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Significant Accounting Policies (Useful Lives Of Each Class Of Assets) (Detail) | 12 Months Ended
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Dec. 31, 2012
Minimum [Member] | Buildings And Site Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 2 years
Minimum [Member] | Leasehold Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 2 years
Minimum [Member] | Furniture And Fixtures [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 5 years
Minimum [Member] | Computer Equipment And Software [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 3 years
Maximum [Member] | Buildings And Site Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 31 years
Maximum [Member] | Leasehold Improvements [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 11 years
Maximum [Member] | Furniture And Fixtures [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 10 years
Maximum [Member] | Computer Equipment And Software [Member] |
Property, Plant and Equipment [Line Items] |
Property and equipment useful life | 10 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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
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Period Type: | duration