Fair Value Measurements Fair Value Nonrecurring Basis (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of Real Estate Properties	1		3		1		3
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	$ 20,230	[1]	$ 18,297	[2]	$ 20,230	[1]	$ 18,297	[2]
Loans Receivable, Fair Value Adjustment	(4,598)		(2,144)		(5,186)		(5,526)
Other Real Estate Owned, Fair Value Disclosure	379	[3]	1,999	[4]	379	[3]	1,999	[4]
Other Real Estate Owned, Fair Value Adjustment	(102)		(228)		(102)		(2,352)
Assets, Fair Value Disclosure	20,609		20,296		20,609		20,296
Assets, Fair Value Adjustment	(4,700)		(2,372)		(5,288)		(7,878)
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	0	[1]	0	[2]	0	[1]	0	[2]
Other Real Estate Owned, Fair Value Disclosure	0	[3]	0	[4]	0	[3]	0	[4]
Assets, Fair Value Disclosure	0		0		0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	0	[1]	0	[2]	0	[1]	0	[2]
Other Real Estate Owned, Fair Value Disclosure	0	[3]	0	[4]	0	[3]	0	[4]
Assets, Fair Value Disclosure	0		0		0		0
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	20,230	[1]	18,297	[2]	20,230	[1]	18,297	[2]
Other Real Estate Owned, Fair Value Disclosure	379	[3]	1,999	[4]	379	[3]	1,999	[4]
Assets, Fair Value Disclosure	$ 20,609		$ 20,296		$ 20,609		$ 20,296

[1] (1)Collateral-dependent impaired loans held at September 30, 2012 that had write-downs in fair value or whose specific reserve changed during the first nine months of 2012.

[2] (1)Collateral-dependent impaired loans held at September 30, 2011 that had write-downs in fair value or whose specific reserve changed during the first nine months of 2011.

[3] (2)One OREO property held at September 30, 2012 had a write-down during the first nine months of 2012.

[4] (2)Three OREO properties held at September 30, 2011 had write-downs during the first nine months of 2011.