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Summary of Significant Accounting Policies (Intangible Assets) (Details) - Favorable Lease Rates	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Favorable lease rates, original useful lives	31 years 4 months 24 days	32 years 4 months 24 days
Minimum
Finite-Lived Intangible Assets [Line Items]
Favorable lease rates, original useful lives	41 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Favorable lease rates, original useful lives	52 years

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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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.

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