v3.26.1
Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total investments at fair value $ 2,231.1 $ 2,234.8
Total Investments at fair value, estimated fair value 2,231.1 2,234.8
Cash and cash equivalents 113.3 159.8
Cash and cash equivalents, estimated fair value 113.3 159.8
Restricted cash and cash equivalents 0.2 0.2
Long-Term Line of Credit, Noncurrent 20.0 0.0
Lines of Credit, Fair Value Disclosure 20.0 0.0
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Amount of Advances 105.0 35.0
Federal Home Loan Bank, Advance, Fair Value Disclosure 103.5 35.0
Estimate of Fair Value, Fair Value Disclosure [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Restricted cash and cash equivalents $ 0.2 $ 0.2
Minimum [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Federal Home Loan Bank, Advance, Branch of FHLBank, Interest Rate 3.74%  
Maximum [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Federal Home Loan Bank, Advance, Branch of FHLBank, Interest Rate 3.87%