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Commitments and Contingencies - Repurchase Reserve Activity (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Commitment And Contingencies [Line Items]
Beginning balance	$ 97,947	$ 89,553	$ 89,553
Provision charged to (released from) operating expense, net		900
Charge-offs	(278)	(325)	(1,575)
Ending balance	97,607	90,343	97,947
Mortgage Loans [Member]
Commitment And Contingencies [Line Items]
Beginning balance	1,198	1,725	1,725
Provision charged to (released from) operating expense, net		(34)
Charge-offs	(26)	(46)
Ending balance	$ 1,172	$ 1,645	$ 1,198

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- Definition

Commitment And Contingencies [Line Items]

+ References

No definition available.

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- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 45
-Paragraph 28
-Subparagraph (a)
-SubTopic 10
-Topic 230
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Subparagraph (c)(2)
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-Topic 310
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