Fair Value Measurements (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Impaired Loans [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	$ 43,125	$ 19,281
Foreclosed Assets [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	135	510
Gains (Losses)	(86)	1
Other Real Estate Owned [Member]
Assets measured at fair value on a nonrecurring basis
Assets measured at fair value on a nonrecurring basis	10,088	14,991
Gains (Losses)	(1,067)	291
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	43,125	19,281
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	135	510
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	$ 10,088	$ 14,991