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BORROWINGS - Summary of Borrowings (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Instrument [Line Items] |  |
Long-term debt | $ 661,946 | $ 667,982
Mortgage notes and bonds payable |  |
Debt Instrument [Line Items] |  |
Principal Outstanding | 665,580 | 671,573
Debt issuance costs – notes and bonds payable | (3,734) | (3,691)
Long-term debt | 661,846 | 667,882
Notes payable to bank | Fixed-rate notes payable |  |
Debt Instrument [Line Items] |  |
Principal Outstanding | $ 583,114 | 582,665
Notes payable to bank | Fixed-rate notes payable | Minimum |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate | 2.44% |
Notes payable to bank | Fixed-rate notes payable | Maximum |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate | 5.70% |
Notes payable to bank | Fixed-rate notes payable | Weighted average |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate | 3.74% |
Notes payable to bank | Variable-rate notes payable |  |
Debt Instrument [Line Items] |  |
Principal Outstanding | $ 1,124 | 2,856
Stated Interest Rate | 3.25% |
Bonds payable | Fixed-rate bonds payable |  |
Debt Instrument [Line Items] |  |
Principal Outstanding | $ 81,342 | 86,052
Bonds payable | Fixed-rate bonds payable | Minimum |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate | 2.13% |
Bonds payable | Fixed-rate bonds payable | Maximum |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate | 4.57% |
Bonds payable | Fixed-rate bonds payable | Weighted average |  |
Debt Instrument [Line Items] |  |
Stated Interest Rate | 3.46% |
Line of credit | Variable-rate revolving lines of credit | Revolving credit facility |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 100 | $ 100
Stated Interest Rate | 2.97% |

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