Acquisitions (Intangible Assets Arising From Aquisition) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets, Net	$ 3,587	$ 1,955
Core Deposits
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets	11,225
Finite-Lived Intangible Assets, Accumulated Amortization	(10,564)
Intangible Assets, Net	661
Customer Relationships
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets	7,190
Finite-Lived Intangible Assets, Accumulated Amortization	(6,121)
Intangible Assets, Net	1,069
Other Intangible Assets
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Finite-Lived Intangible Assets	18,415
Finite-Lived Intangible Assets, Accumulated Amortization	(16,685)
Intangible Assets, Net	1,730
Mortgage Servicing Rights
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible Assets, Net	$ 1,857