Securities (Details 1) (USD $) In Thousands, unless otherwise specified		12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012 Collateralized debt obligations [Member]
Fair values of securities held-to-maturity
Adjusted Amortized Cost		$ 1,149
Gross Unrealized Gains		941
Held-to-maturity, Fair Value, Total	$ 0	$ 2,090