Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Statement [Abstract]
Revenues	$ 869,791	$ 718,553
Cost of revenues:
Subscription	564,015	376,992
Fulfillment expenses	59,918	61,159
Total cost of revenues	623,933	438,151
Gross profit	245,858	280,402
Operating expenses:
Marketing	135,900	104,259
Technology and development	82,801	50,905
General and administrative	29,092	22,998
Total operating expenses	247,793	178,162
Operating income (loss)	(1,935)	102,240
Other income (expense):
Interest expense	(4,974)	(4,865)
Interest and other income (expense)	(116)	865
Income (loss) before income taxes	(7,025)	98,240
Provision (benefit) for income taxes	(2,441)	38,007
Net income (loss)	$ (4,584)	$ 60,233
Net income (loss) per share:
Basic	$ (0.08)	$ 1.14
Diluted	$ (0.08)	$ 1.11
Weighted average common shares outstanding:
Basic	55,456	52,759
Diluted	55,456	54,246