CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities
Net income	$ 22,784	$ 18,622
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,052	12,955
Employee benefit plan provisions	893	1,871
Stock-based compensation	1,659	1,390
Deferred income tax expense	1,384	755
Restructuring (Note 1)	(42)
Restructuring cash payments (Note 1)	(3,091)
Changes in assets and liabilities - net of effects from foreign exchange:
Increase in receivables	(2,351)	(935)
Increase in inventories	(4,399)	(922)
Decrease (increase) in revenue in excess of billings on uncompleted contracts and other current assets	4,392	(6,570)
Decrease in accounts payable, accrued liabilities, and accrued interest	(18,333)	(61)
Pension contributions	(1,182)	(931)
Other items - net	2,033	(240)
Net cash provided by operating activities	17,799	25,934
Cash flows from investing activities
Proceeds from sale of business (Note 1)	642
Capital expenditures	(15,978)	(36,839)
Government grants received	1,709	947
Cash released from collateral		12
Net cash used in investing activities	(13,627)	(35,880)
Cash flows from financing activities
Proceeds from debt obligations	10,268
Reductions of debt obligations	(1,015)	(1,526)
Treasury stock purchased	(342)	(418)
Common stock issued	2,781	463
Excess tax benefit from stock-based compensation		(176)
Net cash (used in) provided by financing activities	(3,149)	10,978
Effect of exchange rate changes on cash and cash equivalents	1,580	1,969
Increase in cash and cash equivalents	2,603	3,001
Cash and cash equivalents, beginning of period	18,161	13,574
Cash and cash equivalents, end of period	20,764	16,575
Japanese Working Capital Loan
Cash flows from financing activities
Revolving credit facility borrowings short-term and long-term (Note 10)		10,546
Revolving credit facility repayments short-term and long-term (Note 10)	(16,291)	(8,411)
U.S. Revolving credit facility
Cash flows from financing activities
Revolving credit facility borrowings short-term and long-term (Note 10)	43,900	41,900
Revolving credit facility repayments short-term and long-term (Note 10)	$ (42,450)	$ (31,400)