Loans (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of information pertaining to impaired loans
Impaired loans without a valuation allowance	$ 9,303	$ 3,410	$ 5,474
Impaired loans with a valuation allowance	6,472	9,029	11,745
Total impaired loans before valuation allowances	15,775	12,439	17,219
Valuation allowance related to impaired loans	2,108	2,434	3,178
Net impaired loans	13,667	10,005	14,041
Average recorded investment, net of allowance for loan losses	14,109	12,026	12,965
Interest income recognized	534	569	597
Interest income recognized on a cash basis on impaired loans