CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 37,187	$ 46,259	$ 21,847
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of business	0	(18,647)	0
Depreciation and amortization	19,559	17,275	17,646
Inventory step-up amortization	1,954	0	2,053
Long-lived asset impairment charge	0	1,354	0
Deferred income taxes	(1,172)	3,585	(1,477)
Stock-based compensation	4,359	2,827	2,787
Pension settlement charge	0	0	4,914
Income from equity method investment	(69)	0	0
Loss on disposition of property, plant and equipment	60	288	241
Accounts receivable	379	(2,749)	(7,189)
Inventories	500	479	4,539
Taxes receivable	1,169	276	(4,129)
Prepaid expenses and other assets	(3,355)	(1,337)	(2,318)
Accounts payable	3,505	(4,886)	1,167
Accrued payroll and other compensation	1,770	(3,416)	3,299
Benefit plan liabilities	487	(4,778)	(3,563)
Other, net	3,394	(420)	1,811
Net cash provided by operating activities	69,727	36,110	41,628
Cash flows from investing activities:
Business acquisitions, net of cash acquired	(152,242)	0	(79,407)
Capital expenditures	(25,466)	(20,645)	(13,971)
Proceeds from sale of business, net	0	28,550	0
Acquisition earn out payments	0	0	(111)
Net cash (used for) provided by investing activities	(177,708)	7,905	(93,489)
Cash flows from financing activities:
Proceeds from borrowings	116,600	0	60,000
Debt repayments	(10,328)	(20,571)	(20,646)
Common stock issued	1,194	1,521	2,457
Common stock repurchased	(1,091)	(8,701)	(748)
Excess tax benefit on stock awards	0	1,044	1,486
Net cash provided by (used for) financing activities	106,375	(26,707)	42,549
Effect of exchange rate changes on cash	(2,369)	(3,450)	(4,044)
(Decrease) Increase in cash and cash equivalents	(3,975)	13,858	(13,356)
Cash and cash equivalents at beginning of period	75,909	62,051	75,407
Cash and cash equivalents at end of period	71,934	75,909	62,051
Cash paid during the year for:
Interest	787	632	875
Income taxes, net	$ 15,739	$ 20,180	$ 14,679