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Property and Equipment Estimated Useful Lives using Straight-Line Method (Detail) | 12 Months Ended
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Dec. 31, 2011 Year
Computer and office equipment |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, minimum useful lives | 3
Property, plant and equipment, maximum useful lives | 5
Furniture and fixtures |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful lives | 7
Leasehold improvements |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, useful lives | Lesser of useful life of improvement or remaining term of lease
Vehicles and other |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, minimum useful lives | 4
Property, plant and equipment, maximum useful lives | 5

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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2155824 + Details
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- Details
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- Definition The average useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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- Definition The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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- Definition The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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