General form of registration statement for all companies including face-amount certificate companies

Long-Term Debt - Additional Information (Detail)

v3.21.2
Long-Term Debt - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 12, 2019
Dec. 21, 2018
Jan. 31, 2021
Dec. 31, 2020
Sep. 30, 2021
Dec. 31, 2019
Debt Issuance Costs, Net       $ 7,403 $ 224 $ 9,233
Restricted Cash       $ 299,000    
Term Loan UBS [Member]            
Debt Instrument, Face Amount   $ 280,000        
Debt Instrument, Maturity Date   Dec. 21, 2024        
Debt Instrument, Interest Rate, Stated Percentage   5.50%        
Debt Instrument, Repurchase Amount $ 35,000          
Debt Instrument, Periodic Payment 800          
Repayments of Debt 8,300          
Debt Issuance Costs, Net 1,500          
Debt Instrument, Interest Rate, Stated Percentage   5.50%        
Debt Instrument Periodic Payment $ 800          
Term Loan UBS [Member] | Revolving Credit Facility [Member]            
Line of Credit Facility, Maximum Borrowing Capacity   $ 30,000        
Line of Credit Facility, Expiration Date   Dec. 21, 2023        
Line of Credit Facility, Interest Rate at Period End   4.50%        
Line of Credit Facility, Commitment Fee Percentage   0.50%        
Long-term Line of Credit   $ 0        
Term Loan BNP Paribas [Member]            
Debt Instrument, Maturity Date     Jan. 02, 2021 Jan. 02, 2021    
Debt Instrument, Interest Rate, Stated Percentage     2.15% 2.15%    
Debt Instrument, Periodic Payment     $ 7,740 $ 7,740    
Debt Instrument, Interest Rate, Stated Percentage     2.15% 2.15%    
Debt Instrument Periodic Payment     $ 7,740 $ 7,740