Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2008	$ 618	$ 694,296	$ (162,402)	$ (50,756)	$ 481,756
Comprehensive loss:
Net loss			(11,843)		(11,843)
Foreign currency translation adjustment				4,692	4,692
Pension adjustment, net of tax				6,243	6,243
Unrealized gain(loss) on securities, net of tax				137	137
Comprehensive loss:					(771)
ESPP		1,994			1,994
Stock based activity	4	7,300			7,304
Balance at Dec. 31, 2009	622	703,590	(174,245)	(39,684)	490,283
Comprehensive loss:
Net loss			(5,325)		(5,325)
Foreign currency translation adjustment				(2,457)	(2,457)
Pension adjustment, net of tax				(11,860)	(11,860)
Unrealized gain(loss) on securities, net of tax				(116)	(116)
Comprehensive loss:					(19,758)
Stock repurchase	(18)	(20,019)			(20,037)
ESPP		1,538			1,538
Stock based activity	21	9,182			9,203
Balance at Dec. 31, 2010	625	694,291	(179,570)	(54,117)	461,229
Comprehensive loss:
Net loss			(30,757)		(30,757)
Foreign currency translation adjustment				(5,852)	(5,852)
Pension adjustment, net of tax				(19,359)	(19,359)
Unrealized gain(loss) on securities, net of tax				(149)	(149)
Comprehensive loss:					(56,117)
Stock repurchase	(9)	(10,010)			(10,019)
ESPP		2,002			2,002
Stock based activity	20	11,314			11,334
Balance at Dec. 31, 2011	$ 636	$ 697,597	$ (210,327)	$ (79,477)	$ 408,429