the Board of Directors established a stock repurchase program (the “Program”) through which the Company was authorized to use up to $75,000 to purchase shares of WebMD Common Stock, from time to time, in the open market through block trades or in private transactions, depending on market conditions and other factors. In October 2011, February 2014, March 2014 and April 2014, the Company’s Board of Directors authorized increases to the Program of $75,000, $50,000, $40,000 and $30,000, respectively. During the three and six months ended June 30, 2014, the Company repurchased 864,183 shares and 2,459,087 shares, respectively, at an aggregate cost of $34,847 and $102,353, respectively, under the Program. During the six months ended June 30, 2013, the Company repurchased 45,166 shares at an aggregate cost of $712 under the Program. No shares were repurchased under the Program during the three months ended June 30, 2013. Additionally, during the six months ended June 30, 2013, the Company paid cash of $569 related to the repurchase of 39,857 shares in 2012 that settled in 2013. As of June 30, 2014, $37,511 remained available for repurchases under the Program.

Intangible_Assets

Intangible Assets	6 Months Ended
	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Intangible Assets	'
	5.    Intangible Assets
	Intangible assets consist of the following:
			June 30, 2014									December 31, 2013
			Gross		Accumulated			Net		Weighted		Gross		Accumulated			Net		Weighted
			Carrying		Amortization					Average		Carrying		Amortization					Average
			Amount							Remaining		Amount							Remaining
										Useful Life(a)									Useful Life(a)
	Content		$	15,954	$	(15,954	)	$	—		—	$	15,954	$	(15,954	)	$	—		—
	Customer relationships			34,057		(26,081	)		7,976		4		34,057		(25,035	)		9,022		4.5
	Technology and patents			14,700		(14,700	)		—		—		14,700		(14,700	)		—		—
	Trade names-definite lives			2,530		(2,271	)		259		1.5		2,530		(2,182	)		348		2
	Trade names-indefinite lives			4,464		—			4,464		n/a		4,464		—			4,464		n/a
	Total		$	71,705	$	(59,006	)	$	12,699			$	71,705	$	(57,871	)	$	13,834
	(a)	The calculation of the weighted average remaining useful life is based on the net book value and the remaining amortization period of each respective intangible asset.
	Amortization expense was $567 and $1,135 during the three and six months ended June 30, 2014, respectively, and $568 and $1,135 during the three and six months ended June 30, 2013, respectively. Aggregate amortization expense for intangible assets is estimated to be:
	Year Ending December 31:
	2014 (July 1st to December 31st)		$	1,136
	2015		$	2,261
	2016		$	2,059
	2017		$	1,513
	2018		$	1,266

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	6.    Commitments and Contingencies
	Legal Proceedings
	National Jewish Health v. WebMD Health Services Group, Inc. and WebMD Health Corp.
	On October 25, 2012, National Jewish Health, a Colorado non-profit corporation, filed a complaint against the Company in United States District Court for the District of Colorado alleging copyright infringement, misappropriation of trade secrets, tortious interference with prospective business relations, and breach of contract. The allegations relate to a condition management program of the Company’s private portals. The complaint seeks injunctive relief, as well as damages of $8,000 to $10,000. The Court issued a Scheduling Order on February 11, 2013 and the parties completed fact discovery on August 9, 2013. The Plaintiff had filed a motion seeking to extend the discovery period that was opposed by the Company. The Court appointed a Special Master to decide the motion and the Special Master denied Plaintiff’s motion in a Report and Recommendation filed on March 24, 2014 that was adopted by the Court on March 25, 2014. Each party also filed a motion for partial summary judgment. Plaintiff sought partial summary judgment on the issue of breach of contract, alleging that the Company breached a non-disclosure agreement; and the Company sought summary judgment on the issue of damages, alleging that Plaintiff has introduced no evidence that it has suffered any damages as a result of any of the claims that it has alleged against the Company. The Court heard oral arguments on both motions on July 2, 2014 and issued an order denying both motions on July 3, 2014. On March 25, 2014, the Court held a Final Pretrial Conference and entered the parties’ proposed Final Pretrial Order. A 10-day jury trial has been set for March 2-13, 2015. The Company believes the Plaintiff’s claims are without merit and intends to vigorously defend against them. The Company is unable to predict the outcome of this action or to reasonably estimate the possible loss or range of loss, if any, arising from the claims asserted therein.
	MyMedicalRecords, Inc. v. WebMD Health Corp. and WebMD Health Services Corp.
	On February 13, 2013, MyMedicalRecords, Inc. filed an action against the Company in the United States District Court in the Central District of California. The complaint alleged that the personal health record tool sold by WebMD Health Services Group, Inc. infringes U.S. Patent No. 8,301,466 issued on October 30, 2012. The complaint sought injunctive relief, as well as damages in unspecified amounts. Pursuant to an agreement between the parties, MyMedicalRecords dismissed the complaint without prejudice in order to enable the parties to try to resolve the matter without the timing constraints of the litigation. The parties were unable to resolve the matter and, on October 2, 2013, MyMedicalRecords filed a new complaint against the Company alleging infringement of U.S. Patent No. 8,301,466 as well as U.S. Patent No. 8,498,883 issued on July 30, 2013. Plaintiff is seeking unspecified damages and an injunction with respect to certain products offered by the Company. The Company has filed an answer. The Court has consolidated Plaintiffs claim against the Company with its claims against several other companies. The Court has scheduled the claims construction hearing for August 18, 2014 and has suspended fact discovery prior to such hearing except for discovery related solely to the issue of claim construction. The Company believes that the Plaintiff’s claims are without merit. The Company is unable to predict the outcome of this action or to reasonably estimate the possible loss or range of loss, if any, arising from the claims asserted therein.
	Coverage Dispute with Stop Loss Carrier for Health Benefit Plan
	The Company sponsors and maintains a self-insured group health and prescription benefit plan (the “Health Plan”) for its eligible employees and their dependents. The Company purchases stop loss insurance coverage on an annual basis to reimburse the Company for claims that exceed certain individual and/or aggregate claim amounts under the Health Plan. On May 7, 2013, the Company was advised that the former stop loss carrier for the Health Plan, Everest Reinsurance Company (“Everest”), was attempting to deny payment for certain medical claims under the Health Plan that were pending under the 2012 stop loss policy, and to recover certain payments that had already been made under the 2011 and 2012 stop loss policies. These claims were incurred in 2011 and 2012 and had previously been approved by Horizon Blue Cross and Blue Shield of New Jersey, the third party claims administrator for the Health Plan appointed by the Company. The maximum amount of claims in dispute by Everest is approximately $4,900, of which approximately $1,965 remains unpaid by Everest. On June 27, 2013, the Company filed an action in the Supreme Court, State of New York (“New York Action”), seeking payment from Everest of the $1,965 in outstanding claims. On August 14, 2013, Everest filed an action in the Superior Court, State of New Jersey (“New Jersey Action”), against the Company, the claims administrator and the Company’s insurance broker seeking recovery of approximately $2,935 paid by Everest under the stop loss policies and seeking a declaration that the remaining $1,965 is not payable by Everest. On August 15, 2013, Everest filed a motion in the New York Action seeking to dismiss the complaint filed by the Company on forum non conveniens grounds. On October 3, 2013, the New York Action court granted the Company’s motion for a temporary restraining order and stayed the New Jersey Action pending adjudication of Everest’s motion to dismiss the New York Action and the Company’s cross motion to dismiss the New Jersey Action. A preliminary injunction hearing was held on November 7, 2013 in the New York Action, following which, the New York Action court issued orders: (i) denying Everest’s motion to dismiss (or, in the alternative, for a stay of) the New York Action; and (ii) granting the Company’s motion enjoining Everest from prosecuting the New Jersey Action pending a stipulation of the parties or further order of the court. Everest answered the New York Action complaint on or about December 9, 2013, including the assertion of counterclaims similar in content and substance to its allegations in the New Jersey Action. Everest then voluntarily dismissed the New Jersey Action on or about December 10, 2013. The parties to the New York Action are currently proceeding with discovery. The Company believes the $1,965 outstanding from Everest will be recoverable. This amount is reflected within prepaid expenses and other current assets in the accompanying consolidated balance sheets as of June 30, 2014 and December 31, 2013. Additionally, the Company believes that the $2,935 previously paid by Everest will not be repayable by the Company. Accordingly, no provision has been recorded in the accompanying financial statements related to this matter.
	Traffic Information, LLC v. WebMD LLC
	On June 25, 2014, Traffic Information, LLC filed an action against the Company in the United States District Court in the Eastern District of Texas. The complaint alleges that the Company directly infringes and has induced infringement of U.S. Patent No. 6,785,606 issued on August 31, 2004. The complaint seeks injunctive relief, as well as damages in unspecified amounts. The Company believes that the Plaintiff’s claims are without merit. The Company is unable to predict the outcome of this action or to reasonably estimate the possible loss or range of loss, if any, arising from the claims asserted therein.
	Other Legal Proceedings
	In the normal course of business, the Company and its subsidiaries are involved in various claims and legal proceedings. While the ultimate resolution of these matters, including those discussed in Note 7 to the Consolidated Financial Statements included in the Company’s 2013 Annual Report on Form 10-K, has yet to be determined, the Company does not believe that their outcomes will have a material adverse effect on the Company’s consolidated financial position, results of operations or liquidity.

