Summary of Premises and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 90,463	$ 98,226
Less accumulated depreciation and amortization	(65,994)	(72,773)
Premises and equipment, net	24,469	25,453
Land and land improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	7,948	7,359
Office buildings
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	41,569	40,608
Furniture and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	36,666	45,758
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 4,280	$ 4,501

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.

+ References+ Details

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.

+ References+ Details

- 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.

+ References+ Details