Accumulated Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (13,948)
Before Reclassification [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	(258)
Other Comprehensive Income (Loss), before Reclassification and Tax	(521)
Reclassification [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	162
Other Comprehensive Income (Loss), Adjustment, Net of Tax	162
Net current period other comprehensive income (loss), net of tax	(359)
Accumulated other comprehensive income (loss)	(14,307)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(15,532)
Before Reclassification [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	0
Reclassification [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(162)
Net current period other comprehensive income (loss), net of tax	162
Accumulated other comprehensive income (loss)	(15,370)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	1,584
Before Reclassification [Abstract]
Cumulative foreign currency translation adjustment	(521)
Reclassification [Abstract]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	0
Net current period other comprehensive income (loss), net of tax	(521)
Accumulated other comprehensive income (loss)	$ 1,063