Consolidated Statements of Operations (unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Income Statement [Abstract]
Revenues	$ 76,938	$ 56,753	$ 150,276	$ 109,427
Cost of revenues (excludes depreciation and amortization)	4,807	4,684	9,992	9,629
Selling, general and administrative expenses:
Marketing	39,409	30,025	80,658	58,482
Personnel	11,306	9,800	23,219	19,839
Other general and administrative expenses	3,615	4,164	8,447	8,381
Total selling, general and administrative expenses (excludes depreciation and amortization)	54,330	43,989	112,324	86,702
Depreciation and amortization	2,050	2,341	4,100	4,402
Impairment of intangible assets	0	0	0	14,980
Income (loss) from operations	15,751	5,739	23,860	(6,286)
Other income (expense)
Interest income	47	24	68	45
Other income (expense)	(613)	306	(809)	917
Total other income (expense)	(566)	330	(741)	962
Income (loss) before taxes	15,185	6,069	23,119	(5,324)
Income tax expense (benefit)	7,897	2,293	11,686	(2,186)
Net income (loss)	7,288	3,776	11,433	(3,138)
Redeemable convertible preferred stock dividends declared	(2,936)	(2,936)	(5,872)	(5,872)
Deemed dividend resulting from modification of redeemable convertible preferred stock	(2,929)	0	(2,929)	0
Net income (loss) attributed to common stockholders	$ 1,423	$ 840	$ 2,632	$ (9,010)
Net income (loss) per common share
Basic	$ 0.20	$ 0.11	$ 0.37	$ (1.21)
Diluted	$ 0.19	$ 0.10	$ 0.30	$ (1.21)
Weighted average common shares
Basic	7,049,863	7,505,505	7,043,571	7,451,737
Diluted	38,620,694	37,391,530	37,959,369	7,451,737