Property, Equipment, and Leasehold Improvement (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	$ 52,561	$ 41,373
Less accumulated depreciation and amortization	(31,892)	(26,458)
Property, equipment and leasehold improvements, net	20,669	14,915
Land
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	1,767	1,767
Building and leasehold improvements
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	5,500	4,797
Furniture, equipment, and automobile
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	4,408	3,612
Computer software and computer hardware
Property, Plant and Equipment [Line Items]
Property Plant and Equipment Gross	$ 40,886	$ 31,197

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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