Property and Equipment Including Leasehold Improvements and Capitalized Software Development Costs (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment	$ 27,432	$ 21,866
Less: Accumulated depreciation and amortization	(17,525)	(14,335)
Property and equipment, net	9,907	7,531
Software
Property, Plant and Equipment [Line Items]
Property and equipment	17,334	12,998
Computer Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	5,208	4,897
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property and equipment	1,863	1,760
Telephone equipment
Property, Plant and Equipment [Line Items]
Property and equipment	728	707
Office Equipment
Property, Plant and Equipment [Line Items]
Property and equipment	1,432	625
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property and equipment	241	224
Web site development costs
Property, Plant and Equipment [Line Items]
Property and equipment	$ 626	$ 655

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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