Accumulated Other Comprehensive Income (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			$ (2,060)
Accumulated other comprehensive (loss) income, Current period change	565	(3,422)	3,187	(3,976)
Accumulated other comprehensive (loss) income, Balance at June 30,2011	1,127		1,127
Foreign Currency Translation Adjustment [Member]
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			(1,214)
Accumulated other comprehensive (loss) income, Current period change			3,211
Accumulated other comprehensive (loss) income, Balance at June 30,2011	1,997		1,997
Minimum Pension Liability Adjustment
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			258
Accumulated other comprehensive (loss) income, Current period change			(62)
Accumulated other comprehensive (loss) income, Balance at June 30,2011	196		196
Unamortized Post Retirement Health Care Costs
Accumulated other comprehensive (loss) income, Balance at December 31, 2010			(1,104)
Accumulated other comprehensive (loss) income, Current period change			38
Accumulated other comprehensive (loss) income, Balance at June 30,2011	$ (1,066)		$ (1,066)