Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Change in benefit obligation
Benefit obligation at beginning of year	$ 15,414	$ 15,545
Service cost	77	69	51
Interest cost	725	856	933
Benefits paid	(42)	(48)
Unrecognized prior service cost	(2,120)	(2,169)
Actuarial loss, net	1,147	1,161
Benefit obligation at end of year	15,201	15,414	15,545
Amounts recognized in the Consolidated Balance Sheets
Net liabilities included in other liabilities	(13,109)	(12,082)
Amounts recognized in accumulated other comprehensive loss	$ (2,092)	$ (3,332)