Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property and equipment, gross, excluding construction in progress	$ 68,822	$ 67,071
Less: accumulated depreciation and amortization	(38,660)	(32,558)
Property plant and equipment excluding construction in progress, net	30,162	34,513
Construction in progress	113	0
Property and equipment, net	30,275	34,513
Computers and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	15,875	14,733
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	33,317	32,982
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	8,660	8,555
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 10,970	$ 10,801

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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