Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Components of pension expense and related actuarial assumptions
Service cost, including plan expenses	$ 26	$ 26	$ 26
Interest cost	107	124	130
Expected return on plan assets	(99)	(105)	(114)
Recognized net actuarial loss	24	17	3
Settlement adjustment		92	36
Net periodic benefit cost	$ 58	$ 154	$ 81