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VARIABLE INTEREST ENTITIES - Additional Information (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2022 USD ($) trust	Sep. 30, 2021 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2022 USD ($) trust	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Variable Interest Entity [Line Items]
Total assets	$ 9,368,578			$ 9,368,578		$ 9,393,743
Number of grantor trusts | trust	2			2
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Fundings	$ 0	$ 0		$ 0	$ 0
Maximum loss exposure	22,401			22,401		25,888
Total assets	253,650			253,650		259,746
Investments in grantor trusts	527			527		527
Variable Interest Entity, Not Primary Beneficiary | Other Assets
Variable Interest Entity [Line Items]
Total assets	$ 22,400			$ 22,400		$ 25,900
Variable Interest Entity, Not Primary Beneficiary | Multifamily
Variable Interest Entity [Line Items]
Fundings			$ 573,500
Credit losses guaranteed (percent)	12.00%			12.00%
Maximum loss exposure	$ 68,800			$ 68,800
Repurchase liability recognized	$ 2,000			$ 2,000

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