Comprehensive Income (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Components of accumulated other comprehensive income
Net unrealized gains on available-for-sale securities	$ 10,226	$ 10,530
Tax effect	(4,299)	(4,427)
Unrealized holding gains on available-for-sale securities, net of tax	5,927	6,103
Pension liability	(3,802)	(3,802)
Tax effect	1,598	1,598
Pension liability, net of tax	(2,204)	(2,204)
Joint beneficiary agreement liability	(152)	(152)
Tax effect	64	64
Joint beneficiary agreement liability, net of tax	(88)	(88)
Accumulated other comprehensive income (loss)	$ 3,635	$ 3,811