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Depreciation Expense Computed Using Straight-Line Method over Useful Lives (Detail) | 12 Months Ended
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Dec. 31, 2012
Computer Hardware | Minimum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property and equipment, estimated useful lives (in years) | 2 years
Computer Hardware | Maximum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property and equipment, estimated useful lives (in years) | 3 years
Computer Software | Minimum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property and equipment, estimated useful lives (in years) | 2 years
Computer Software | Maximum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property and equipment, estimated useful lives (in years) | 5 years
Furniture and Equipment |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property and equipment, estimated useful lives (in years) | 5 years
Leasehold Improvements | Maximum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property and equipment, estimated useful lives (in years) | 5 years

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- Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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