StockBased_Compensation

Stock-Based Compensation	6 Months Ended
	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock-Based Compensation	'
	7.    Stock-Based Compensation
	The Company has various stock-based compensation plans (collectively, the “Plans”) that provide for the grant of stock options, restricted stock awards, and other awards based on WebMD Common Stock.
	The 2005 Long-Term Incentive Plan (as amended, the “2005 Plan”) is the only existing plan under which future grants can be made. The maximum number of shares of the Company’s Common Stock that may be subject to awards under the 2005 Plan was 21,575,000 as of June 30, 2014, subject to adjustment in accordance with the terms of the 2005 Plan. The Company had an aggregate of 768,132 shares of Common Stock available for future grants under the 2005 Plan at June 30, 2014.
	Stock Options
	Generally, options under the Plans vest and become exercisable ratably over periods ranging from two to five years based on their individual grant dates, subject to continued employment on the applicable vesting dates, and generally expire within ten years from the date of grant. Options are granted at prices not less than the fair market value of the Company’s Common Stock on the date of grant. The following table summarizes stock option activity for the Plans:
			Shares			Weighted		Weighted		Aggregate
						Average Exercise		Average		Intrinsic Value(a)
						Price Per Share		Remaining
								Contractual
								Life (In Years)
	Outstanding at January 1, 2014			11,429,279		$	29.12
	Granted			483,000			42.22
	Exercised			(1,759,129	)		26.13
	Cancelled			(657,051	)		31.72
	Outstanding at June 30, 2014			9,496,099		$	30.16		7	$	174,212
	Vested and exercisable at the end of the period			4,398,734		$	29.86		5.1	$	82,843
	(a)	The aggregate intrinsic value is based on the market price of the Company’s Common Stock on June 30, 2014, which was $48.30, less the applicable exercise price of the underlying option. This aggregate intrinsic value represents the amount that would have been realized if all the option holders had exercised their options on June 30, 2014.
	The fair value of each option granted is estimated on the date of grant using the Black-Scholes option pricing model considering the weighted average assumptions noted in the following table. Expected volatility is based on implied volatility from traded options of the Company’s Common Stock combined with historical volatility of the Company’s Common Stock. The expected term represents the period of time that options are expected to be outstanding following their grant date, and was determined using historical exercise data combined with assumptions for future exercise activity. The risk-free rate is based on the U.S. Treasury yield curve for periods equal to the expected term of the options on the grant date.
			Six Months Ended
			June 30,
			2014			2013
	Expected dividend yield			0.00%			0.00%
	Expected volatility			0.48-0.49			0.43-0.46
	Risk-free interest rate			1.28%-1.72%			0.55%-1.23%
	Expected term (years)			4.3-5.0			4.5-5.1
	Weighted-average fair value of options granted during the period		$	17.82		$	8.61
	Restricted Stock
	The Company’s Restricted Stock consists of shares of the Company’s Common Stock which have been awarded to employees with restrictions that cause them to be subject to substantial risk of forfeiture and restrict their sale or other transfer by the employee until they vest. Generally, the Company’s Restricted Stock grants vest ratably over periods ranging from three to five years from their individual award dates subject to continued employment on the applicable vesting dates. The following table summarizes the activity of the Company’s Restricted Stock:
			Shares			Weighted
						Average Grant
						Date Fair Value
	Balance at January 1, 2014			1,184,961		$	33.07
	Granted			89,500			44.41
	Vested			(226,828	)		33.44
	Forfeited			(96,625	)		29.7
	Balance at June 30, 2014			951,008		$	34.39
	Proceeds received from the exercise of options to purchase shares of the Company’s Common Stock were $12,665 and $30,147 during the three and six months ended June 30, 2014, respectively, and $9,668 and $10,340 during the three and six months ended June 30, 2013, respectively. Additionally, in connection with the exercise of certain stock options and the vesting of restricted stock, the Company made payments of $5,013 and $10,339 during the three and six months ended June 30, 2014, respectively, and $1,571 and $1,745 during the three and six months ended June 30, 2013, respectively, related to employee statutory withholding taxes that were satisfied by withholding shares of Common Stock of equal value from the respective employees. The proceeds and payments described above are reflected within cash flows from financing activities within the accompanying consolidated statements of cash flows.
	The intrinsic value related to stock options that were exercised, combined with the fair value of shares of restricted stock that vested, aggregated $19,512 and $45,495 for the three and six months ended June 30, 2014, respectively, and $5,954 and $8,675 for the three and six months ended June 30, 2013, respectively.
	Other
	Each year, the Company issues shares of its Common Stock to each WebMD non-employee director with a value equal to their annual board and committee retainers. The Company recorded $77 and $154 of stock-based compensation expense for the three and six months ended June 30, 2014, respectively, and $94 and $188 of stock-based compensation expense for the three and six months ended June 30, 2013, respectively, in connection with these issuances.
	Summary of Stock-Based Compensation Expense
	The following table summarizes the components and classification of stock-based compensation expense:
			Three Months Ended					Six Months Ended
			June 30,					June 30,
			2014			2013		2014		2013
	Stock options		$	4,953		$	7,247	$	10,419	$	13,861
	Restricted stock			2,603			3,883		5,750		7,112
	Other			77			94		154		188
	Total stock-based compensation expense		$	7,633		$	11,224	$	16,323	$	21,161
	Included in:
	Cost of operations		$	1,429		$	1,471	$	2,893	$	3,341
	Sales and marketing			1,694			1,997		3,799		4,520
	General and administrative			4,510			7,756		9,631		13,300
	Total stock-based compensation expense		$	7,633		$	11,224	$	16,323	$	21,161
	As of June 30, 2014, approximately $60,200 of unrecognized stock-based compensation expense related to unvested awards (net of estimated forfeitures) is expected to be recognized over a weighted-average period of approximately 2.9 years, related to the Plans.
	Tax benefits attributable to stock-based compensation represented 39% of stock-based compensation expense for all periods presented.

