Fair Value (Assets measured at fair value on nonrecurring basis) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Impaired loans [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis	$ 100	$ 206
Total fair value gain (loss)	(195)	308
Other real estate owned ("OREO") [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis	1,177	1,284
Total fair value gain (loss)	(139)
Assets Held-for-sale [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis	357
Total fair value gain (loss)	443
Fair Value on a Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired loans [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis
Fair Value on a Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other real estate owned ("OREO") [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis
Fair Value on a Nonrecurring Basis [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Assets Held-for-sale [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis
Fair Value on a Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Impaired loans [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis
Fair Value on a Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other real estate owned ("OREO") [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis
Fair Value on a Nonrecurring Basis [Member] | Significant Other Observable Inputs (Level 2) [Member] | Assets Held-for-sale [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis
Fair Value on a Nonrecurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Impaired loans [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis	100	206
Fair Value on a Nonrecurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other real estate owned ("OREO") [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis	1,177	1,284
Fair Value on a Nonrecurring Basis [Member] | Significant Unobservable Inputs (Level 3) [Member] | Assets Held-for-sale [Member]
Assets carried on the consolidated statements for which a nonrecurring change in fair value has been recorded
Assets measured on non-recurring basis	$ 800