XML 127 R96.htm IDEA: XBRL DOCUMENT v3.22.4
Debt - Narrative (Details)
12 Months Ended
May 05, 2021
USD ($)
Dec. 31, 2022
USD ($)
lender
Dec. 31, 2021
USD ($)
Dec. 01, 2019
USD ($)
Contribution Certificates | NORCAL Group        
Debt Instrument [Line Items]        
Principal amount $ 191,000,000      
Debt instruments 175,000,000      
Premium paid on derivative for right to receive cash payments $ 16,000,000      
Debt instrument term 10 years      
Senior Notes | Base Rate | Senior notes due 2023        
Debt Instrument [Line Items]        
Basis spread on variable rate for debt   0.40%    
Line of Credit | Revolving Credit Agreement        
Debt Instrument [Line Items]        
Number of participating lenders | lender   7    
Line of credit facility, maximum borrowing       $ 250,000,000
Additional borrowing capacity   $ 50,000,000    
Line of credit, borrowing capacity including accordion feature   300,000,000    
Long-Term Line of Credit   $ 0 $ 0  
Maximum allowable consolidated funded indebtedness ratio (percent)   0.35    
Minimum net worth required   $ 1,000,000,000    
Line of Credit | Revolving Credit Agreement | Minimum        
Debt Instrument [Line Items]        
Basis spread on variable rate for debt   0.00%    
Commitment fee percentages (percent)   0.15%    
Line of Credit | Revolving Credit Agreement | Maximum        
Debt Instrument [Line Items]        
Basis spread on variable rate for debt   1.88%    
Commitment fee percentages (percent)   0.30%    
Line of Credit | Federal Funds Rate | Revolving Credit Agreement        
Debt Instrument [Line Items]        
Basis spread on variable rate for debt   0.50%    
Line of Credit | One month LIBOR | Revolving Credit Agreement        
Debt Instrument [Line Items]        
Basis spread on variable rate for debt   1.00%