Other_Expense

Other Expense	6 Months Ended
	Jun. 30, 2014
Other Income And Expenses [Abstract]	'
Other Expense	'
	8.    Other Expense
	For the three and six months ended June 30, 2013, other expense consisted of cash severance and related expenses due to the May 2013 departure of a Chief Executive Officer of the Company.

Subsequent_Event

Subsequent Event	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Event	'
	9.    Subsequent Event
	On August 5, 2014, the Company announced its intention to commence a tender offer to purchase up to 2,000,000 shares of its Common Stock at a price of $48.50 per share. The tender offer is expected to commence within approximately one week of that announcement and to be open for 20 business days from the commencement, subject to a number of terms and conditions.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Background	'
	Background
	WebMD Health Corp. (the “Company” or “WebMD”) is a Delaware corporation that was incorporated on May 3, 2005. The Company completed an initial public offering on September 28, 2005. The Company’s Common Stock trades under the symbol “WBMD” on the Nasdaq Global Select Market. From the completion of the initial public offering through the completion of the Company’s merger with HLTH Corporation (“HLTH”) on October 23, 2009 (the “Merger”), the Company was more than 80% owned by HLTH. On October 23, 2009, the Merger was completed, with HLTH merging into WebMD and WebMD continuing as the surviving corporation.
	The Company provides health information services to consumers, physicians and other healthcare professionals, private and governmental employers and health plans through its public and private online portals, mobile platforms and health-focused publications. The WebMD Health Network includes: www.WebMD.com, the Company’s primary public portal for consumers and related mobile services; www.Medscape.com, the Company’s primary public portal for physicians and other healthcare professionals and related mobile services; and other sites through which the Company provides branded content. The Company’s services for consumers enable them to obtain information on health and wellness topics or on a particular disease or condition, to assess their personal health status, to use online trackers, tools and quizzes, to locate physicians, to receive periodic e-mailed newsletters and alerts on topics of individual interest, and to participate in online communities with peers and experts. The Company’s services for physicians and healthcare professionals make it easier for them to access clinical reference sources, stay abreast of the latest clinical information, learn about new treatment options, earn continuing medical education (“CME”) credit and communicate with peers. The Company does not charge any usage, membership or download fees for access to its public portals or mobile platforms. The Company generates revenue from its public portals and mobile platforms primarily through the sale of various types of advertising and sponsorship programs to its clients, which include: pharmaceutical, biotechnology and medical device companies; hospitals, clinics and other healthcare services companies; health insurance providers; consumer products companies whose products or services relate to health, wellness, diet, fitness, lifestyle, safety and illness prevention; and various other businesses, organizations and governmental entities. Advertisers and sponsors use the Company’s services to reach, educate and inform target audiences of consumers, physicians and other healthcare professionals. The Company also generates revenue from advertising sold in WebMD Magazine, a consumer magazine distributed to physician office waiting rooms. In addition, the Company generates revenue from the sale of certain information products. The Company’s private portals are a cloud-based population health management platform, hosted by the Company and provided to private and governmental employers and health plans for use by their employees and plan participants. The Company markets these private portals and related services under the WebMD Health Services brand. The WebMD Health Services platform enables employers and health plans to provide their employees and plan participants with access to personalized health and benefit information and decision-support tools that help them to make more informed benefit, treatment and provider decisions and motivate them to make healthier lifestyle choices. The Company also provides telephonic, online and onsite health coaching and targeted condition management programs for use by its private portals clients’ employees and plan participants to help them achieve their wellness goals. The Company generates revenue from subscriptions to its WebMD Health Services platform by employers and health plans, either directly or through its distributors. WebMD offers its health coaching services and its condition management programs on a per-participant basis.
Interim Financial Statements	'
	Interim Financial Statements
	The unaudited consolidated financial statements of the Company have been prepared by management and reflect all adjustments (consisting of only normal recurring adjustments) that, in the opinion of management, are necessary for a fair presentation of the interim periods presented. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the operating results to be expected for any subsequent period or for the entire year ending December 31, 2014. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted under the Securities and Exchange Commission’s rules and regulations.
	The unaudited consolidated financial statements and notes included herein should be read in conjunction with the Company’s audited consolidated financial statements and notes for the year ended December 31, 2013, which are included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission.
Seasonality	'
	Seasonality
	The timing of the Company’s revenue is affected by seasonal factors. The Company’s public portal advertising and sponsorship revenue is seasonal, primarily due to the annual spending patterns of the advertising and sponsorship clients of the Company’s public portals. This portion of the Company’s revenue is usually the lowest in the first quarter of each calendar year, and generally increases during each consecutive quarter throughout the year. The timing of revenue in relation to the Company’s expenses, many of which do not vary directly with revenue, has an impact on cost of operations, sales and marketing, and general and administrative expenses as a percentage of revenue in each calendar quarter.
Accounting Estimates	'
	Accounting Estimates
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the Consolidated Financial Statements and accompanying notes. The Company bases its estimates on historical experience, current business factors, and various other assumptions that the Company believes are necessary to consider to form a basis for making judgments about the carrying values of assets and liabilities, the recorded amounts of revenue and expenses, and the disclosure of contingent assets and liabilities. The Company is subject to uncertainties such as the impact of future events, economic and political factors, and changes in the Company’s business environment; therefore, actual results could differ from these estimates. Accordingly, the accounting estimates used in the preparation of the Company’s financial statements will change as new events occur, as more experience is acquired, as additional information is obtained and as the Company’s operating environment changes. Changes in estimates are made when circumstances warrant. Such changes in estimates and refinements in estimation methodologies are reflected in reported results of operations; if material, the effects of changes in estimates are disclosed in the notes to the Consolidated Financial Statements. Significant estimates and assumptions by management affect the allowance for doubtful accounts, the carrying value of long-lived assets (including goodwill and intangible assets), the amortization period of long-lived assets (excluding goodwill and indefinite-lived intangible assets), the carrying value, capitalization and amortization of software and Website development costs, the carrying value of investments, the provision for income taxes and related deferred tax accounts, certain accrued liabilities, revenue recognition, contingencies, litigation and related legal accruals and the value attributed to employee stock options and other stock-based awards.
