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Fair Value Measurements - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Mortgages Payable | Fair Value |  |
Financial liabilities: |  |
Financial liabilities | $ 1,223,797 | $ 1,162,890
Mortgages Payable | Carrying Amount |  |
Financial liabilities: |  |
Financial liabilities | 1,300,626 | 1,127,848
Revolving Credit Facility | Fair Value |  |
Financial liabilities: |  |
Financial liabilities | 196,930 | 200,177
Revolving Credit Facility | Carrying Amount |  |
Financial liabilities: |  |
Financial liabilities | 200,000 | 200,000
Tranche A-1 Term Loan | Fair Value |  |
Financial liabilities: |  |
Financial liabilities | 296,208 | 300,607
Tranche A-1 Term Loan | Carrying Amount |  |
Financial liabilities: |  |
Financial liabilities | $ 300,000 | $ 300,000

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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=118260190&loc=d3e13433-108611 + Details
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