CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Cash flows from operating activities:
Net income	$ 14,379	$ 11,111
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of discontinued operations, net of tax		(3,857)
Gain on sale of product line	(810)	(1,214)
Depreciation and amortization	10,346	11,541
Deferred income taxes	(687)	482
Stock based compensation	1,040	1,235
Loss on disposition of property, plant and equipment	101	9
Changes in operating assets and liabilities:
Accounts receivable	(11,136)	(11,776)
Inventories	810	(6,022)
Accounts payable	5,678	2,294
Accrued payroll and other compensation	(16)	(233)
Accrued taxes	401	1,154
Other, net	(895)	(2,650)
Net cash provided by operating activities	19,211	2,074
Cash flows from investing activities:
Proceeds from divestiture	0	13,982
Proceeds from maturity of short-term investment	12,015
Purchases of short-term investment	0	(12,000)
Proceeds from sale of product line	1,000	0
Capital expenditures	(7,945)	(5,945)
Reimbursement of cash from leasing company	0	818
Increase in restricted cash	0	(3,275)
Decrease in restricted cash	0	2,388
Net cash provided by (used for) investing activities	5,070	(4,032)
Cash flows from financing activities:
Debt repayments	(778)	(1,114)
Repurchases of common stock	(3,076)	0
Common stock issued	303	115
Net cash used for financing activities	(3,551)	(999)
Effect of exchange rate changes on cash	(124)	76
Increase (decrease) in cash and cash equivalents	20,606	(2,881)
Cash and cash equivalents at beginning of period	30,905	24,988
Cash and cash equivalents at end of period	$ 51,511	$ 22,107