CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 4,492	$ 3,912
Adjustments to reconcile net income to net cash (used for) provided by operating activities:
Gain on sale of product line	0	(405)
Depreciation and amortization	3,345	3,564
Deferred income taxes	293	16
Stock based compensation	494	366
Changes in operating assets and liabilities:
Accounts receivable	(9,791)	(10,363)
Inventories	(6,681)	(2,348)
Accounts payable	4,135	4,478
Accrued payroll and other compensation	(1,625)	(831)
Accrued taxes	611	1,350
Other, net	1,510	874
Net cash (used for) provided by operating activities	(3,217)	613
Cash flows from investing activities:
Proceeds from maturity of short-term investment	0	12,015
Capital expenditures	(2,463)	(2,962)
Net cash (used for) provided by investing activities	(2,463)	9,053
Cash flows from financing activities:
Debt repayments	(218)	(360)
Common stock issued	653	2
Common stock repurchased	(342)	0
Excess tax benefit on stock awards	103	0
Net cash provided by (used for) financing activities	196	(358)
Effect of exchange rate changes on cash	(672)	553
(Decrease) increase in cash and cash equivalents	(6,156)	9,861
Cash and cash equivalents at beginning of period	63,623	30,905
Cash and cash equivalents at end of period	$ 57,467	$ 40,766