Losses and LAE - Schedule of Provision for Losses (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Effects of Reinsurance [Line Items]
Total provision for losses	$ 15,167	$ (7,034)
Mortgage insurance \| Operating Segments [Member]
Effects of Reinsurance [Line Items]
Total provision for losses	15,340	(6,886)
Title insurance \| Intersegment Eliminations [Member]
Effects of Reinsurance [Line Items]
Total provision for losses	$ (173)	$ (148)

Amount, after effects of policies assumed or ceded, of expense related to the provision for policy benefits and costs incurred.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(5))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1

Name:	us-gaap_PolicyholderBenefitsAndClaimsIncurredNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration