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LEASES - As Lessor - Lease Termination Fees (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jan. 31, 2021 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Lease Termination Fee |  |  |  |
Revenue |  | $ 20,816,000 | $ 21,239,000 |
Retail tenants |  |  |  |
Lease Termination Fee |  |  |  |
Payments received upon early lease termination | $ 350,000 |  |  |
Industrial tenants |  |  |  |
Lease Termination Fee |  |  |  |
Payments received upon early lease termination |  |  |  | $ 88,000
Rental income, net |  |  |  |
Lease Termination Fee |  |  |  |
Revenue |  | 20,684,000 | $ 21,239,000 |
Lease termination fees |  |  |  |
Lease Termination Fee |  |  |  |
Revenue |  | $ 132,000 |  |

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