CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net revenues	$ 473,834	$ 441,753	$ 453,962
Operating expenses
Cost of revenues (exclusive of depreciation and amortization shown separately below)	195,822	178,699	178,917
Selling and marketing	134,018	122,034	118,386
General and administrative (exclusive of expenses shown separately below)	57,176	58,576	56,286
Research and development	11,521	14,136	11,307
Excise and sales tax expense	352	439
Depreciation	30,831	25,980	22,159
Amortization	6,365	7,386	10,517
Restructuring costs	847	12,257	9,427
Asset impairments	456	290	684
Net legal settlements and related expenses	399	659	297
Acquisition-related costs	91	316	612
Total operating expenses	437,878	420,772	408,592
Operating income	35,956	20,981	45,370
Other (expense) income
Interest expense	(9,954)	(10,785)	(11,308)
Unrealized gain on change in fair value of interest rate swaps		1,228	3,366
Interest income	46	157	419
Other, net	(574)	(1,075)	311
Total other expense	(10,482)	(10,475)	(7,212)
Income from continuing operations before income taxes	25,474	10,506	38,158
Income tax expense	8,586	1,540	12,400
Net income from continuing operations	16,888	8,966	25,758
Income (loss) from discontinued operations, net of taxes	4,546	(4,135)	(12,149)
Net income	$ 21,434	$ 4,831	$ 13,609
BASIC WEIGHTED-AVERAGE SHARES OUTSTANDING (in Shares)	49,619	58,009	58,823
Basic net income (loss) per share
Continuing operations (in Dollars per share)	$ 0.34	$ 0.15	$ 0.44
Discontinued operations (in Dollars per share)	$ 0.09	$ (0.07)	$ (0.21)
Net income per share (in Dollars per share)	$ 0.43	$ 0.08	$ 0.23
DILUTED WEIGHTED-AVERAGE SHARES OUTSTANDING (in Shares)	49,971	58,355	59,310
Diluted net income (loss) per share
Continuing operations (in Dollars per share)	$ 0.34	$ 0.15	$ 0.43
Discontinued operations (in Dollars per share)	$ 0.09	$ (0.07)	$ (0.20)
Net income per share (in Dollars per share)	$ 0.43	$ 0.08	$ 0.23