Consolidated Statement of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balances at Dec. 31, 2008	$ 54,900	$ 330	$ 527,000	$ (510,160)	$ 37,730
Comprehensive Income:
Net income (loss)	(220)			(220)
Foreign currency translation	7,620				7,620
Defined pension and postretirement pension plans, net of tax (Note 16)	(750)				(750)
Amortization of unrealized loss on interest rate swaps, net of tax (Note 12)	(940)				(940)
Total comprehensive income	5,710
Shares surrendered upon vesting of options and restricted stock awards to cover tax obligations	0
Reclassification of compensation expense to be paid in restricted shares of common stock (Note 17)	790		790
Non-cash compensation expense	580		580
Balances at Dec. 31, 2009	61,980	330	528,370	(510,380)	43,660
Comprehensive Income:
Net income (loss)	45,270			45,270
Foreign currency translation	1,690				1,690
Defined pension and postretirement pension plans, net of tax (Note 16)	(720)				(720)
Amortization of unrealized loss on interest rate swaps, net of tax (Note 12)	1,430				1,430
Total comprehensive income	47,670
Shares surrendered upon vesting of options and restricted stock awards to cover tax obligations	(240)		(240)
Stock option exercises and restricted stock vestings	130	10	120
Excess tax benefits from stock based compensation	600		600
Non-cash compensation expense	2,180		2,180
Balances at Dec. 31, 2010	112,320	340	531,030	(465,110)	46,060
Comprehensive Income:
Net income (loss)	60,360			60,360
Foreign currency translation	(3,590)				(3,590)
Defined pension and postretirement pension plans, net of tax (Note 16)	(3,120)				(3,120)
Amortization of unrealized loss on interest rate swaps, net of tax (Note 12)	230				230
Total comprehensive income	53,880
Shares surrendered upon vesting of options and restricted stock awards to cover tax obligations	(900)		(900)
Stock option exercises and restricted stock vestings	1,000	10	990
Excess tax benefits from stock based compensation	3,980		3,980
Non-cash compensation expense	3,510		3,510
Balances at Dec. 31, 2011	$ 173,790	$ 350	$ 538,610	$ (404,750)	$ 39,580