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	$ 18,622	$ 19,768
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,955	11,195
Employee benefit plan provisions	1,871	832
Stock-based compensation	1,390	1,305
Deferred income tax	755	6,202
Changes in assets and liabilities - net of effects from foreign exchange:
(Increase) decrease in receivables	(935)	4,336
Increase in inventories	(922)	(9,240)
Increase in revenue in excess of billings on uncompleted contracts and other current assets	(6,570)	(1,707)
Decrease in accounts payable, accrued liabilities, and accrued interest	(61)	(9,378)
Pension contributions	(931)	(3,690)
Other items - net	(240)	(4)
Net cash provided by operating activities	25,934	19,619
Cash flows from investing activities
Property, plant and equipment expenditures	(36,839)	(36,246)
Government grants received	947
Cash released from collateral	12
Net cash used in investing activities	(35,880)	(36,246)
Cash flows from financing activities
Revolving credit facility borrowings	52,446	147,086
Revolving credit facility repayments	(39,811)	(149,250)
Proceeds from debt obligations		373
Reductions of debt obligations	(1,526)	(1,724)
Treasury stock purchased	(418)	(422)
Common stock issued	463	117
Excess tax benefit from stock-based compensation	(176)	116
Net cash provided by (used in) financing activities	10,978	(3,704)
Effect of exchange rate changes on cash and cash equivalents	1,969	266
Increase (decrease) in cash and cash equivalents	3,001	(20,065)
Cash and cash equivalents, beginning of period	13,574	33,992
Cash and cash equivalents, end of period	$ 16,575	$ 13,927