Presentation of Segment Information	'
	Presentation of Segment Information
	The Company generates its revenue through its public and private portals. Discrete financial information related to a measure of profit or loss for these two revenue streams is not available as they leverage many common expenses, and the Company does not separately allocate these common expenses in assessing the performance of its business. Accordingly, the Company views its business as one reportable operating segment.
	The following table presents the revenues recognized related to the Company’s public portals and private portals during the three and six months ended June 30, 2014 and 2013:
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Public portal advertising and sponsorship	$	116,212	$	105,783	$	225,415	$	199,221
	Private portal services		24,188		19,534		48,817		38,858
		$	140,400	$	125,317	$	274,232	$	238,079
Loss Contingencies	'
	Loss Contingencies
	The Company accounts for loss contingencies in accordance with Financial Accounting Standards Board (“FASB”) ASC No. 450, “Contingencies.” Under ASC No. 450, accruals for loss contingencies are recorded when both (i) the information available indicates that it is probable that a liability has been incurred and (ii) the amount of the loss can be reasonably estimated. The Company records adjustments to these accruals to reflect the status of negotiations, settlements, advice of counsel and other information and events related to an individual matter.
Net Income Per Common Share	'
	Net Income Per Common Share
	Basic income per common share has been computed using the weighted-average number of shares of Common Stock outstanding during the periods presented. Diluted income per common share has been computed using the weighted-average number of shares of Common Stock outstanding during the periods, increased to give effect to potentially dilutive securities and assumes that any dilutive convertible notes were converted, only in the periods in which such effect is dilutive (shares in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Numerator:
	Net income — Basic	$	9,716	$	2,611	$	15,982	$	1,073
	Interest expense on 1.50% Notes, net of tax		864		—		1,728		—
	Net income — Diluted	$	10,580	$	2,611	$	17,710	$	1,073
	Denominator:
	Weighted-average shares — Basic		37,819		49,315		38,543		49,161
	Stock options and restricted stock		2,301		1,610		2,443		1,014
	1.50% Notes		5,681		—		5,681		—
	Adjusted weighted-average shares after assumed		45,801		50,925		46,667		50,175
	conversions — Diluted
	Net income per common share:
	Basic	$	0.26	$	0.05	$	0.41	$	0.02
	Diluted	$	0.23	$	0.05	$	0.38	$	0.02
	The Company has excluded certain of its convertible notes, as well as certain outstanding stock options and restricted stock, from the calculation of diluted income per common share during the periods in which such securities were anti-dilutive. The following table presents the total weighted average number of potentially dilutive common shares that were excluded from the computation of diluted income per common share during the periods presented (shares in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Options and restricted stock		2,688		5,768		2,584		9,091
	2.50% Notes		6,191		6,129		6,191		6,129
	2.25% Notes		3,503		5,500		3,503		5,500
			12,382		17,397		12,278		20,720
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	In April 2014, the FASB issued Accounting Standards Update (“ASU”) No. 2014-08, Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the criteria for determining which disposals can be presented as discontinued operations and modifies the related disclosure requirements. Under the new guidance, a discontinued operation is defined as a disposal of a component or group of components that represents a strategic shift that has, or will have, a major effect on an entity’s operations and financial results. The revised guidance is effective for the Company beginning in the quarter ending March 31, 2015; early adoption is permitted. The Company has not yet determined the impact the revised guidance will have on its consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), to achieve a consistent application of revenue recognition within the U.S., resulting in a single revenue model to be applied by reporting companies under U.S. generally accepted accounting principles. Under the new model, recognition of revenue occurs when a customer obtains control of promised goods or services in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In addition, the new standard requires that reporting companies disclose the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The new standard is effective for the Company beginning in the quarter ending March 31, 2017; early adoption is prohibited. The new standard is required to be applied retrospectively to each prior reporting period presented or retrospectively with the cumulative effect of initially applying it recognized at the date of initial application. The Company has not yet determined the impact of the new standard on its consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period, which requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. The new standard is effective for the Company beginning in the quarter ending March 31, 2016; early adoption is permitted. The Company has not yet determined the impact the revised guidance will have on its consolidated financial statements.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Revenues Relating to Public and Private Portals	'
	The following table presents the revenues recognized related to the Company’s public portals and private portals during the three and six months ended June 30, 2014 and 2013:
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Public portal advertising and sponsorship	$	116,212	$	105,783	$	225,415	$	199,221
	Private portal services		24,188		19,534		48,817		38,858
		$	140,400	$	125,317	$	274,232	$	238,079
Schedule of Net Income Per Common Shares	'
	Diluted income per common share has been computed using the weighted-average number of shares of Common Stock outstanding during the periods, increased to give effect to potentially dilutive securities and assumes that any dilutive convertible notes were converted, only in the periods in which such effect is dilutive (shares in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Numerator:
	Net income — Basic	$	9,716	$	2,611	$	15,982	$	1,073
	Interest expense on 1.50% Notes, net of tax		864		—		1,728		—
	Net income — Diluted	$	10,580	$	2,611	$	17,710	$	1,073
	Denominator:
	Weighted-average shares — Basic		37,819		49,315		38,543		49,161
	Stock options and restricted stock		2,301		1,610		2,443		1,014
	1.50% Notes		5,681		—		5,681		—
	Adjusted weighted-average shares after assumed		45,801		50,925		46,667		50,175
	conversions — Diluted
	Net income per common share:
	Basic	$	0.26	$	0.05	$	0.41	$	0.02
	Diluted	$	0.23	$	0.05	$	0.38	$	0.02
Weighted Average Number of Potentially Dilutive Common Shares Excluded from Computation of Diluted Income Per Common Share	'
	The following table presents the total weighted average number of potentially dilutive common shares that were excluded from the computation of diluted income per common share during the periods presented (shares in thousands):
		Three Months Ended				Six Months Ended
		June 30,				June 30,
		2014		2013		2014		2013
	Options and restricted stock		2,688		5,768		2,584		9,091
	2.50% Notes		6,191		6,129		6,191		6,129
	2.25% Notes		3,503		5,500		3,503		5,500
			12,382		17,397		12,278		20,720

