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Fair Value Measurements - Schedule of Fair Value (Details) - Mortgage Debt - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Fair Value | AIG Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt fair value | $ 120,805 | $ 120,599
Fair Value | BofA/KeyBank Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt fair value | 256,299 | 249,566
Carrying Value | AIG Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt fair value | 126,970 | 126,970
Carrying Value | BofA/KeyBank Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt fair value | $ 250,000 | $ 250,000

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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
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