Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance, value at Dec. 31, 2008	$ 301	$ 223,561	$ 356,007	$ (10,825)	$ (557)	$ 568,487
Balance, shares at Dec. 31, 2008	30,062,000				75,000
Net income (loss)			(52,025)			(52,025)
Foreign currency translation adjustment				7,057		7,057
Adjustment to retirement benefit liability, net of taxes				17		17
Adjustment to post-retirement healthcare benefit liability, net of taxes				301		301
Reclassification of unrealized loss on interest rate swap, net of tax				1,220		1,220
Stock compensation expense		4,407				4,407
Net settlement of restricted stock units, value	2	(2)			(634)	(634)
Net settlement of restricted stock units, shares	222,000				76,000
Issuance of restricted stock, shares	6,000
Stock options exercised, value		47				47
Stock options exercised, shares	5,000					5,025
Tax effect from stock compensation		(651)				(651)
Balance, value at Dec. 31, 2009	303	227,362	303,982	(2,230)	(1,191)	528,226
Balance, shares at Dec. 31, 2009	30,295,000				151,000
Net income (loss)			(91,068)			(91,068)
Foreign currency translation adjustment				(591)		(591)
Adjustment to retirement benefit liability, net of taxes				277		277
Adjustment to post-retirement healthcare benefit liability, net of taxes				(722)		(722)
Reclassification of unrealized loss on interest rate swap, net of tax				1,206		1,206
Stock compensation expense		4,315				4,315
Net settlement of restricted stock units, value	2	(2)			(1,114)	(1,114)
Net settlement of restricted stock units, shares	187,000				68,000
Issuance of restricted stock, shares	6,000
Stock options exercised, value		270				270
Stock options exercised, shares	28,000					28,586
Tax effect from stock compensation		54				54
Balance, value at Dec. 31, 2010	305	231,999	212,914	(2,060)	(2,305)	440,853
Balance, shares at Dec. 31, 2010	30,516,000				219,000
Net income (loss)			16,523			16,523
Foreign currency translation adjustment				(1,232)		(1,232)
Adjustment to retirement benefit liability, net of taxes				(187)		(187)
Adjustment to post-retirement healthcare benefit liability, net of taxes				129		129
Reclassification of unrealized loss on interest rate swap, net of tax
Stock compensation expense		4,642				4,642
Net settlement of restricted stock units, value	2	(2)			(826)	(826)
Net settlement of restricted stock units, shares	177,000				62,000
Issuance of restricted stock, shares	6,000
Stock options exercised, value		34				34
Stock options exercised, shares	3,000					3,375
Balance, value at Dec. 31, 2011	$ 307	$ 236,673	$ 229,437	$ (3,350)	$ (3,131)	$ 459,936
Balance, shares at Dec. 31, 2011	30,702,000				281,000