REAL ESTATE AND OTHER SECURITIES - Summary of Activity Related to Credit Losses on Debt Securities Excluding Credit Impairment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on available-for-sale debt securities at beginning balance	$ 3,471	$ 8,672
Additions to the allowance for credit losses on securities for which credit losses were not previously recorded	6,804	0
Additions to the allowance for credit losses arising from purchases of available-for-sale debt securities accounted for as purchased financial assets with credit deterioration	0	0
Reductions for securities sold during the period	0	(2,182)
Reductions in the allowance for credit losses because the entity intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis	0	0
Additional increases (decreases) to the allowance for credit losses on securities that had credit losses or an allowance recorded in a previous period	541	(3,019)
Write-offs charged against the allowance	0	0
Recoveries of amounts previously written off	0	0
Allowance for credit losses on available-for-sale debt securities at ending balance	10,816	3,471
Purchased Credit Deteriorated
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on available-for-sale debt securities at beginning balance	3,471	8,672
Additions to the allowance for credit losses on securities for which credit losses were not previously recorded	128	0
Additions to the allowance for credit losses arising from purchases of available-for-sale debt securities accounted for as purchased financial assets with credit deterioration	0	0
Reductions for securities sold during the period	0	(2,182)
Reductions in the allowance for credit losses because the entity intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis	0	0
Additional increases (decreases) to the allowance for credit losses on securities that had credit losses or an allowance recorded in a previous period	541	(3,019)
Write-offs charged against the allowance	0	0
Recoveries of amounts previously written off	0	0
Allowance for credit losses on available-for-sale debt securities at ending balance	4,140	3,471
Non-Purchased Credit Deteriorated
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses on available-for-sale debt securities at beginning balance	0	0
Additions to the allowance for credit losses on securities for which credit losses were not previously recorded	6,676	0
Additions to the allowance for credit losses arising from purchases of available-for-sale debt securities accounted for as purchased financial assets with credit deterioration	0	0
Reductions for securities sold during the period	0	0
Reductions in the allowance for credit losses because the entity intends to sell the security or more likely than not will be required to sell the security before recovery of its amortized cost basis	0	0
Additional increases (decreases) to the allowance for credit losses on securities that had credit losses or an allowance recorded in a previous period	0	0
Write-offs charged against the allowance	0	0
Recoveries of amounts previously written off	0	0
Allowance for credit losses on available-for-sale debt securities at ending balance	$ 6,676	$ 0