Quarterly report pursuant to Section 13 or 15(d)

INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Summary of Activity Related to Credit Losses on Debt Securities (Details)

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INVESTMENTS IN REAL ESTATE AND OTHER SECURITIES - Summary of Activity Related to Credit Losses on Debt Securities (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]  
Beginning balance of the allowance for credit losses on available-for-sale debt securities $ 0
Additions to the allowance for credit losses on securities for which credit losses were not previously recorded 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
Reductions for securities sold during the period 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
Additional increases (decreases) to the allowance for credit losses on securities that had credit losses or an allowance recorded in a previous period 44,149
Write-offs charged against the allowance 0
Recoveries of amounts previously written off 0
Ending balance of the allowance for credit losses on available-for-sale debt securities 44,149
Purchased Credit Deteriorated  
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]  
Beginning balance of the allowance for credit losses on available-for-sale debt securities 0
Additions to the allowance for credit losses on securities for which credit losses were not previously recorded 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
Reductions for securities sold during the period 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
Additional increases (decreases) to the allowance for credit losses on securities that had credit losses or an allowance recorded in a previous period 24,121
Write-offs charged against the allowance 0
Recoveries of amounts previously written off 0
Ending balance of the allowance for credit losses on available-for-sale debt securities 24,121
Non-Purchased Credit Deteriorated  
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]  
Beginning balance of the allowance for credit losses on available-for-sale debt securities 0
Additions to the allowance for credit losses on securities for which credit losses were not previously recorded 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
Reductions for securities sold during the period 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
Additional increases (decreases) to the allowance for credit losses on securities that had credit losses or an allowance recorded in a previous period 20,028
Write-offs charged against the allowance 0
Recoveries of amounts previously written off 0
Ending balance of the allowance for credit losses on available-for-sale debt securities $ 20,028