Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Impaired Loans [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	$ 43,206	$ 25,694
Foreclosed Assets [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	237	501
Gains (Losses)	(84)
Other Real Estate Owned [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	9,559	16,222
Gains (Losses)	(1,226)	(562)
Level 1 Inputs [Member] | Impaired Loans [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis
Level 1 Inputs [Member] | Foreclosed Assets [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis
Level 1 Inputs [Member] | Other Real Estate Owned [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis
Level 2 Inputs [Member] | Impaired Loans [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis
Level 2 Inputs [Member] | Foreclosed Assets [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis
Level 2 Inputs [Member] | Other Real Estate Owned [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis
Level 3 Inputs [Member] | Impaired Loans [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	43,206	25,694
Level 3 Inputs [Member] | Foreclosed Assets [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	237	501
Level 3 Inputs [Member] | Other Real Estate Owned [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	$ 9,559	$ 16,222