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NONCONTROLLING INTERESTS - Interests in Consolidated Real Estate Joint Ventures (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) facility | Dec. 31, 2021 USD ($)
Variable Interest Entity [Line Items] |  |
Total assets | $ 6,325,830 | $ 6,548,079
Total liabilities | 3,428,030 | $ 3,549,699
VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 167,478 |
Total liabilities | 83,111 |
Carrying amount of mortgage loans | 64,445 |
1074 Raritan Road, LLC | VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 3,500 |
Total liabilities | 5 |
Astoria Investors, LLC | VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 24,763 |
Total liabilities | 10,161 |
Carrying amount of mortgage loans | 9,238 |
CS Vienna LLC | VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 32,400 |
Total liabilities | 35,085 |
Carrying amount of mortgage loans | 34,875 |
CS 750 W Merrick Rd LLC | VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 37,140 |
Total liabilities | 17,142 |
CS Valley Forge Village Storage LLC | VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 20,576 |
Total liabilities | 14,863 |
Carrying amount of mortgage loans | 14,792 |
SH3, LLC | VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 38,165 |
Total liabilities | 274 |
C S Lock Up Anoka LLC | VIE |  |
Variable Interest Entity [Line Items] |  |
Total assets | 10,934 |
Total liabilities | 5,581 |
Carrying amount of mortgage loans | $ 5,540 |
VIE | VIE |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 7 |
VIE | 1074 Raritan Road, LLC |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 1 |
Ownership interest held by the entity (as a percent) | 90.00% |
VIE | Astoria Investors, LLC |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 1 |
Ownership interest held by the entity (as a percent) | 70.00% |
VIE | CS Vienna LLC |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 1 |
Ownership interest held by the entity (as a percent) | 80.00% |
VIE | CS 750 W Merrick Rd LLC |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 1 |
Ownership interest held by the entity (as a percent) | 51.00% |
VIE | CS Valley Forge Village Storage LLC |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 1 |
Ownership interest held by the entity (as a percent) | 70.00% |
VIE | SH3, LLC |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 1 |
Ownership interest held by the entity (as a percent) | 90.00% |
VIE | C S Lock Up Anoka LLC |  |
Variable Interest Entity [Line Items] |  |
Number of self-storage facilities owned and operated | facility | 1 |
Ownership interest held by the entity (as a percent) | 50.00% |

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