Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net earnings	$ 11,886	$ 15,172
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	11,016	10,026
Stock compensation expense	2,197	1,174
Deferred income taxes	0	4
Provision for doubtful accounts	49	(16)
Foreign currency transaction loss	50	34
Loss on disposal of assets	89	85
Changes in assets and liabilities
Accounts receivable	(1,049)	7,125
Inventories	1,257	(1,286)
Prepaid expenses and other current assets	386	1,322
Accounts payable and accrued expenses	7,065	(6,999)
Income taxes	(3,443)	(168)
Other	(180)	125
Net cash provided by operating activities	29,323	26,598
Cash flows from investing activities:
Cash paid for acquisition, net of cash acquired	(110,601)	0
Capital expenditures	(10,660)	(6,368)
Intangible assets acquired	(153)	(387)
Net cash used in investing activities	(121,414)	(6,755)
Cash flows from financing activities:
Proceeds from revolving loan	65,000	0
Principal payments on long-term debt	(9,634)	(8,750)
Proceeds from stock options exercised	1,345	3,175
Excess tax benefits from stock compensation	483	2,488
Dividends paid	(10,727)	(9,251)
Purchase of treasury stock	(615)	0
Net cash provided by (used in) financing activities	45,852	(12,338)
Effect of exchange rate changes on cash	616	(1,179)
(Decrease) Increase in cash and cash equivalents	(45,623)	6,326
Cash and cash equivalents beginning of period	84,795	50,287
Cash and cash equivalents end of period	$ 39,172	$ 56,613