CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY (USD $) In Thousands, unless otherwise specified	Total	Capital Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2008	$ 336,144	$ 15,654	$ 19,264	$ 323,343	$ (22,117)
Comprehensive income (loss):
Net income (loss):	(62,870)			(62,870)
Other comprehensive income (loss):
Foreign currency translation, net of tax	1,732				1,732
Pension and OPEB, net of tax	11,225				11,225
Unrealized gain on marketable securities, net of tax	1,422				1,422
Unrealized (loss)/ gain on derivative instruments, net of tax	(688)				(688)
Total comprehensive income (loss)	(49,179)			(62,870)	13,691
Stock options exercised	1,054	37	1,017
Stock issued to directors	87	10	77
Shares issued	165	42	123
Stock-based compensation expense	4,679		4,679
Ending Balance at Dec. 31, 2009	243,771	15,743	25,160	197,603	5,265
Comprehensive income (loss):
Net income (loss):	34,571			34,571
Other comprehensive income (loss):
Foreign currency translation, net of tax	(4,589)				(4,589)
Pension and OPEB, net of tax	(2,286)				(2,286)
Unrealized gain on marketable securities, net of tax	1,612				1,612
Unrealized (loss)/ gain on derivative instruments, net of tax	142				142
Total comprehensive income (loss)	29,450			34,571	(5,121)
Stock options exercised	790	26	764
Stock issued to directors	28	38	(10)
Shares issued	686	34	652
Stock-based compensation expense	6,628		6,628
Ending Balance at Dec. 31, 2010	330,532	15,841	33,194	295,044	(13,547)
Comprehensive income (loss):
Net income (loss):	37,055			37,055
Other comprehensive income (loss):
Foreign currency translation, net of tax	(6,632)				(6,632)
Pension and OPEB, net of tax	(42,243)				(42,243)
Unrealized gain on marketable securities, net of tax	(110)				(110)
Unrealized (loss)/ gain on derivative instruments, net of tax	(270)				(270)
Total comprehensive income (loss)	(12,200)			37,055	(49,255)
Stock options exercised	11,071	330	10,741
Stock issued to directors	1	22	(21)
Shares issued	756	28	728
Stock-based compensation expense	8,096		8,096
Ending Balance at Dec. 31, 2011	$ 338,256	$ 16,221	$ 52,738	$ 332,099	$ (62,802)