Other Borrowings (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
As of end of period:
Wholesale structured repurchase agreements	$ 13,500	$ 13,500
Repurchase Agreements
As of end of period:
Weighted average rate	2.81%	2.98%
Highest month-end balance	20,728	32,644
Daily average balance	19,190	24,499
Weighted average rate	3.11%	2.63%
Wholesale Repurchase Agreements | JP Morgan Chase Bank N.A.
As of end of period:
Weighted average rate	4.235%
Wholesale structured repurchase agreements	13,500
Wholesale Repurchase Agreements Tranche 1 | JP Morgan Chase Bank N.A.
Securities Sold Under Repurchase Agreements and Wholesale Repurchase Agreements
Maturity Date	Nov. 01, 2014
As of end of period:
Weighted average rate	4.335%
Wholesale structured repurchase agreements	8,000
Wholesale Repurchase Agreements Tranche 2 | JP Morgan Chase Bank N.A.
Securities Sold Under Repurchase Agreements and Wholesale Repurchase Agreements
Maturity Date	Nov. 01, 2017
As of end of period:
Weighted average rate	4.09%
Wholesale structured repurchase agreements	$ 5,500