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value Disclosures [Abstract]	'
Carrying Value and Estimated Fair Value of Company's Convertible Notes that are Carried at Historical Cost	'
	The following table presents the carrying value and estimated fair value (based on Level 1 market price data) of the Company’s convertible notes that were carried at historical cost as of June 30, 2014 and December 31, 2013:
		June 30, 2014				December 31, 2013
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
	2.25% Notes	$	252,232	$	260,276	$	252,232	$	252,863
	2.50% Notes		400,000		421,000		400,000		394,400
	1.50% Notes		300,000		335,223		300,000		294,852

Intangible_Assets_Tables

Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]	'
Schedule of Finite and Indefinite Lived Intangible Assets	'
	Intangible assets consist of the following:
			June 30, 2014									December 31, 2013
			Gross		Accumulated			Net		Weighted		Gross		Accumulated			Net		Weighted
			Carrying		Amortization					Average		Carrying		Amortization					Average
			Amount							Remaining		Amount							Remaining
										Useful Life(a)									Useful Life(a)
	Content		$	15,954	$	(15,954	)	$	—		—	$	15,954	$	(15,954	)	$	—		—
	Customer relationships			34,057		(26,081	)		7,976		4		34,057		(25,035	)		9,022		4.5
	Technology and patents			14,700		(14,700	)		—		—		14,700		(14,700	)		—		—
	Trade names-definite lives			2,530		(2,271	)		259		1.5		2,530		(2,182	)		348		2
	Trade names-indefinite lives			4,464		—			4,464		n/a		4,464		—			4,464		n/a
	Total		$	71,705	$	(59,006	)	$	12,699			$	71,705	$	(57,871	)	$	13,834
	(a)	The calculation of the weighted average remaining useful life is based on the net book value and the remaining amortization period of each respective intangible asset.
Amortization Expense for Intangible Assets	'
	Aggregate amortization expense for intangible assets is estimated to be:
	Year Ending December 31:
	2014 (July 1st to December 31st)		$	1,136
	2015		$	2,261
	2016		$	2,059
	2017		$	1,513
	2018		$	1,266

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Schedule of Share-Based Compensation, Stock Options, Activity	'
	The following table summarizes stock option activity for the Plans:
			Shares			Weighted		Weighted		Aggregate
						Average Exercise		Average		Intrinsic Value(a)
						Price Per Share		Remaining
								Contractual
								Life (In Years)
	Outstanding at January 1, 2014			11,429,279		$	29.12
	Granted			483,000			42.22
	Exercised			(1,759,129	)		26.13
	Cancelled			(657,051	)		31.72
	Outstanding at June 30, 2014			9,496,099		$	30.16		7	$	174,212
	Vested and exercisable at the end of the period			4,398,734		$	29.86		5.1	$	82,843
	(a)	The aggregate intrinsic value is based on the market price of the Company’s Common Stock on June 30, 2014, which was $48.30, less the applicable exercise price of the underlying option. This aggregate intrinsic value represents the amount that would have been realized if all the option holders had exercised their options on June 30, 2014.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	'
	The risk-free rate is based on the U.S. Treasury yield curve for periods equal to the expected term of the options on the grant date.
			Six Months Ended
			June 30,
			2014			2013
	Expected dividend yield			0.00%			0.00%
	Expected volatility			0.48-0.49			0.43-0.46
	Risk-free interest rate			1.28%-1.72%			0.55%-1.23%
	Expected term (years)			4.3-5.0			4.5-5.1
	Weighted-average fair value of options granted during the period		$	17.82		$	8.61
Schedule of Share-based Compensation, Restricted Stock Awards, Activity	'
	The following table summarizes the activity of the Company’s Restricted Stock:
			Shares			Weighted
						Average Grant
						Date Fair Value
	Balance at January 1, 2014			1,184,961		$	33.07
	Granted			89,500			44.41
	Vested			(226,828	)		33.44
	Forfeited			(96,625	)		29.7
	Balance at June 30, 2014			951,008		$	34.39
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	'
	The following table summarizes the components and classification of stock-based compensation expense:
			Three Months Ended					Six Months Ended
			June 30,					June 30,
			2014			2013		2014		2013
	Stock options		$	4,953		$	7,247	$	10,419	$	13,861
	Restricted stock			2,603			3,883		5,750		7,112
	Other			77			94		154		188
	Total stock-based compensation expense		$	7,633		$	11,224	$	16,323	$	21,161
	Included in:
	Cost of operations		$	1,429		$	1,471	$	2,893	$	3,341
	Sales and marketing			1,694			1,997		3,799		4,520
	General and administrative			4,510			7,756		9,631		13,300
	Total stock-based compensation expense		$	7,633		$	11,224	$	16,323	$	21,161

