Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ (6,434)	$ 3,366
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss on investment in Venezuela	0	1,177
Depreciation and amortization	10,069	5,690
Amortization of deferred loan costs	113	56
Provision for doubtful accounts	757	529
Foreign currency loss	38	374
Deferred income taxes	390	1,741
(Gain) loss on asset disposal	(105)	473
Non-cash compensation cost	2,089	1,286
Other, net	(155)	0
(Increase) decrease, net of the effect of acquisitions:
Receivables	8,138	(3,507)
Inventory	929	(1,630)
Prepaid expenses and other current assets	1,508	(456)
Increase (decrease), net of the effect of acquisitions:
Accounts payable	3,550	5,543
Other accrued liabilities	5,321	4,097
Income taxes	(4,709)	(8,834)
Net cash provided by operating activities	21,499	9,905
Cash flows from investing activities:
Capital expenditures	(11,580)	(7,648)
Business acquisitions, net of cash acquired	(33,077)	0
Proceeds from sale of assets	1,232	52
Decrease in other assets, net	92	98
Change related to Venezuelan operations	0	(617)
Net cash used in investing activities	(43,333)	(8,115)
Cash flows from financing activities:
Net borrowings under revolving credit agreement	64,950	10,670
Purchase of treasury stock	(1,720)	(21,138)
Debt issuance costs	(380)	0
Corporate tax effect from share-based payment arrangements	107	589
Issuance of common stock from share-based payment arrangements	1,001	1,047
Payments related to withholding tax for share-based payment arrangements	0	(15)
Net cash provided by (used in) financing activities	63,958	(8,847)
Effect of exchange rate changes on cash	1,360	(1,925)
Net increase (decrease) in cash and cash equivalents	43,484	(8,982)
Cash and cash equivalents at beginning of period	44,825	44,426
Cash and cash equivalents at end of period	$ 88,309	$ 35,444