Fair Value of Assets and Liabilities (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Major class of assets with a recorded change re-measuring at fair value on a non-recurring basis
Other real estate owned	$ 13,983
Collateral-dependent impaired loans, net of ALLL	22,966
Fair Value, Measurements, Nonrecurring [Member]
Major class of assets with a recorded change re-measuring at fair value on a non-recurring basis
Other real estate owned	13,983	38,076
Collateral-dependent impaired loans, net of ALLL	22,966	55,339
Goodwill		24,718
Total assets measured at fair value on a non-recurring basis	36,949	118,133
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Major class of assets with a recorded change re-measuring at fair value on a non-recurring basis
Other real estate owned	0	0
Collateral-dependent impaired loans, net of ALLL	0	0
Goodwill		0
Total assets measured at fair value on a non-recurring basis	0	0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Major class of assets with a recorded change re-measuring at fair value on a non-recurring basis
Other real estate owned	0	0
Collateral-dependent impaired loans, net of ALLL	0	0
Goodwill		0
Total assets measured at fair value on a non-recurring basis	0	0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Major class of assets with a recorded change re-measuring at fair value on a non-recurring basis
Other real estate owned	13,983	38,076
Collateral-dependent impaired loans, net of ALLL	22,966	55,339
Goodwill		24,718
Total assets measured at fair value on a non-recurring basis	$ 36,949	$ 118,133