Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Leasehold improvements	$ 62,906	$ 56,504
Construction in progress	2,883	3,472
Furniture and equipment	34,781	33,661
Computer equipment and software	92,563	85,962
Property, Plant and Equipment, Gross, Total	193,133	179,599
Accumulated depreciation and amortization	(124,941)	(105,151)
Property and equipment, net	$ 68,192	$ 74,448

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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