Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 13,574	$ 33,992
Restricted cash	1,152	1,173
Receivables, net of allowance for losses of $1,200 and $1,743	102,540	94,354
Revenue recognized in excess of billings on uncompleted contracts	9,911	7,461
Inventories	118,348	101,693
Deferred income taxes- current	19,190	19,668
Other current assets	13,226	13,707
Total current assets	277,941	272,048
Property, plant and equipment, net	234,549	186,834
Intangibles, net	7,579	8,615
Goodwill	26,839	26,910
Deferred income taxes - long-term	2,805	2,387
Other assets	3,277	4,769
Total assets	552,990	501,563
Current liabilities:
Accounts payable and accrued liabilities	72,437	65,921
Billings in excess of revenue recognized on uncompleted contracts	4,183	2,971
Payroll and benefits payable	12,178	10,978
Accrued income taxes	923	659
Short-term debt	22,894	21,442
Current portion of long-term debt	3,372	3,203
Total current liabilities	115,987	105,174
Long-term debt	1,103	3,721
Deferred income taxes - long-term	14,771	6,979
Accrued pension and other liabilities	44,012	42,451
Total liabilities	175,873	158,325
Redeemable non-controlling interest (Note 2)		274
Commitments and contingencies (Notes 8 and 16)
Shareholders' equity:
Common shares, $.01 par value, 100,000,000 shares authorized, 59,381,636 and 58,989,578 shares issued	594	590
Additional paid-in capital	174,074	169,284
Retained earnings	247,239	208,015
Accumulated other comprehensive loss	(13,517)	(4,074)
Total of shareholder's equity before adjusting treasury stock	408,390	373,815
Treasury stock, at cost, 3,100,419 and 3,070,720 shares	(31,273)	(30,851)
Total shareholders' equity	377,117	342,964
Total liabilities and shareholders' equity	$ 552,990	$ 501,563