Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net periodic benefit cost for both the Executive Retirement Plan and the Outside Director Plan
Service cost	$ 86	$ 77	$ 69
Interest cost	597	725	856
Amortization of prior service cost	(1,189)	(723)
Amortization of net gain	1,380	990	929
Total	874	1,069	1,854
Net gain recognized in Accumulated other comprehensive income (loss)	(2,143)	(1,240)	(1,937)
Total recognized in net periodic benefit gain and Accumulated other comprehensive income (loss)	$ (1,269)	$ (171)	$ (83)