Fair Value (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Subsequent Event [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Mar. 31, 2012 Subsequent Event [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Mar. 31, 2013 Subsequent Event [Member] Significant Other Observable Inputs (Level 2) [Member]	Mar. 31, 2012 Subsequent Event [Member] Significant Other Observable Inputs (Level 2) [Member]	Mar. 31, 2013 Subsequent Event [Member] Significant Unobservable Inputs (Level 3) [Member]	Mar. 31, 2012 Subsequent Event [Member] Significant Unobservable Inputs (Level 3) [Member]	Mar. 31, 2013 Subsequent Event [Member] Carrying Amount [Member]	Mar. 31, 2012 Subsequent Event [Member] Carrying Amount [Member]
Financial Assets
Securities held to maturity	$ 0	$ 13,818		$ 0		$ 19,426		$ 0		$ 18,801
Loans, net	1,202,270	1,203,977	0	0	0	0	1,200,845	1,173,840	1,179,669	1,158,829
Financial Liabilities
Deposit liabilities			0	0	0	0	1,764,018	1,740,367	1,762,164	1,737,459
Borrowings			0	0	55,299	55,183	0	0	50,000	50,000
Subordinated debt			$ 0	$ 0	$ 37,527	$ 32,166	$ 0	$ 0	$ 53,610	$ 53,610