Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net earnings	$ 29,269	$ 23,861
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	6,872	6,334
Stock compensation expense	2,840	2,987
Shares issued under employee benefit plans	398	353
Deferred income tax expense	(716)	(1,402)
(Recovery of) provision for doubtful accounts	(7)	(160)
Foreign currency transaction (gain) loss	180	(30)
Loss on impairment of assets	92	0
Changes in assets and liabilities
Accounts receivable	(4,270)	162
Inventories	(2,652)	(1,230)
Prepaid expenses and other current assets	960	592
Accounts payable and accrued expenses	(800)	(1,064)
Income taxes	1,157	(1,384)
Other	757	312
Net cash provided by operating activities	34,080	29,331
Cash flows from investing activities:
Capital expenditures	(4,851)	(6,004)
Proceeds from sale of property, plant and equipment	28	0
Acquisition of a business	0	(4,661)
Intangible assets acquired	(23)	(7)
Net cash used in investing activities	(4,846)	(10,672)
Cash flows from financing activities:
Principal payments on long-term debt	(1,182)	(978)
Proceeds from stock options exercised and restricted shares purchased	2,600	2,486
Excess tax benefits from stock compensation	1,392	2,218
Dividends paid	(4,310)	(3,091)
Purchase of treasury stock	(108)	0
Net cash used in financing activities	(1,608)	635
Effect of exchange rate changes on cash	(7)	(279)
Increase in cash and cash equivalents	27,619	19,015
Cash and cash equivalents beginning of year	77,253	46,432
Cash and cash equivalents end of year	$ 104,872	$ 65,447