Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Comprehensive Income
Net income	$ 16,188	$ 22,895	$ 20,492
Other comprehensive income (loss):
Pension liability adjustments (Net of tax: $356, $1,255, $34)	(765)	(2,254)	(74)
Foreign currency translation adjustment	1,724	(1,306)	117
Reclassification of market value adjustments for investments to earnings (Net of tax: $0, $0, $510)			(730)
Reclassification of unrealized derivative loss on cash flow hedges to earnings (Net of tax: $0, $0, ($7))			11
Total other comprehensive income (loss), net of tax:	959	(3,560)	(676)
Comprehensive income	$ 17,147	$ 19,335	$ 19,816