CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income	$ 10,504	$ 9,980
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)	(810)
Depreciation and amortization	6,989	7,872
Deferred income taxes	(467)	957
Stock based compensation	846	808
Loss on disposition of property, plant and equipment	17	2
Changes in operating assets and liabilities:
Accounts receivable	(9,428)	(11,091)
Inventories	215	(334)
Accounts payable	4,041	801
Accrued payroll and other compensation	935	604
Accrued taxes	549	2,248
Other, net	(864)	(1,413)
Net cash provided by operating activities	12,527	5,767
Cash flows from investing activities:
Proceeds from divestiture		12,811
Capital expenditures	(5,785)	(3,338)
Reimbursement of cash from leasing company		818
Proceeds from maturity of short-term investment	12,015
Increase in restricted cash		(3,275)
Net cash provided by investing activities	6,230	7,016
Cash flows from financing activities:
Debt repayments	(573)	(739)
Repurchases of common stock	(2,712)
Common stock issued	203	73
Net cash used for financing activities	(3,082)	(666)
Effect of exchange rate changes on cash	(525)	1,175
Increase in cash and cash equivalents	15,150	13,292
Cash and cash equivalents at beginning of period	30,905	24,988
Cash and cash equivalents at end of period	$ 46,055	$ 38,280