Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	$ 11,704	$ 10,355
Nonrecurring [Member] | Commercial real estate, Owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	1,957	1,606
Nonrecurring [Member] | Commercial real estate, Non-owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	728	2,017
Nonrecurring [Member] | Commercial real estate, Other[Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Commercial [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	937	41
Nonrecurring [Member] | Other real estate owned - Commercial real estate [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	270
Nonrecurring [Member] | Residential real estate, 1-4 family residential [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	57	76
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commercial real estate, Owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commercial real estate, Non-owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commercial real estate, Other[Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Commercial [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other real estate owned - Commercial real estate [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Residential real estate, 1-4 family residential [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial real estate, Owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial real estate, Non-owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial real estate, Other[Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Commercial [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other real estate owned - Commercial real estate [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Residential real estate, 1-4 family residential [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commercial real estate, Owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	1,957	1,606
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commercial real estate, Non-owner occupied [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	728	2,017
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commercial real estate, Other[Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commercial [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	937	41
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other real estate owned - Commercial real estate [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	0	270
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Residential real estate, 1-4 family residential [Member]
Fair value assets measured on non-recurring basis
Assets measured on non-recurring basis	$ 57	$ 76