Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
After-tax components of accumulated comprehensive income [Abstract]
Foreign currency translation adjustment	$ 4,679	$ 4,851
Unrecognized pension and post-retirement benefit cost, net of tax of $2,471 and $2,482, respectively	(4,177)	(4,010)
Accumulated other comprehensive income	502	841
Unrecognized pension and post-retirement benefit cost, tax	$ 2,471	$ 2,482