CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 9,272	$ 13,766
Loss from discontinued operations, net of taxes	453	283
Net income from continuing operations	9,725	14,049
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	26,350	26,248
Amortization	12,399	7,549
Amortization of debt issuance costs	546	491
Net legal settlements and related expenses	(21)	172
Payments for legal settlements and related expenses	(116)	(170)
Deferred income taxes	(1,598)	1,096
Restructuring costs	4,195	68
Payments for restructuring costs	(4,559)	(1,816)
Asset impairments	151	4,938
Equity-based compensation	9,821	7,544
Excess tax benefits from share-based payment arrangements	(215)	(448)
Provision for doubtful accounts	467	203
Acquisition/divestiture-related costs	6,021	5,838
Cash paid for acquisition/divestiture-related costs	(5,056)	(5,411)
Changes in working capital, net of business acquisitions	(16,556)	(6,460)
Net cash provided by operating activities from continuing operations	41,554	53,891
Net cash used in operating activities from discontinued operations	(508)	(259)
Net cash provided by operating activities	41,046	53,632
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(27,997)	(26,562)
Business acquisitions, net of cash acquired	(16,109)	(55,517)
Other investing activities, net	(301)	2,046
Net cash used in investing activities from continuing operations	(44,407)	(80,033)
Net cash used in investing activities from discontinued operations	0	0
Net cash used in investing activities	(44,407)	(80,033)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments under borrowing arrangements	(81,971)	(99,509)
Proceeds from borrowing arrangements	83,500	137,000
Payment of debt issuance costs	0	(1,060)
Payment of earn-out liability	(1,841)	0
Excess tax benefits of share-based payment arrangements	215	448
Purchase and retirement of treasury stock, at cost	(15,605)	(25,844)
Exercise of stock options	0	963
Net cash (used in) provided by financing activities from continuing operations	(15,702)	11,998
Net cash (used in) provided by financing activities from discontinued operations	0	0
Net cash (used in) provided by financing activities	(15,702)	11,998
Effect of exchange rate changes on cash and equivalents	(1,840)	(1,047)
NET DECREASE IN CASH AND EQUIVALENTS	(20,903)	(15,450)
CASH AND EQUIVALENTS, beginning of period	40,220	44,955
CASH AND EQUIVALENTS, end of period	$ 19,317	$ 29,505