Significant Accounting Policies - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($) Category Payment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Significant Accounting Policies Line Items [Line Items]
Maximum maturity duration for short term investment grouping		12 months
Accounts and notes receivable	$ 123,857	$ 128,093	$ 123,857
Number of payments missed for insured loans | Payment		2
Goodwill	0	$ 0	0
Impairment of goodwill	10,000	0	9,802	$ 0
Acquired intangible asset balance	0	0	0
Depreciation and amortization expense		$ 18,000	15,000	$ 15,000
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]		true
Change in Accounting Principle, Accounting Standards Update, Adoption Date		Dec. 31, 2024
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]		true
Accounting Standards Update [Extensible Enumeration]		us-gaap:AccountingStandardsUpdate202307Member
Minimum
Significant Accounting Policies Line Items [Line Items]
Number of payments missed for insured loans | Payment		2
Useful life		3 years
Maximum
Significant Accounting Policies Line Items [Line Items]
Useful life		7 years
Mortgage insurance
Significant Accounting Policies Line Items [Line Items]
Number of mortgage insurance product categories | Category		2
Premium receivable for deferred monthly premiums	36,000	$ 38,000	36,000
Contractual deferred monthly premiums	81,000	83,000	81,000
homegenius
Significant Accounting Policies Line Items [Line Items]
Accounts and notes receivable	$ 5,000	$ 5,000	$ 5,000