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Commitments and Contingencies - Future Minimum Rental Payments Under Non-Cancelable Ground and Operating Leases (Phantoms) (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Minimum sublease rentals due in the future under non-cancelable subleases | $ 783

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- Definition Contractually required future rental payments receivable on noncancelable subleasing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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