Accumulated Other Comprehensive Income (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			$ (2,060)
Accumulated other comprehensive (loss) income, Current period change	(4,674)	4,169	(1,487)	193
Accumulated other comprehensive (loss) income, Balance as of September 30, 2011	(3,547)		(3,547)
Foreign Currency Translation Adjustment [Member]
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			(1,214)
Accumulated other comprehensive (loss) income, Current period change			(1,451)
Accumulated other comprehensive (loss) income, Balance as of September 30, 2011	(2,665)		(2,665)
Minimum Pension Liability Adjustment [Member]
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			258
Accumulated other comprehensive (loss) income, Current period change			(93)
Accumulated other comprehensive (loss) income, Balance as of September 30, 2011	165		165
Unamortized Post-Retirement Health Care Costs [Member]
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			(1,104)
Accumulated other comprehensive (loss) income, Current period change			57
Accumulated other comprehensive (loss) income, Balance as of September 30, 2011	$ (1,047)		$ (1,047)