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
	Segment
Summary Of Significant Accounting Policies [Line Items]	'
Entity Incorporation, date of incorporation	3-May-05
Number of reportable operating segment	1
Minimum [Member]	'
Summary Of Significant Accounting Policies [Line Items]	'
Percentage of ownership before sale of stock transaction	80.00%

Summary_of_Significant_Account4

Summary of Significant Accounting Policies - Summary of Revenues Relating to Public and Private Portals (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Summary of revenues relating to public and private portal	'	'	'	'
Revenues	$140,400	$125,317	$274,232	$238,079
Public Portal Advertising and Sponsorship [Member]	'	'	'	'
Summary of revenues relating to public and private portal	'	'	'	'
Revenues	116,212	105,783	225,415	199,221
Private Portal Services [Member]	'	'	'	'
Summary of revenues relating to public and private portal	'	'	'	'
Revenues	$24,188	$19,534	$48,817	$38,858

Summary_of_Significant_Account5

Summary of Significant Accounting Policies - Schedule of Net Income Per Common Shares (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:	'	'	'	'
Net income - Basic	$9,716	$2,611	$15,982	$1,073
Interest expense on 1.50% Notes, net of tax	864	'	1,728	'
Net income - Diluted	$10,580	$2,611	$17,710	$1,073
Denominator:	'	'	'	'
Weighted-average shares - Basic	37,819	49,315	38,543	49,161
Stock options and restricted stock	2,301	1,610	2,443	1,014
1.50% Notes	5,681	'	5,681	'
Adjusted weighted-average shares after assumed conversions - Diluted	45,801	50,925	46,667	50,175
Net income per common share:	'	'	'	'
Basic	$0.26	$0.05	$0.41	$0.02
Diluted	$0.23	$0.05	$0.38	$0.02

Summary_of_Significant_Account6

Summary of Significant Accounting Policies - Schedule of Net Income Per Common Shares (Parenthetical) (Detail)	Jun. 30, 2014
Accounting Policies [Abstract]	'
Interest on notes	1.50%

Summary_of_Significant_Account7

Summary of Significant Accounting Policies - Weighted Average Number of Potentially Dilutive Common Shares Excluded from Computation of Diluted Income Per Common Share (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Weighted average number of potentially dilutive common shares that were excluded from the computation of diluted income per common share	12,382	17,397	12,278	20,720
Options and Restricted Stock [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Weighted average number of potentially dilutive common shares that were excluded from the computation of diluted income per common share	2,688	5,768	2,584	9,091
2.50% Convertible Notes Due 2018 [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Weighted average number of potentially dilutive common shares that were excluded from the computation of diluted income per common share	6,191	6,129	6,191	6,129
2.25% Convertible Notes Due 2016 [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Weighted average number of potentially dilutive common shares that were excluded from the computation of diluted income per common share	3,503	5,500	3,503	5,500

Convertible_Notes_Additional_I

Convertible Notes - Additional Information (Detail) (USD $)

6 Months Ended

0 Months Ended

3 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

6 Months Ended

0 Months Ended

In Thousands, except Share data, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2013

Mar. 14, 2011

Jun. 30, 2014

Dec. 31, 2013

Sep. 30, 2013

Mar. 14, 2011

Sep. 11, 2013

Apr. 04, 2012

Sep. 11, 2013

Apr. 04, 2012

Jan. 11, 2011

Jun. 30, 2014

Dec. 31, 2013

Jan. 11, 2011

Apr. 04, 2012

Jun. 30, 2014

Apr. 04, 2012

Nov. 26, 2013

Jun. 30, 2014

Jun. 30, 2014

Dec. 31, 2013

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.25% Convertible Notes Due 2016 [Member]

2.50% Convertible Notes Due 2018 [Member]

2.50% Convertible Notes Due 2018 [Member]

2.50% Convertible Notes Due 2018 [Member]

2.50% Convertible Notes Due 2018 [Member]

2.50% Convertible Notes Due 2018 [Member]

2.50% Convertible Notes Due 2018 [Member]

2.50% Convertible Notes Due 2018 [Member]

1.50% Senior Convertible Note [Member]

1.50% Senior Convertible Note [Member]

1.50% Convertible Notes Due 2020 [Member]

1.50% Convertible Notes Due 2020 [Member]

Before Equitable Adjustment [Member]

After Equitable Adjustment [Member]

After Equitable Adjustment [Member]

After Equitable Adjustment [Member]

After Equitable Adjustment [Member]

Before Equitable Adjustment [Member]

After Equitable Adjustment [Member]

After Equitable Adjustment [Member]

After Equitable Adjustment [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible notes due

'

'

$400,000

'

'

'

'

'

'

'

'

$400,000

'

'

'

'

'

'

$300,000

'

'

'

Interest on convertible notes

1.50%

'

2.25%

'

'

'

'

'

'

'

'

2.50%

'

'

'

'

'

'

1.50%

'

'

'

Debt Instrument, Maturity Date

'

'

31-Mar-16

'

'

'

'

'

'

'

'

31-Jan-18

'

'

'

'

'

'

1-Dec-20

'

'

'

Proceed From sale of Notes

'

'

387,400

'

'

'

'

'

'

'

'

387,345

'

'

'

'

'

'

291,823

'

'

'

Cash paid to repurchase Common Stock

102,353

1,281

50,000

'

'

'

'

'

'

'

'

100,000

'

'

'

'

'

'

'

'

'

'

Common stock repurchased, shares

'

'

868,507

'

'

'

'

'

'

'

'

1,920,490

'

'

'

