Loans (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Loans Details 2
Impaired loans without a valuation allowance	$ 3,410	$ 5,474	$ 8,773
Impaired loans with a valuation allowance	9,029	11,745	2,643
Total impaired loans before valuation allowances	12,439	17,219	11,416
Valuation allowance related to impaired loans	2,434	3,178	1,496
Net impaired loans	10,005	14,041	9,920
Average recorded investment, net of allowance for loan losses	12,026	12,965	10,122
Interest income recognized	569	597	421
Interest income recognized on a cash basis on impaired loans