Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net loss	$ (9,508)	$ (6,434)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	12,961	10,069
Amortization of deferred loan costs	157	113
Provision for doubtful accounts	1,774	757
Foreign currency loss	334	38
Deferred income taxes	(4,835)	390
Gain on revaluation of contingent consideration	(1,174)	0
Gain on asset disposal	(976)	(105)
Non-cash compensation cost	1,747	2,089
Other, net	(497)	(155)
(Increase) decrease, net of the effect of acquisitions:
Receivables	(6,919)	8,138
Inventory	(795)	929
Prepaid expenses and other current assets	1,746	1,508
Increase (decrease), net of the effect of acquisitions:
Accounts payable	(7,210)	3,550
Other accrued liabilities	12,681	5,321
Income taxes	(2,036)	(4,709)
Net cash (used in) provided by operating activities	(2,550)	21,499
Cash flows from investing activities:
Capital expenditures	(10,718)	(11,580)
Business acquisitions, net of cash acquired	0	(33,077)
Proceeds from sale of assets	533	1,232
Other	(570)	92
Net cash used in investing activities	(10,755)	(43,333)
Cash flows from financing activities:
Net debt borrowings (payments)	(5,100)	69,950
Payments under term loan	(5,000)	(5,000)
Purchase of treasury stock	0	(1,720)
Debt issuance costs	(10)	(380)
Corporate tax effect from share-based payment arrangements	0	107
Issuance of common stock from share-based payment arrangements	449	1,001
Payments related to withholding tax for share-based payment arrangements	(249)	0
Net cash (used in) provided by financing activities	(9,910)	63,958
Effect of exchange rate changes on cash	739	1,360
Net (decrease) increase in cash and cash equivalents	(22,476)	43,484
Cash and cash equivalents at beginning of period	46,216	44,825
Cash and cash equivalents at end of period	$ 23,740	$ 88,309