CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 11,220	$ 15,053
Loss from discontinued operations, net of taxes	183	236
Net income from continuing operations	11,403	15,289
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,551	16,570
Amortization	4,967	854
Amortization of debt issuance costs	322	296
Net legal settlements and related expenses	0	313
Payments for legal settlements and related expenses	0	(91)
Deferred income taxes	908	1,741
Restructuring costs	0	201
Payments for restructuring costs	(1,659)	(922)
Asset impairments	0	198
Equity-based compensation	4,884	3,636
Excess tax benefits from share-based payment arrangements	(395)	(358)
Provision for doubtful accounts	362	360
Acquisition-related costs	3,691	0
Cash paid for acquisition-related costs	(3,779)	0
Changes in working capital	812	(8,189)
Net cash provided by operating activities from continuing operations	39,067	29,898
Net cash used in operating activities from discontinued operations	(165)	(257)
Net cash provided by operating activities	38,902	29,641
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(15,520)	(17,307)
Business acquisitions, net of cash acquired	66	0
Other investing activities, net	2,052	(625)
Net cash used in investing activities from continuing operations	(13,402)	(17,932)
Net cash used in investing activities from discontinued operations	0	0
Net cash used in investing activities	(13,402)	(17,932)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments under borrowing arrangements	(83,447)	(31,164)
Proceeds from borrowing arrangements	62,000	26,000
Excess tax benefits of share-based payment arrangements	395	358
Purchase and retirement of treasury stock, at cost	(18,988)	(1,758)
Exercise of stock options	963	0
Net cash used in financing activities from continuing operations	(39,077)	(6,564)
Net cash used in financing activities from discontinued operations	0	0
Net cash used in financing activities	(39,077)	(6,564)
Effect of exchange rate changes on cash and equivalents	548	(830)
NET (DECREASE) INCREASE IN CASH AND EQUIVALENTS	(13,029)	4,315
CASH AND EQUIVALENTS, beginning of period	44,955	20,976
CASH AND EQUIVALENTS, end of period	$ 31,926	$ 25,291