v3.26.1
Fair Value of Financial Instruments (Schedule of Comparison of the Carrying Value and Estimated Fair Value of Financial Instruments) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Assets    
Cash and cash equivalents [1] $ 25.7 $ 22.8
Restricted cash and cash equivalents [1] 525.7 477.9
Debt Securities, Available-for-sale, Restricted 109.4 106.2
Loans receivable, net [1] 9,002.7 8,974.1
Liabilities    
Revolving secured lines of credit [1] 219.6 107.3
Secured financing [1] 5,134.3 5,225.3
Senior notes [1] 1,105.3 1,131.4
Carrying Amount [Member]    
Assets    
Cash and cash equivalents 25.7 22.8
Restricted cash and cash equivalents 525.7 477.9
Debt Securities, Available-for-sale, Restricted 109.4 106.2
Loans receivable, net 7,956.4 7,909.2
Liabilities    
Revolving secured lines of credit 219.6 107.3
Secured financing 5,100.3 5,158.8
Senior notes 1,088.7 1,087.8
Estimated Fair Value [Member]    
Assets    
Cash and cash equivalents 25.7 22.8
Restricted cash and cash equivalents 525.7 477.9
Debt Securities, Available-for-sale, Restricted 109.4 106.2
Loans receivable, net 9,002.7 8,974.1
Liabilities    
Revolving secured lines of credit 219.6 107.3
Secured financing 5,134.3 5,225.3
Senior notes $ 1,105.3 $ 1,131.4
[1] Measured at amortized cost with fair value disclosed.