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Financial Guarantee Liability - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) loan	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($)
Guarantor Obligations
Outstanding loan balances	$ 35,000,000		$ 35,000,000		$ 32,100,000
Maximum loss potential	11,000,000		11,000,000		10,000,000
Provision (reversal) for expected credit losses	1,700	$ (2,700)	$ 5,172	$ (1,300)	(1,891)
Delinquency threshold period			60 days
Financial guarantee liability, settlement loss						$ 300
Delinquent
Guarantor Obligations
Outstanding loan balances	5,100		$ 5,100		5,100
Maximum loss potential	$ 1,700		$ 1,700		1,700
Number of loans | loan	1		1
Advances for principal and interest	$ 1,500		$ 1,500		2,100
Liquidation value of loans outstanding	$ 3,500		3,500		6,100
Potential loss on liquidation of loan			$ 1,000		$ 200
Foreclosure
Guarantor Obligations
Number of loans | loan					1
Fannie Mae DUS or Freddie TAH Loans | Maximum
Guarantor Obligations
Percentage of contingent liability of actual losses incurred on outstanding loans			33.00%

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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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