CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,933	$ 11,220
Loss from discontinued operations, net of taxes	334	183
Net income from continuing operations	6,267	11,403
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,464	17,551
Amortization	8,437	4,967
Amortization of debt issuance costs	364	322
Net legal settlements and related expenses	(11)	0
Payments for legal settlements and related expenses	(110)	0
Deferred income taxes	(601)	908
Restructuring costs	4,146	0
Payments for restructuring costs	(3,583)	(1,659)
Asset impairments	150	0
Equity-based compensation	6,065	4,884
Excess tax benefits from share-based payment arrangements	(92)	(395)
Provision for doubtful accounts	447	362
Acquisition-related costs	3,600	3,691
Cash paid for acquisition-related costs	(3,067)	(3,779)
Changes in working capital, net of business acquisitions	(10,218)	812
Net cash provided by operating activities from continuing operations	29,258	39,067
Net cash used in operating activities from discontinued operations	(391)	(165)
Net cash provided by operating activities	28,867	38,902
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(19,782)	(15,520)
Business acquisitions, net of cash acquired	(16,284)	66
Other investing activities, net	(301)	2,052
Net cash used in investing activities from continuing operations	(36,367)	(13,402)
Net cash used in investing activities from discontinued operations	0	0
Net cash used in investing activities	(36,367)	(13,402)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments under borrowing arrangements	(55,291)	(83,447)
Proceeds from borrowing arrangements	61,500	62,000
Payment of earn-out liability	(1,841)	0
Excess tax benefits of share-based payment arrangements	92	395
Purchase and retirement of treasury stock, at cost	(15,293)	(18,988)
Exercise of stock options	0	963
Net cash used in financing activities from continuing operations	(10,833)	(39,077)
Net cash used in financing activities from discontinued operations	0	0
Net cash used in financing activities	(10,833)	(39,077)
Effect of exchange rate changes on cash and equivalents	(1,180)	548
NET DECREASE IN CASH AND EQUIVALENTS	(19,513)	(13,029)
CASH AND EQUIVALENTS, beginning of period	40,220	44,955
CASH AND EQUIVALENTS, end of period	$ 20,707	$ 31,926