CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 21,434	$ 4,831	$ 13,609
(Income) loss from discontinued operations, net of taxes	(4,546)	4,135	12,149
Income from continuing operations	16,888	8,966	25,758
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	30,831	25,980	22,159
Amortization	6,365	7,386	10,517
Amortization of debt issuance costs	926	917	614
Write-off of unamortized debt issuance costs	743	161
Net legal settlements and related expenses	399	659	297
Payments for legal settlements and related expenses	(246)	(417)	(132)
Deferred income taxes, net of effect of acquisitions	2,814	(3,448)	1,180
Restructuring costs	847	12,257	9,427
Payments for restructuring costs	(6,779)	(9,537)	(4,326)
Asset impairments	456	290	684
Equity-based compensation	6,757	8,597	10,495
Excess tax benefits from share-based payment arrangements			(1,716)
Unrealized gain on change in fair value of interest rate swaps		(1,228)	(3,366)
Provision for doubtful accounts	626	855	209
Changes in assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(8,937)	1,493	4,493
Other assets and liabilities	4,342	(5,752)	8,389
Accounts payable and accrued expenses	2,697	738	(8,555)
Net cash provided by operating activities from continuing operations	58,729	47,917	76,127
Net cash (used in) provided by operating activities from discontinued operations	(792)	17,901	13,275
Net cash provided by operating activities	57,937	65,818	89,402
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(30,100)	(32,868)	(26,856)
Other investing activities	(427)	10	101
Business disposition	1,902	51,281	1,000
Business acquisitions, net of cash acquired	(1,282)	(591)	(8,421)
Net cash (used in) provided by investing activities from continuing operations	(29,907)	17,832	(34,176)
Net cash used in investing activities from discontinued operations	(276)	(6,009)	(14,577)
Net cash (used in) provided by investing activities	(30,183)	11,823	(48,753)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments under borrowing arrangements	(70,793)	(200,586)	(201,657)
Proceeds from borrowing arrangements	85,971	158,756	186,019
Payment of debt issuance costs	(1,469)	(1,165)	(147)
Repayment of shareholder notes		1,904	93
Excess tax benefits from share-based payment arrangements			1,716
Purchase of treasury stock, at cost	(23,852)	(61,603)	(14,491)
Exercise of stock options	614		563
Net cash used in financing activities from continuing operations	(9,529)	(102,694)	(27,904)
Net cash used in financing activities from discontinued operations	(140)	(90)	(108)
Net cash used in financing activities	(9,669)	(102,784)	(28,012)
Effect of exchange rate changes on cash and equivalents	(1,153)	(1,158)	1,230
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS	16,932	(26,301)	13,867
CASH AND EQUIVALENTS, beginning of period	15,101	41,402	27,535
CASH AND EQUIVALENTS, end of period	$ 32,033	$ 15,101	$ 41,402