Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net earnings	$ 26,036	$ 30,088
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	22,666	19,891
Stock compensation expense	3,949	2,684
Deferred income taxes	293	55
Provision for doubtful accounts	108	(106)
Foreign currency transaction loss	15	60
Loss on disposal of assets	88	106
Changes in assets and liabilities
Accounts receivable	1,071	7,962
Inventories	3,992	1,378
Prepaid expenses and other current assets	1,295	1,396
Accounts payable and accrued expenses	3,627	(9,786)
Income taxes	(6,573)	(4,046)
Other	(609)	184
Net cash provided by operating activities	55,958	49,866
Cash flows from investing activities:
Cash paid for acquisition, net of cash acquired	(110,601)	0
Capital expenditures	(14,736)	(15,299)
Intangible assets acquired	(586)	(617)
Net cash used in investing activities	(125,923)	(15,916)
Cash flows from financing activities:
Proceeds from revolving loan	65,000	0
Principal payments on revolving loan	(20,000)	0
Principal payments on long-term debt	(17,500)	(17,500)
Principal payment on acquired debt	(884)	0
Proceeds from stock options exercised	3,032	9,920
Excess tax benefits from stock compensation	792	5,785
Dividends paid	(10,727)	(9,251)
Purchase of treasury stock	(1,478)	(21)
Net cash provided by (used in) financing activities	18,235	(11,067)
Effect of exchange rate changes on cash	356	(927)
(Decrease) Increase in cash and cash equivalents	(51,374)	21,956
Cash and cash equivalents beginning of period	84,795	50,287
Cash and cash equivalents end of period	$ 33,421	$ 72,243