Consolidation and Integration Reserve (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of Consolidation and Integration Reserve
Consolidation and Integration Reserve , Beginning Balance	$ 1,706	$ 2,037
Adjustments against income	800	831	2,300
Payments	(1,222)	(1,162)
Consolidation and Integration Reserve , Ending Balance	$ 1,284	$ 1,706	$ 2,037