'

'

'

'

'

'

'

Common stock repurchased, price per share

'

'

$57.57

'

'

'

'

'

'

'

'

$52.07

'

'

'

'

'

'

'

'

'

'

Conversion price per share of common stock

'

'

'

'

'

'

$73.69

'

'

$72

$72.73

'

'

'

$66.13

'

$64.61

$65.26

$52.81

'

'

'

Conversion rate of notes per thousand dollar of principal amount

'

'

'

'

'

'

13.5704

13.8884

13.7502

'

'

'

'

'

15.122

15.3223

15.4764

'

18.9362

'

'

'

Common Stock aggregate convertible

'

'

'

3,503,099

3,503,099

'

5,428,160

5,555,360

5,500,080

'

'

'

'

'

6,048,800

6,128,920

6,190,560

'

5,680,860

'

'

'

Percentage of principal amount equal to repurchase price

100.00%

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

Convertible notes repurchased

'

'

'

'

47,768

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repurchased amount in cash open market

'

'

'

'

48,604

101,750

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Pre-tax loss on repurchase of notes

'

'

'

'

1,575

3,296

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amount repurchases remaining

'

'

'

$252,232

$252,232

'

'

'

'

'

'

'

$400,000

$400,000

'

'

'

'

'

'

$300,000

$300,000

Minimum Percentage of consideration received or to be received by holders of Common Stock for repurchase option

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

90.00%

'

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Additional Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash and cash equivalents, Fair value	$781,311	$824,880
Private Equity Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Carrying Amount	$6,471	$6,471

Fair_Value_of_Financial_Instru3

Fair Value of Financial Instruments - Carrying Value and Estimated Fair Value of Company's Convertible Notes that are Carried at Historical Cost (Detail) (Level 1 [Member], USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
2.25% Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Notes, Carrying Amount	$252,232	$252,232
Notes, Fair Value	260,276	252,863
2.50% Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Notes, Carrying Amount	400,000	400,000
Notes, Fair Value	421,000	394,400
1.50% Senior Convertible Note [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Notes, Carrying Amount	300,000	300,000
Notes, Fair Value	$335,223	$294,852

Fair_Value_of_Financial_Instru4

Fair Value of Financial Instruments - Carrying Value and Estimated Fair Value of Company's Convertible Notes that are Carried at Historical Cost (Parenthetical) (Detail)	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Notes, Interest Rate	1.50%	'
Level 1 [Member] | 2.25% Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Notes, Interest Rate	2.25%	2.25%
Level 1 [Member] | 2.50% Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Notes, Interest Rate	2.50%	2.50%
Level 1 [Member] | 1.50% Senior Convertible Note [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Notes, Interest Rate	1.50%	1.50%

Stock_Repurchase_Program_Addit

Stock Repurchase Program - Additional Information (Detail) (USD $)

6 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

6 Months Ended

In Thousands, except Share data, unless otherwise specified

Jun. 30, 2014

Jun. 30, 2013

Apr. 30, 2014

Mar. 31, 2014

Feb. 28, 2014

Oct. 31, 2011

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Aug. 31, 2011

Jun. 30, 2013

2011 Program [Member]

2011 Program [Member]

2011 Program [Member]

2011 Program [Member]

2011 Program [Member]

2011 Program [Member]

2011 Program [Member]

2011 Program [Member]

2011 Program [Member]

2012 Program [Member]

Maximum [Member]

Equity, Class of Treasury Stock [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stock repurchase Common Stock value, authorized

'

'

'

'

'

'

'

'

'

'

$75,000

'

Stock repurchase program authorized additional amount

'

'

30,000

40,000

50,000

75,000

'

'

'

'

'

'

Common stock repurchased, shares

'

'

'

'

'

'

864,183

0

2,459,087

45,166

'

39,857

Cash paid to repurchase Common Stock

102,353

1,281

'

'

'

'

34,847

'

102,353

712

'

569

Stock repurchase program, remaining authorized repurchase amount

'

'

'

'

'

'

$37,511

'

$37,511

'

'

'

Intangible_Assets_Schedule_of_

Intangible Assets - Schedule of Finite and Indefinite Lived Intangible Assets (Detail) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]	'	'
Indefinite and finite lived intangible assets, Gross Carrying Amount	$71,705	$71,705
Intangible Assets, Accumulated Amortization	-59,006	-57,871
Indefinite and finite lived intangible assets, Net	12,699	13,834
Trade names-indefinite lives [Member]	'	'
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]	'	'
Indefinite-lived intangible assets, Gross Carrying Amount	4,464	4,464
Indefinite-lived intangible assets, Net	4,464	4,464
Content [Member]	'	'
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]	'	'
Finite lived intangible assets, Gross Carrying Amount	15,954	15,954
Intangible Assets, Accumulated Amortization	-15,954	-15,954
Customer relationships [Member]	'	'
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]	'	'
Finite lived intangible assets, Gross Carrying Amount	34,057	34,057
Intangible Assets, Accumulated Amortization	-26,081	-25,035
Finite lived intangible assets, Net	7,976	9,022
Intangible Assets, Weighted Average Remaining Useful Life	'4 years	'4 years 6 months
Technology and patents [Member]	'	'
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]	'	'
Finite lived intangible assets, Gross Carrying Amount	14,700	14,700
Intangible Assets, Accumulated Amortization	-14,700	-14,700
Trade names-definitive lives [Member]	'	'
Acquired Finite And Indefinite Lived Intangible Assets [Line Items]	'	'
Finite lived intangible assets, Gross Carrying Amount	2,530	2,530
Intangible Assets, Accumulated Amortization	-2,271	-2,182
Finite lived intangible assets, Net	$259	$348
Intangible Assets, Weighted Average Remaining Useful Life	'1 year 6 months	'2 years

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Finite Lived Intangible Assets Net [Abstract]	'	'	'	'
Amortization expense	$567	$568	$1,135	$1,135

Intangible_Assets_Amortization

Intangible Assets - Amortization Expense for Intangible Assets (Detail) (USD $)	Jun. 30, 2014
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'
2014 (July 1st to December 31st)	$1,136
2015	2,261
2016	2,059
2017	1,513
2018	$1,266

