CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 27,590	$ 21,434	$ 4,831
Loss (income) from discontinued operations, net of taxes	465	(4,546)	4,135
Income from continuing operations	28,055	16,888	8,966
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	32,482	30,831	25,980
Amortization	3,981	6,365	7,386
Amortization of debt issuance costs	592	926	917
Write-off of unamortized debt issuance costs		743	161
Net legal settlements and related expenses	2,034	399	659
Payments for legal settlements and related expenses	(1,512)	(246)	(417)
Deferred income taxes	(4,322)	2,814	(3,448)
Restructuring costs	612	847	12,257
Payments for restructuring costs	(3,213)	(6,779)	(9,537)
Asset impairments	879	456	290
Equity-based compensation	8,074	6,757	8,597
Excess tax benefits from share-based payment arrangements	(367)
Unrealized gain on change in fair value of interest rate swaps			(1,228)
Provision for doubtful accounts	1,089	626	855
Changes in assets and liabilities:
Accounts receivable, net	(3,581)	(8,937)	1,493
Other assets and liabilities	(3,415)	4,342	(5,752)
Accounts payable and accrued expenses	9,133	2,697	738
Net cash provided by operating activities from continuing operations	70,521	58,729	47,917
Net cash (used in) provided by operating activities from discontinued operations	(672)	(792)	17,901
Net cash provided by operating activities	69,849	57,937	65,818
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(32,338)	(30,100)	(32,868)
Other investing activities	(1,273)	(1,709)	(581)
Business dispositions		1,902	51,281
Net cash (used in) provided by investing activities from continuing operations	(33,611)	(29,907)	17,832
Net cash used in investing activities from discontinued operations	(60)	(276)	(6,009)
Net cash used in investing activities	(33,671)	(30,183)	11,823
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments under borrowing arrangements	(94,655)	(70,793)	(200,586)
Proceeds from borrowing arrangements	75,929	85,971	158,756
Payments of debt issuance costs	(23)	(1,469)	(1,165)
Repayment of shareholder notes			1,904
Excess tax benefits from share-based payment arrangements	367
Purchase of treasury stock, at cost	(29,915)	(23,852)	(61,603)
Exercise of stock options	932	614
Net cash used in financing activities from continuing operations	(47,365)	(9,529)	(102,694)
Net cash used in financing activities from discontinued operations		(140)	(90)
Net cash used in financing activities	(47,365)	(9,669)	(102,784)
Effect of exchange rate changes on cash and equivalents	130	(1,153)	(1,158)
NET (DECREASE) INCREASE IN CASH AND EQUIVALENTS	(11,057)	16,932	(26,301)
CASH AND EQUIVALENTS, beginning of period	32,033	15,101	41,402
CASH AND EQUIVALENTS, end of period	$ 20,976	$ 32,033	$ 15,101