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Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details) (USD $)
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1 Months Ended | 9 Months Ended | 12 Months Ended | ||
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Feb. 28, 2010
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Sep. 30, 2010
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2009
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| Accounting Policies [Abstract] | |||||
| Impairment charges | $ 735,000 | $ 111,000 | $ 0 | $ 0.0 | $ 5,200,000 |
| Unrecorded Impairment Losses | $ 0 | ||||
| X | ||||||||||
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- Definition
Charges against earnings for both operating properties and properties classified as discontinued operations during the reporting period to reduce the carrying amount of real property to fair value. No definition available.
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| X | ||||||||||
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- Definition
Unrecorded Impairment Losses No definition available.
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| X | ||||||||||
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- Details
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