Financial Guarantee Liability - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($)
Guarantor Obligations
Outstanding loan balances		$ 27,600,000	$ 25,800,000
Maximum loss potential		8,400,000	7,800,000
Provision (reversal) for expected credit losses	$ (3,592)	1,740	(3,600)	$ 11,600
Foreclosure
Guarantor Obligations
Outstanding loan balances		22,800
Maximum loss potential		$ 7,600
Number of loans | loan		1
Liquidation value of loans outstanding		$ 20,000
Potential loss on liquidation of loan		1,500
Delinquent
Guarantor Obligations
Outstanding loan balances		7,300	33,600
Maximum loss potential		$ 2,400	$ 11,200
Number of loans | loan		1	2
Liquidation value of loans outstanding		$ 4,200	$ 28,400
Potential loss on liquidation of loan		$ 1,100	$ 2,300
Fannie Mae DUS or Freddie TAH Loans | Maximum
Guarantor Obligations
Percentage of contingent liability of actual losses incurred on outstanding loans		33.00%