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	$ 9,814	$ 7,738
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	6,747	6,513
Employee benefit plan provisions	876	936
Stock-based compensation	946	622
Deferred income tax expense	740	1,146
Restructuring (Note 1)	(24)
Restructuring cash payments (Note 1)	(2,616)
Changes in assets and liabilities-net of effects from foreign exchange:
(Increase) decrease in receivables	(13,361)	2,834
Increase in inventories	(1,588)	(5,767)
Decrease (increase) in revenue in excess of billings on uncompleted contracts and other current assets	5,300	(4,212)
Decrease in accounts payable and accrued liabilities	(9,845)	(4,009)
Pension contributions	(456)	(397)
Other items - net	2,855	(238)
Net cash (used in) provided by operating activities	(612)	5,166
Cash flows from investing activities
Proceeds from sale of business (Note 1)	642
Capital expenditures	(10,617)	(11,811)
Government grants received	1,693	215
Net cash used in investing activities	(8,282)	(11,596)
Cash flows from financing activities
Proceeds of debt obligations	173
Reductions of debt obligations	(901)	(776)
Treasury stock purchased	(339)	(418)
Common stock issued	1,572	421
Excess tax benefit from stock-based compensation		(68)
Net cash provided by financing activities	3,065	5,141
Effect of exchange rate changes on cash and cash equivalents	2,222	(496)
Decrease in cash and cash equivalents	(3,607)	(1,785)
Cash and cash equivalents, beginning of period	18,161	13,574
Cash and cash equivalents, end of period	14,554	11,789
Japanese Working Capital Loan
Cash flows from financing activities
Revolving credit facility borrowings short-term and long-term (Note 10)		1,694
Revolving credit facility repayments short-term and long-term (Note 10)	(1,090)	(7,712)
U.S. Revolving credit facility
Cash flows from financing activities
Revolving credit facility borrowings short-term and long-term (Note 10)	28,200	21,600
Revolving credit facility repayments short-term and long-term (Note 10)	$ (24,550)	$ (9,600)