Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Income Statement [Abstract]
Revenues	$ 1,023,961	$ 869,791
Cost of revenues	726,863	623,933
Marketing	129,175	129,928
Technology and development	91,975	82,801
General and administrative	44,126	35,064
Operating income (loss)	31,822	(1,935)
Other income (expense):
Interest expense	(6,740)	(4,974)
Interest and other income (expense)	977	(116)
Loss on extinguishment of debt	(25,129)	0
Income (loss) before income taxes	930	(7,025)
Benefit for income taxes	(1,759)	(2,441)
Net income (loss)	$ 2,689	$ (4,584)
Earnings (loss) per share:
Basic (in dollars per share)	$ 0.05	$ (0.08)
Diluted (in dollars per share)	$ 0.05	$ (0.08)
Weighted average common shares outstanding:
Basic (in shares)	55,972	55,456
Diluted (in shares)	60,146	55,456