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FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Not Measured at Fair Value (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
FINANCIAL LIABILITIES |  |
Unsecured senior notes | $ 299,359 | $ 299,344
Mortgages payable | 870,963 |
Carrying Amount |  |
FINANCIAL ASSETS |  |
Cash and cash equivalents and restricted cash | 13,313 | 31,267
FINANCIAL LIABILITIES |  |
Revolving lines of credit | 46,000 | 76,000
Unsecured senior notes | 300,000 | 300,000
Carrying Amount | Mortgages | Mortgages payable - Fannie Mae |  |
FINANCIAL LIABILITIES |  |
Mortgages payable | 198,850 | 198,850
Carrying Amount | Mortgages | Mortgages payable - other |  |
FINANCIAL LIABILITIES |  |
Mortgages payable | 326,113 | 284,934
Carrying Amount | Restricted cash |  |
FINANCIAL ASSETS |  |
Cash and cash equivalents and restricted cash | 2,409 | 7,358
Fair Value |  |
FINANCIAL ASSETS |  |
Cash and cash equivalents and restricted cash | 13,313 | 31,267
FINANCIAL LIABILITIES |  |
Revolving lines of credit | 46,000 | 76,000
Unsecured senior notes | 273,973 | 308,302
Fair Value | Mortgages | Mortgages payable - Fannie Mae |  |
FINANCIAL LIABILITIES |  |
Mortgages payable | 176,055 | 198,850
Fair Value | Mortgages | Mortgages payable - other |  |
FINANCIAL LIABILITIES |  |
Mortgages payable | 308,363 | 284,546
Fair Value | Restricted cash |  |
FINANCIAL ASSETS |  |
Cash and cash equivalents and restricted cash | $ 2,409 | $ 7,358

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