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Summary of Significant Accounting Policies - Useful Lives for Major Categories of Property and Equipment (Detail) | 12 Months Ended
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Dec. 31, 2016
Land Improvements | Lower end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 50 years
Land Improvements | Upper end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 50 years
Buildings | Lower end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 28 years
Buildings | Upper end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 40 years
Building Improvements and Fixtures | Lower end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 3 years
Building Improvements and Fixtures | Upper end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 10 years
Furniture Equipment And Purchased Software | Lower end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 3 years
Furniture Equipment And Purchased Software | Upper end |
Property and Equipment [Line Items] |
Property and equipment, useful life | 5 years

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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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- Details
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- Details
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