Goodwill and Other Intangible Assets Intangible Assets Schedule (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	$ 6,055	$ 6,373	$ 7,756
Finite-Lived Intangible Assets, Gross	17,479	17,479	17,479
Finite-Lived Intangible Assets, Accumulated Amortization	(11,424)	(11,106)	(9,723)
Core Deposits [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	5,911	6,213	7,513
Finite-Lived Intangible Assets, Gross	16,759	16,759	16,759
Finite-Lived Intangible Assets, Accumulated Amortization	(10,848)	(10,546)	(9,246)
Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	19	26	32
Finite-Lived Intangible Assets, Gross	102	102	102
Finite-Lived Intangible Assets, Accumulated Amortization	(83)	(76)	(70)
Lease Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	125	134	211
Finite-Lived Intangible Assets, Gross	618	618	618
Finite-Lived Intangible Assets, Accumulated Amortization	$ (493)	$ (484)	$ (407)