Mortgage Loans at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Receivables [Abstract]
Mortgage loans, unpaid principal balance	$ 7,244,605	$ 5,380,119
Premiums paid on mortgage loans	65,761	55,112
Fair value adjustment	27,769	14,653
Mortgage loans at fair value	$ 7,338,135	$ 5,449,884

Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
-SubTopic 310
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481852/948-310-45-1

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant