Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, net of tax, Balance as of December 31, 2012	$ (1,575)
Accumulated other comprehensive (loss) income, net of tax, Current period change	(3,057)	1,953
Accumulated other comprehensive (loss) income, net of tax, Balance as of March 31, 2013	(4,632)
Foreign Currency Translation Adjustment [Member]
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, net of tax, Balance as of December 31, 2012	(93)
Accumulated other comprehensive (loss) income, net of tax, Current period change	(3,097)
Accumulated other comprehensive (loss) income, net of tax, Balance as of March 31, 2013	(3,190)
Minimum Pension Liability Adjustment [Member]
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, net of tax, Balance as of December 31, 2012	(8)
Accumulated other comprehensive (loss) income, net of tax, Current period change	2
Accumulated other comprehensive (loss) income, net of tax, Balance as of March 31, 2013	(6)
Unamortized Post-Retirement Health Care Costs [Member]
Component of Other Income, Nonoperating [Line Items]
Accumulated other comprehensive (loss) income, net of tax, Balance as of December 31, 2012	(1,474)
Accumulated other comprehensive (loss) income, net of tax, Current period change	38
Accumulated other comprehensive (loss) income, net of tax, Balance as of March 31, 2013	$ (1,436)