Premises and Equipment, net - Summary of Premises and Equipment Balances (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 48,445	$ 48,515
Accumulated depreciation	(23,848)	(23,719)
Premises and equipment, net	24,597	24,796
Land [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	5,521	5,581
Building [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	19,589	19,541
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	3,808	4,309
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	12,891	12,640
Software [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	5,164	4,971
Bank automobiles [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	94	95
Capital lease asset [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 1,378	$ 1,378

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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