Disclosures about Fair Value of Assets and Liabilities (Details 2) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Impaired loans [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Impaired loans	$ 15,824	$ 10,442
Other real estate owned [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Other real estate owned	233	2,486
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Impaired loans [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Impaired loans
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other real estate owned [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Other real estate owned
Significant Other Observable Inputs (Level 2) [Member] | Impaired loans [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Impaired loans
Significant Other Observable Inputs (Level 2) [Member] | Other real estate owned [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Other real estate owned
Significant Unobservable Inputs (Level 3) [Member] | Impaired loans [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Impaired loans	15,824	10,442
Significant Unobservable Inputs (Level 3) [Member] | Other real estate owned [Member]
Fair Value Measurements of Assets on a Nonrecurring Basis
Other real estate owned	$ 233	$ 2,486