v3.26.3
Financing and Other Debt - Schedule of Short Term Debt (Details) - USD ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Total short term debt, net $ 1,863,500,000 $ 1,326,400,000
Current portion of long-term debt 54,700,000 54,700,000
Participation debt    
Debt Instrument [Line Items]    
Total short term debt, net $ 70,000,000.0 $ 65,200,000
Interest Rate 6.16% 5.94%
FHLB advances    
Debt Instrument [Line Items]    
Total short term debt, net $ 1,425,000,000 $ 1,105,000,000
Interest Rate 4.03% 3.87%
Borrowed federal funds    
Debt Instrument [Line Items]    
Total short term debt, net $ 195,000,000.0 $ 0
Interest Rate 3.99% 0.00%
Securitized debt (VIEs)    
Debt Instrument [Line Items]    
Total short term debt, net $ 118,800,000 $ 101,400,000
Interest Rate 5.21% 4.68%