Consolidated Statements Of Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Other Comprehensive Income [Abstract]
Net income (loss)	$ 16,523	$ (91,068)	$ (52,025)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(1,232)	(591)	7,057
Adjustment to retirement benefit liability, net of tax	(187)	277	17
Adjustment to post-retirement healthcare benefit liability, net of tax	129	(722)	301
Reclassification of unrealized loss on interest rate swap, net of tax		1,206	1,220
Other comprehensive (loss) income	(1,290)	170	8,595
Total comprehensive income (loss)	$ 15,233	$ (90,898)	$ (43,430)