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Summary of Significant Accounting Policies - Rental Property (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Accounting Policies [Abstract] | |||
| Buildings and improvements, estimated useful life | 33 years | ||
| Land improvements, estimated useful life | 15 years | ||
| Property, plant and equipment, estimated useful life, minimum | 7 years | ||
| Purchase price allocated to assets, useful life, maximum | 33 years | ||
| Interest costs incurred, capitalized | $ 1,600,000 | $ 1,200,000 | $ 393,000 |
| Internal development costs, capitalized | 2,200,000 | 1,800,000 | 1,400,000 |
| Real estate depreciation | $ 74,700,000 | $ 73,700,000 | $ 66,200,000 |
| X | ||||||||||
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- Definition
Buildings and Improvements, Estimated Useful Life No definition available.
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| X | ||||||||||
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- Definition
Internal Development Costs, Captialized No definition available.
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| X | ||||||||||
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- Definition
Land Improvements Useful Life No definition available.
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| X | ||||||||||
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- Definition
Purchase Price Allocated to Assets, Useful Life, Maximum No definition available.
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| X | ||||||||||
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- Definition
Real Estate Depreciation No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Amount of interest capitalized, including amount of allowance for funds used during construction. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. No definition available.
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