Consolidated Statements Of Other Comprehensive Income (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Other Comprehensive Income [Abstract]
Net income (loss)	$ 6,914	$ 1,197	$ 23,128	$ (16,553)
Other comprehensive income (loss):
Foreign currency translation adjustment	(4,662)	4,151	(1,451)	(1,064)
Adjustment to retirement benefit liability, net of tax	(31)	19	(93)	50
Adjustment to post-retirement health care liability, net of tax	19	(1)	57	1
Reclassification of unrealized loss on interest rate swap, net of tax				1,206
Other comprehensive (loss) income	(4,674)	4,169	(1,487)	193
Total comprehensive income (loss)	$ 2,240	$ 5,366	$ 21,641	$ (16,360)