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Schedule of Participating Mortgage Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Net Investment Income [Line Items]
Total	$ 713,967	$ 668,032
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]
Net Investment Income [Line Items]
Total	694,967	639,875
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]
Net Investment Income [Line Items]
Total	$ 19,000	$ 28,157

X

- Definition

Amount of contractual principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column F
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column F))
-URI http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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