Employee Benefit Plans (Details 2) (Pension Plan, USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Pension Plan
Net loss	$ 3,380	$ 16,213
Net transition obligation		32
Prior service cost		44
Amount recognized in AOCI before tax effect	3,380	16,289
Tax benefit	(1,317)	(6,434)
Net amount recognized as reduction to AOCI	$ 2,063	$ 9,855