CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 18,305	$ 20,347
Loss (income) from discontinued operations, net of taxes	334	(6,740)
Net income from continuing operations	18,639	13,607
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	24,207	23,172
Amortization	3,239	5,061
Amortization of debt issuance costs	443	702
Net legal settlements and related expenses	1,851	36
Payments for legal settlements and related expenses	(101)	(36)
Deferred income taxes	2,907	1,411
Restructuring costs	703	38
Payments for restructuring costs	(1,887)	(5,673)
Asset impairments	741	116
Equity-based compensation	6,113	5,209
Excess tax benefits from share-based payment arrangements	(267)
Provision for doubtful accounts	828	456
Changes in working capital	(14,412)	(4,528)
Net cash provided by operating activities from continuing operations	43,004	39,571
Net cash used in operating activities from discontinued operations	(668)	(591)
Net cash provided by operating activities	42,336	38,980
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(24,154)	(23,304)
Other investing activities	(1,479)	(1,222)
Business dispositions		1,903
Net cash used in investing activities from continuing operations	(25,633)	(22,623)
Net cash used in investing activities from discontinued operations	(60)
Net cash used in investing activities	(25,693)	(22,623)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments under borrowing arrangements	(53,011)	(50,067)
Proceeds from borrowing arrangements	55,529	68,971
Payments of debt issuance costs	(23)
Excess tax benefits of share-based payment arrangements	267
Purchase of treasury stock, at cost	(19,358)	(20,911)
Exercise of stock options	932
Net cash used in financing activities from continuing operations	(15,664)	(2,007)
Net cash used in financing activities from discontinued operations
Net cash used in financing activities	(15,664)	(2,007)
Effect of exchange rate changes on cash and equivalents	132	(437)
NET INCREASE IN CASH AND EQUIVALENTS	1,111	13,913
CASH AND EQUIVALENTS, beginning of period	32,033	15,101
CASH AND EQUIVALENTS, end of period	$ 33,144	$ 29,014