Restructuring Activities (Details) (Facility Consolidation Costs [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Facility Consolidation Costs [Member]
Restructuring plan related to discontinued operations
Restructuring reserve, Beginning Balance	$ 366	$ 938	$ 0
Accrued and expensed			835
Charged against accrual	(281)	(447)
Adjustments and revisions	39	(125)	103
Restructuring reserve, Ending Balance	$ 124	$ 366	$ 938