Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net earnings	$ 40,048	$ 44,063
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	34,383	29,816
Stock compensation expense	5,646	5,656
Deferred income taxes	656	27
Provision for doubtful accounts	160	(62)
Foreign currency transaction loss	43	126
Loss on disposal of assets	319	186
Changes in assets and liabilities
Accounts receivable	(522)	7,277
Inventories	5,502	(1,392)
Prepaid expenses and other current assets	1,996	2,068
Accounts payable and accrued expenses	2,404	(6,563)
Income taxes	(10,118)	(2,598)
Other	(700)	246
Net cash provided by operating activities	79,817	78,850
Cash flows from investing activities:
Cash paid for acquisition, net of cash acquired	(110,601)	0
Capital expenditures	(18,801)	(28,117)
Proceeds from insurance	1,000	0
Intangible assets acquired	(765)	(693)
Net cash used in investing activities	(129,167)	(28,810)
Cash flows from financing activities:
Proceeds from revolving loan	65,000	0
Principal payments on revolving loan	(37,000)	0
Principal payments on long-term debt	(26,250)	(26,250)
Principal payment on acquired debt	(884)	0
Proceeds from stock options exercised	5,985	11,901
Excess tax benefits from stock compensation	1,935	6,688
Dividends paid	(10,727)	(9,251)
Purchase of treasury stock	(1,478)	(1,131)
Net cash used in financing activities	(3,419)	(18,043)
Effect of exchange rate changes on cash	507	(728)
(Decrease) Increase in cash and cash equivalents	(52,262)	31,269
Cash and cash equivalents beginning of period	84,795	50,287
Cash and cash equivalents end of period	$ 32,533	$ 81,556