Bank Premises and Equipment (Net Book Value) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Total bank premises and equipment	$ 60,771	$ 56,191
Accumulated depreciation	(33,758)	(32,286)
Bank premises and equipment, net	27,013	23,905
Land [Member]
Property, Plant and Equipment [Line Items]
Total bank premises and equipment	7,039	5,662
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Total bank premises and equipment	34,943	32,046
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total bank premises and equipment	$ 18,789	$ 18,483

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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