XML 89 R59.htm IDEA: XBRL DOCUMENT v3.22.0.1
Investments (Available-For-Sale Securities Disclosure) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance $ (3,969) $ 0
Accrued investment income 48,247 45,004
Current provision for securities without prior allowance 8,135 5,042
Increase or (Decrease) on securities with prior allowance, excluding intent (or Requirements) to sell securities (1,284) 0
Reduction for securities sold (926) (974)
Reduction for securities identified as intent (or requirement) to sell during the period (170) (99)
Debt Securities, Available-for-sale, Fair Value 6,709,976 6,455,928
Allowance for credit losses, ending balance at December 31, 2020 (9,724) (3,969)
Fixed income securities, Available-For-Sale, Amortized Cost 6,490,753 6,073,517
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 246,301 397,922
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 17,354 11,542
Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Accrued investment income 46,300 43,800
U.S. Government and Government Agencies [Member] | Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance 0  
Debt Securities, Available-for-sale, Fair Value 130,458 116,140
Allowance for credit losses, ending balance at December 31, 2020 0 0
Fixed income securities, Available-For-Sale, Amortized Cost 127,974 110,038
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 3,629 6,239
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 1,145 137
Foreign Government [Member] | Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance (1) 0
Current provision for securities without prior allowance 46 19
Increase or (Decrease) on securities with prior allowance, excluding intent (or Requirements) to sell securities (1) 0
Reduction for securities sold 0 (18)
Reduction for securities identified as intent (or requirement) to sell during the period 0 0
Debt Securities, Available-for-sale, Fair Value 15,860 18,366
Allowance for credit losses, ending balance at December 31, 2020 (46) (1)
Fixed income securities, Available-For-Sale, Amortized Cost 15,420 16,801
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 609 1,569
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 123 3
Obligations of States and Political Subdivisions [Member] | Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance (4) 0
Current provision for securities without prior allowance 122 4
Increase or (Decrease) on securities with prior allowance, excluding intent (or Requirements) to sell securities 11 0
Reduction for securities sold 0 0
Reduction for securities identified as intent (or requirement) to sell during the period 0 0
Debt Securities, Available-for-sale, Fair Value 1,189,308 1,247,137
Allowance for credit losses, ending balance at December 31, 2020 (137) (4)
Fixed income securities, Available-For-Sale, Amortized Cost 1,121,422 1,159,588
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 68,258 87,564
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 235 11
Corporate Securities [Member] | Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance (2,782) 0
Current provision for securities without prior allowance 5,785 3,645
Increase or (Decrease) on securities with prior allowance, excluding intent (or Requirements) to sell securities (992) 0
Reduction for securities sold (723) (781)
Reduction for securities identified as intent (or requirement) to sell during the period (170) (82)
Debt Securities, Available-for-sale, Fair Value 2,573,603 2,328,052
Allowance for credit losses, ending balance at December 31, 2020 (6,682) (2,782)
Fixed income securities, Available-For-Sale, Amortized Cost 2,478,348 2,152,203
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 106,890 180,971
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 4,953 2,340
Collateralized Loan Obligations and Other Asset-Backed Securities [Member] | Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance (592) 0
Current provision for securities without prior allowance 579 722
Increase or (Decrease) on securities with prior allowance, excluding intent (or Requirements) to sell securities (211) 0
Reduction for securities sold (21) (113)
Reduction for securities identified as intent (or requirement) to sell during the period 0 (17)
Debt Securities, Available-for-sale, Fair Value 1,350,814 1,026,551
Allowance for credit losses, ending balance at December 31, 2020 (939) (592)
Fixed income securities, Available-For-Sale, Amortized Cost 1,343,687 1,014,820
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 14,350 20,166
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 6,284 7,843
Residential Mortgage Backed Securities [Member] | Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance (561) 0
Current provision for securities without prior allowance 1,593 623
Increase or (Decrease) on securities with prior allowance, excluding intent (or Requirements) to sell securities (63) 0
Reduction for securities sold (182) (62)
Reduction for securities identified as intent (or requirement) to sell during the period 0 0
Debt Securities, Available-for-sale, Fair Value 776,252 1,051,788
Allowance for credit losses, ending balance at December 31, 2020 (1,909) (561)
Fixed income securities, Available-For-Sale, Amortized Cost 756,280 999,485
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 24,813 53,065
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 2,932 201
Commercial Mortgage Backed Securities [Member] | Available-for-sale Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Allowance for credit losses, Period beginning balance (29) 0
Current provision for securities without prior allowance 10 29
Increase or (Decrease) on securities with prior allowance, excluding intent (or Requirements) to sell securities (28) 0
Reduction for securities sold 0 0
Reduction for securities identified as intent (or requirement) to sell during the period 0 0
Debt Securities, Available-for-sale, Fair Value 673,681 667,894
Allowance for credit losses, ending balance at December 31, 2020 (11) (29)
Fixed income securities, Available-For-Sale, Amortized Cost 647,622 620,582
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 27,752 48,348
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax $ 1,682 $ 1,007