Annual report pursuant to Section 13 and 15(d)

Borrowings - Terms of MetLife Facility (Detail)

v3.24.0.1
Borrowings - Terms of MetLife Facility (Detail) - USD ($)
12 Months Ended
Dec. 31, 2023
Feb. 03, 2022
MetLife    
Debt Instrument [Line Items]    
Aggregate Commitment $ 250,000,000  
Principal Outstanding 37,100,000  
Undrawn Commitment 212,900,000  
MetLife Credit Facility | Line of credit    
Debt Instrument [Line Items]    
Aggregate Commitment 75,000,000  
Principal Outstanding 200,000  
Undrawn Commitment 74,800,000  
Long-term debt, additional amount available $ 110,200,000  
Minimum annualized rate 2.50%  
MetLife Credit Facility | Line of credit | Secured Overnight Financing Rate    
Debt Instrument [Line Items]    
Variable rate 2.00%  
MetLife Credit Facility | Line of credit | Minimum    
Debt Instrument [Line Items]    
Unused fee 0.10%  
MetLife Credit Facility | Line of credit | Maximum    
Debt Instrument [Line Items]    
Unused fee 0.20%  
MetLife Credit Facility | Notes payable to bank    
Debt Instrument [Line Items]    
Aggregate Commitment   $ 100,000,000
MetLife Credit Facility | Notes payable to bank | Minimum    
Debt Instrument [Line Items]    
Unused fee 0.10%  
MetLife Credit Facility | Notes payable to bank | Maximum    
Debt Instrument [Line Items]    
Unused fee 0.20%  
2020 MetLife Term Note | Line of credit    
Debt Instrument [Line Items]    
Aggregate Commitment $ 75,000,000  
2020 MetLife Term Note | Notes payable to bank    
Debt Instrument [Line Items]    
Aggregate Commitment   $ 75,000,000
Principal Outstanding $ 36,900,000  
Stated interest rate 2.75%  
Undrawn Commitment $ 38,100,000  
2022 MetLife Term Note | Line of credit    
Debt Instrument [Line Items]    
Aggregate Commitment 100,000,000  
Principal Outstanding 0  
Undrawn Commitment $ 100,000,000