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FAIR VALUE OF DERIVATIVES AND FINANCIAL INSTRUMENTS (UNITED DOMINION REALTY, L.P.) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Debt instruments - fair value |  |
Transfer between the levels | $ 0 |
Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Total liabilities | 4,731,595 | $ 3,566,018
Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 4,853,337 | 3,532,104
Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value |  | 94,700
Credit facilities | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 213,661 |
Level 2 | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 142 | 356
Level 3 | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 4,853,195 | 3,531,748
Level 3 | Credit facilities | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 213,661 |
United Dominion Realty L.P. | Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Total liabilities | 99,500 | 27,000
United Dominion Realty L.P. | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities | 98,976 | 27,000
United Dominion Realty L.P. | Level 3 | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Total liabilities | 98,976 |
United Dominion Realty L.P. | Level 3 | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Total liabilities |  | 27,000
Fixed Rate Debt | Mortgages Notes Payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 898,329 | 416,314
Fixed Rate Debt | Level 3 | Mortgages Notes Payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 898,329 | 416,314
Fixed Rate Debt | United Dominion Realty L.P. | Mortgages Notes Payable | Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Fair value | 72,500 |
Fixed Rate Debt | United Dominion Realty L.P. | Mortgages Notes Payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 71,976 |
Fixed Rate Debt | United Dominion Realty L.P. | Level 3 | Mortgages Notes Payable | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | 71,976 |
Variable Rate Debt | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 27,000 |
Variable Rate Debt | Level 3 | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 27,000 | 94,700
Variable Rate Debt | United Dominion Realty L.P. | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Carrying Amount |  |
Debt instruments - fair value |  |
Fair value | 27,000 | 27,000
Variable Rate Debt | United Dominion Realty L.P. | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring | Fair Value |  |
Debt instruments - fair value |  |
Fair value | 27,000 | 27,000
Variable Rate Debt | United Dominion Realty L.P. | Level 3 | Tax-exempt secured notes payable | Fair Value, Measurements, Recurring |  |
Debt instruments - fair value |  |
Fair value | $ 27,000 | $ 27,000

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