Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities
Net income	$ 3,996	$ 9,029
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,480	6,054
Stock compensation expense	1,635	1,348
Net loss (gain) on sale of assets	12	(189)
Exit activity (recoveries) costs, non-cash	(917)	910
Other, net	240	(220)
Changes in operating assets and liabilities, excluding the effects of acquisitions:
Accounts receivable	(4,462)	14,880
Inventories	2,338	117
Other current assets and other assets	410	(254)
Accounts payable	5,672	(5,101)
Accrued expenses and other non-current liabilities	(12,061)	(11,033)
Net cash provided by operating activities	2,343	15,541
Cash Flows from Investing Activities
Cash paid for acquisitions, net of cash acquired	(18,561)	(2,314)
Net proceeds from sale of property and equipment	9,233	57
Purchases of property, plant, and equipment	(1,453)	(1,501)
Other, net	0	1,118
Net cash used in investing activities	(10,781)	(2,640)
Cash Flows from Financing Activities
Payment of debt issuance costs	0	54
Purchase of treasury stock at market prices	(922)	(414)
Net proceeds from issuance of common stock	11	133
Net cash used in financing activities	(911)	(335)
Effect of exchange rate changes on cash	73	1,203
Net (decrease) increase in cash and cash equivalents	(9,276)	13,769
Cash and cash equivalents at beginning of year	170,177	68,858
Cash and cash equivalents at end of period	$ 160,901	$ 82,627