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	6 Months Ended		0 Months Ended		0 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 27, 2013	Aug. 14, 2013	Jun. 30, 2014	Oct. 25, 2012	Oct. 25, 2012
			New Hampshire Insurance Company [Member]	New Hampshire Insurance Company [Member]	Minimum [Member]	Maximum [Member]
					National Jewish Health [Member]	National Jewish Health [Member]
Contingencies And Commitments [Line Items]	'	'	'	'	'	'
Damages	'	'	'	'	$8,000	$10,000
Outstanding claims	'	1,965	1,965	'	'	'
Maximum amount of claims in dispute	4,900	'	'	'	'	'
Provision for claims in dispute	0	'	'	'	'	'
Broker seeking recovery paid stop loss carrier under stop loss policy	'	'	2,935	'	'	'
Recovery from outstanding	'	'	'	$1,965	'	'

StockBased_Compensation_Additi

Stock-Based Compensation - Additional information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Maximum number of shares of the Company's common stock	21,575,000	'	21,575,000	'
Common stock available for future grants	768,132	'	768,132	'
Proceeds from exercise of stock options	$12,665	$9,668	$30,147	$10,340
Employee withholding tax paid	5,013	1,571	10,339	1,745
Combined value of Stock option exercised and restricted stocks vested	19,512	5,954	45,495	8,675
Stock-based compensation expense	7,633	11,224	16,323	21,161
Unrecognized stock-based compensation expense related to unvested awards	60,200	'	60,200	'
Period for recognition of unrecognized Stock based compensation expense	'	'	'2 years 10 months 24 days	'
Percentage of tax benefit attributable to stock-based compensation	'	'	39.00%	39.00%
Director [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Stock-based compensation expense	77	94	154	188
Stock Options [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Vesting dates expiration from date of grant	'	'	'10 years	'
Stock-based compensation expense	4,953	7,247	10,419	13,861
Restricted Stock [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Stock-based compensation expense	$2,603	$3,883	$5,750	$7,112
Minimum [Member] | Stock Options [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Share based compensation arrangement by share based payment awards award vesting period	'	'	'2 Years	'
Minimum [Member] | Restricted Stock [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Share based compensation arrangement by share based payment awards award vesting period	'	'	'3 Years	'
Maximum [Member] | Stock Options [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Share based compensation arrangement by share based payment awards award vesting period	'	'	'5 Years	'
Maximum [Member] | Restricted Stock [Member]	'	'	'	'
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]	'	'	'	'
Share based compensation arrangement by share based payment awards award vesting period	'	'	'5 Years	'

StockBased_Compensation_Schedu

Stock-Based Compensation - Schedule of Share-Based Compensation, Stock Options, Activity (Detail) (USD $)	6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Shares Outstanding, Beginning Balance	11,429,279
Granted, Shares	483,000
Exercised, Shares	-1,759,129
Cancelled, Shares	-657,051
Shares Outstanding, Ending Balance	9,496,099
Vested and Exercisable, Shares	4,398,734
Weighted Average Exercise Price Per Share, Outstanding, at the beginning of the period	$29.12
Weighted Average Exercise Price Per Share, Granted	$42.22
Weighted Average Exercise Price Per Share, Exercised	$26.13
Weighted Average Exercise Price Per Share, Cancelled	$31.72
Weighted Average Exercise Price Per Share, Outstanding, at the end of the period	$30.16
Weighted Average Exercise Price per Share, Vested and exercisable at the end of the period	$29.86
Weighted Average Remaining Contractual Life (In Years), Outstanding	'7 years
Weighted Average Remaining Contractual Life (In Years), Vested and exercisable at the end of the period	'5 years 1 month 6 days
Aggregate Intrinsic Value, Outstanding	$174,212
Aggregate Intrinsic Value, Vested and Exercisable	$82,843

StockBased_Compensation_Schedu1

Stock-Based Compensation - Schedule of Share-Based Compensation, Stock Options, Activity (Parenthetical) (Detail) (USD $)	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Market price of Company's common stock	$48.30

StockBased_Compensation_Schedu2

Stock-Based Compensation - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Expected dividend yield	0.00%	0.00%
Expected volatility, Minimum	48.00%	43.00%
Expected volatility, Maximum	49.00%	46.00%
Risk-free interest rate, Minimum	1.28%	0.55%
Risk-free interest rate, Maximum	1.72%	1.23%
Weighted average fair value of options granted during the period	$17.82	$8.61
Minimum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Expected term (years)	'4 years 3 months 18 days	'4 years 6 months
Maximum [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Expected term (years)	'5 years	'5 years 1 month 6 days

StockBased_Compensation_Schedu3

Stock-Based Compensation - Schedule of Share-based Compensation, Restricted Stock Awards, Activity (Detail) (Restricted Stock [Member], USD $)	6 Months Ended
	Jun. 30, 2014
Restricted Stock [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Restricted Stock Awards, Shares, Balance at the beginning of the year	1,184,961
Restricted Stock Awards, Shares, Granted	89,500
Restricted Stock Awards, Shares, Vested	-226,828
Restricted Stock Awards, Shares, Forfeited	-96,625
Restricted Stock Awards, Shares, Balance at the end of the year	951,008
Weighted Average Grant Date Fair Value, Balance at the beginning of the year	$33.07
Weighted Average Grant Date Fair Value, Granted	$44.41
Weighted Average Grant Date Fair Value, Vested	$33.44
Weighted Average Grant Date Fair Value, Forfeited	$29.70
Weighted Average Grant Date Fair Value, Ending Balance	$34.39

StockBased_Compensation_Schedu4

Stock-Based Compensation - Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	$7,633	$11,224	$16,323	$21,161
Stock Options [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	4,953	7,247	10,419	13,861
Restricted Stock [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	2,603	3,883	5,750	7,112
Other [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	77	94	154	188
Cost of Operations [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	1,429	1,471	2,893	3,341
Sales and Marketing [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	1,694	1,997	3,799	4,520
General and Administrative [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	$4,510	$7,756	$9,631	$13,300

Subsequent_Event_Additional_In

Subsequent Event - Additional Information (Detail) (Subsequent Events [Member], USD $)	0 Months Ended
	Aug. 05, 2014	Aug. 05, 2014
Subsequent Events [Member]	'	'
Subsequent Event [Line Items]	'	'
Number of common stock authorized to repurchased	'	2,000,000
Common stock authorized to repurchase price per share	$48.50	'
Common stock repurchase program period from commencement date	'20 days	'