Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net earnings	$ 8,894	$ 10,888
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	2,631	2,621
Stock compensation expense	988	1,076
Deferred income taxes	55	(623)
Foreign currency transaction loss	36	48
Changes in assets and liabilities
Accounts receivable	(4,387)	(3,983)
Inventories	(50)	(3,260)
Prepaid expenses and other current assets	526	782
Accounts payable and accrued expenses	400	(3,715)
Income taxes	1,123	550
Other	24	(31)
Net cash provided by operating activities	10,240	4,353
Cash flows from investing activities:
Deposit held in escrow	(5,500)	0
Capital expenditures	(1,138)	(3,400)
Intangible assets acquired	(27)	(33)
Net cash used in investing activities	(6,665)	(3,433)
Cash flows from financing activities:
Repayments of short-term obligations	(89)	(89)
Proceeds from stock options exercised	1,327	2,097
Excess tax benefits from stock compensation	1,689	1,491
Dividends paid	(7,856)	0
Purchase of treasury stock	(33)	(27)
Net cash (used in) provided by financing activities	(4,962)	3,472
Effect of exchange rate changes on cash	(30)	(39)
(Decrease) increase in cash and cash equivalents	(1,417)	4,353
Cash and cash equivalents beginning of period	208,747	144,737
Cash and cash equivalents end of period	$ 207,330	$ 149,090