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Agreements and Transactions with Related Parties - 2015 Activity (Details) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Jul. 31, 2025	Apr. 30, 2025	Dec. 31, 2015
Residential Mortgage Banking Business
Agreements and Transactions with Related Parties
Agreement to sell business, expected sale price		$ 22.0
Distribution received	$ 16.4	5.6
Wakefield Investment Holding LLC | Residential Mortgage Banking Business
Agreements and Transactions with Related Parties
Agreement to sell business, expected sale price		117.3
Sale agreement, installment one		15.0
Sale agreement, installment two		15.0
Sale agreement, installment three		$ 87.3
Residential mortgage banking business | Other Related Party Transactions | Related Party | ACM
Agreements and Transactions with Related Parties
Noncontrolling interest in equity method investment acquired (as a percent)			50.00%
ACM | Residential mortgage banking business | Other Related Party Transactions | Related Party
Agreements and Transactions with Related Parties
Acquisition purchase price			$ 9.6

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