Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Revenues	$ 1,573,129us-gaap_Revenues	$ 1,270,089us-gaap_Revenues
Cost of revenues	1,046,401us-gaap_CostOfRevenue	869,186us-gaap_CostOfRevenue
Marketing	194,677us-gaap_MarketingExpense	137,098us-gaap_MarketingExpense
Technology and development	143,106us-gaap_ResearchAndDevelopmentExpense	110,310us-gaap_ResearchAndDevelopmentExpense
General and administrative	91,489us-gaap_GeneralAndAdministrativeExpense	55,900us-gaap_GeneralAndAdministrativeExpense
Operating income	97,456us-gaap_OperatingIncomeLoss	97,595us-gaap_OperatingIncomeLoss
Other income (expense):
Interest expense	(26,737)us-gaap_InterestExpense	(10,052)us-gaap_InterestExpense
Interest and other income (expense)	(32,293)us-gaap_NonoperatingIncomeExpense	1,401us-gaap_NonoperatingIncomeExpense
Income before income taxes	38,426	88,944
Provision for income taxes	14,730us-gaap_IncomeTaxExpenseBenefit	35,829us-gaap_IncomeTaxExpenseBenefit
Net income	$ 23,696us-gaap_NetIncomeLoss	$ 53,115us-gaap_NetIncomeLoss
Earnings per share:
Basic (in dollars per share)	$ 0.39us-gaap_EarningsPerShareBasic	$ 0.89us-gaap_EarningsPerShareBasic
Diluted (in dollars per share)	$ 0.38us-gaap_EarningsPerShareDiluted	$ 0.86us-gaap_EarningsPerShareDiluted
Weighted-average common shares outstanding:
Basic (in shares)	60,518	59,817
Diluted (in shares)	61,973	61,548

The aggregate cost of goods produced and sold and services rendered during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 2

-Article 5