PREMISES AND EQUIPMENT (Details) (USD $)			3 Months Ended
Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2012 Furniture, fixtures and equipment Y	Mar. 31, 2012 Office Equipment Y	Mar. 31, 2012 Building and Building Improvements Y
Premises and equipment disclosures
Premises and equipment, gross	$ 178,900,000	$ 178,600,000
Accumulated depreciation and amortization	62,600,000	59,700,000
Premises and equipment, net	$ 116,266,000	$ 118,926,000
Estimated useful life (in years)			7	5	25

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, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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