Deposits (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Summary of certificates of deposit with balances of $250,000 or more by maturity
Three months or less	$ 1,379	$ 3,440
Over three months to six months		309
Over six months to twelve months	2,744	1,776
Over twelve months	10,769	7,872
Total	$ 14,892	$ 13,397