v3.21.2
Fair Value of Financial Instruments - Narrative (Details)
$ in Thousands
Jun. 30, 2021
USD ($)
security
Dec. 31, 2020
USD ($)
security
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, number of securities priced for fair value | security 1 2
Fixed maturities | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, securities valued using market approach $ 6,545 $ 10,809
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial instruments, fair value 995,342 1,243,850
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial instruments, fair value 860,231 1,118,909
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Financial instruments, fair value $ 29,344 $ 26,094
Estimate of Fair Value Measurement | Fair Value, Measurements, Recurring | Fixed maturities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, valued by third party, percentage 99.30% 99.10%
Assets, valued using market approach, percentage 0.70% 0.90%