XML 52 R40.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Investments - AFS Allowance for Credit Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Expected credit loss on available-for-sale debt securities at beginning of period $ 566 $ 920
Provision for (or reversal of) credit loss expense 34 (354)
Expected credit loss on available-for-sale debt securities at end of period 600 566
Corporate Bonds    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Expected credit loss on available-for-sale debt securities at beginning of period 469 729
Provision for (or reversal of) credit loss expense 33 (260)
Expected credit loss on available-for-sale debt securities at end of period 502 469
Municipal Bonds    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Expected credit loss on available-for-sale debt securities at beginning of period 4 2
Provision for (or reversal of) credit loss expense 1 2
Expected credit loss on available-for-sale debt securities at end of period 5 4
Redeemable Preferred Stock    
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]    
Expected credit loss on available-for-sale debt securities at beginning of period 93 189
Provision for (or reversal of) credit loss expense 0 (96)
Expected credit loss on available-for-sale debt securities at end of period $ 93 $ 93