Fair Values (Details 1) (Fair Value, Measurements, Nonrecurring [Member], USD $)	Jun. 30, 2012	Dec. 31, 2011
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Impaired loans	$ 33,366,000	$ 44,915,000
Foreclosed assets	11,545,000	15,282,000
Total	44,911,000	60,197,000
Level 1 [Member]
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Impaired loans	0	0
Foreclosed assets	0	0
Total	0	0
Level 2 [Member]
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Impaired loans	0	0
Foreclosed assets	0	0
Total	0	0
Level 3 [Member]
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis
Impaired loans	33,366,000	44,915,000
Foreclosed assets	11,545,000	15,282,000
Total	$ 44,911,000	$ 60,197,000