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Fair Value Measurements - Financial Instruments Not Measure at Fair Value (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Carrying Value | Mortgages |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt instrument, fair value disclosure | $ 105,955 | $ 107,261
Carrying Value | Unsecured Debt | Term Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Line of credit and term loan, estimated fair value | 400,000 | 400,000
Carrying Value | Revolving line of credit | Revolving Credit Facility, Amended and Restated |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Line of credit and term loan, estimated fair value | 31,000 | 50,000
Estimated Fair Value | Mortgages |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt instrument, fair value disclosure | 104,938 | 106,494
Estimated Fair Value | Unsecured Debt | Term Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Line of credit and term loan, estimated fair value | 400,470 | 400,055
Estimated Fair Value | Revolving line of credit | Revolving Credit Facility, Amended and Restated |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Line of credit and term loan, estimated fair value | $ 31,062 | $ 50,032

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