Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 55,540	$ 53,696
Less: accumulated depreciation	(38,059)	(36,078)
Total	17,481	17,618
Computer Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	47,422	45,790
Furniture, Equipment and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment gross	$ 8,118	$ 7,906

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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