Financial Guarantee Liability - Narrative (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025 USD ($) loan	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($)
Guarantor Obligations
Outstanding loan balances	$ 32,700,000		$ 32,100,000
Maximum loss potential	10,200,000		10,000,000
Provision (reversal) for expected credit losses	$ 1,503	$ 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
Maximum loss potential	$ 1,700		1,700
Number of loans | loan	1
Advances for principal and interest	$ 1,500		2,100
Liquidation value of loans outstanding	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%