Fair Value Measurements on a Non-Recurring Basis (Details) (Non-Recurring Measurements, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned	$ 7,646	$ 13,983
Collateral-dependent impaired loans, net of ALLL	19,066	22,966
Total assets measured at fair value on a non-recurring basis	26,712	36,949
Level 1
Assets with a recorded change resulting from 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
Total assets measured at fair value on a non-recurring basis	0	0
Level 2
Assets with a recorded change resulting from 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
Total assets measured at fair value on a non-recurring basis	0	0
Level 3
Assets with a recorded change resulting from re-measuring at fair value on a non-recurring basis
Other real estate owned	7,646	13,983
Collateral-dependent impaired loans, net of ALLL	19,066	22,966
Total assets measured at fair value on a non-recurring basis	$ 26,712	$ 36,949