Premises and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Total Premises and Equipment, Gross	$ 168,665	$ 152,988
Accumulated depreciation	(93,207)	(86,991)
Total Premises and Equipment, Net	75,458	65,997
Land [Member]
Property, Plant and Equipment [Line Items]
Total Premises and Equipment, Gross	21,588	17,987
Buildings [Member]
Property, Plant and Equipment [Line Items]
Total Premises and Equipment, Gross	88,577	80,805
Equipment [Member]
Property, Plant and Equipment [Line Items]
Total Premises and Equipment, Gross	$ 58,500	$ 54,196

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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