Loans (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011 contracts	Dec. 31, 2010 contracts
Troubled Debt Restructurings That Subsequently Defaulted:
Number of Contracts, Subsequently Defaulted	2	0
Recorded Investment, Subsequently Defaulted	$ 742	$ 0
Commercial Loans [Member]
Troubled Debt Restructurings That Subsequently Defaulted:
Number of Contracts, Subsequently Defaulted	2	0
Recorded Investment, Subsequently Defaulted	$ 742	$ 0