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v3.20.1

LEASES - As Lessor - Lease Termination Fees (Details) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) item | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Lease Termination Fee |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 22,448,000 | $ 20,414,000 | $ 20,719,000 | $ 21,155,000 | $ 20,270,000 | $ 19,570,000 | $ 19,752,000 | $ 19,534,000 | $ 84,736,000 | $ 79,126,000 | $ 75,916,000
Tenants in lease buy-out transactions |  |  |  |  |  |  |  |  |  |  |
Lease Termination Fee |  |  |  |  |  |  |  |  |  |  |
Number of retail tenants in lease buy-out transactions | item |  |  |  |  |  |  |  |  | 2 |  |
Write-off of the unamortized intangible lease liability |  |  |  |  | $ 878,000 |  |  |  |  | 878,000 |
Write-off of unbilled rent receivable |  |  |  |  |  |  |  |  | $ 37,000 | 74,000 |
Rental income, net |  |  |  |  |  |  |  |  |  |  |
Lease Termination Fee |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 83,786,000 | 78,754,000 | $ 75,916,000
Rental income, net | Tenants in lease buy-out transactions |  |  |  |  |  |  |  |  |  |  |
Lease Termination Fee |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  | 804,000 |
Lease termination fees |  |  |  |  |  |  |  |  |  |  |
Lease Termination Fee |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 950,000 | 372,000 |
Lease termination fees | Tenants in lease buy-out transactions |  |  |  |  |  |  |  |  |  |  |
Lease Termination Fee |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 950,000 | $ 372,000 |

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