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v3.23.1

Investments (Fair Value and Gross Pre-Tax Net Unrealized Loss of Securities By Length of Time) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
U.S. Government and Government Agencies [Member] |  |
AFS Fair Value, Less than 12 Months | $ 30,947 | $ 166,975
AFS Unrealized Losses, Less than 12 months | (1,069) | (13,658)
AFS Fair Value, 12 months or longer | 82,522 | 16,011
AFS Unrealized Losses, 12 months or longer | (17,084) | (6,668)
AFS Fair Value | 113,469 | 182,986
AFS Unrealized Losses | (18,153) | (20,326)
Foreign Government [Member] |  |
AFS Fair Value, Less than 12 Months | 5,135 | 5,573
AFS Unrealized Losses, Less than 12 months | (354) | (608)
AFS Fair Value, 12 months or longer | 4,752 | 2,456
AFS Unrealized Losses, 12 months or longer | (908) | (699)
AFS Fair Value | 9,887 | 8,029
AFS Unrealized Losses | (1,262) | (1,307)
Obligations of States and Political Subdivisions [Member] |  |
AFS Fair Value, Less than 12 Months | 256,332 | 681,795
AFS Unrealized Losses, Less than 12 months | (7,836) | (43,767)
AFS Fair Value, 12 months or longer | 179,924 | 16,618
AFS Unrealized Losses, 12 months or longer | (25,907) | (4,234)
AFS Fair Value | 436,256 | 698,413
AFS Unrealized Losses | (33,743) | (48,001)
Corporate Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 1,251,275 | 1,889,492
AFS Unrealized Losses, Less than 12 months | (60,040) | (164,197)
AFS Fair Value, 12 months or longer | 664,923 | 133,223
AFS Unrealized Losses, 12 months or longer | (115,002) | (32,612)
AFS Fair Value | 1,916,198 | 2,022,715
AFS Unrealized Losses | (175,042) | (196,809)
Collateralized Loan Obligations and Other Asset Backed Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 492,148 | 916,423
AFS Unrealized Losses, Less than 12 months | (22,463) | (69,155)
AFS Fair Value, 12 months or longer | 780,530 | 411,283
AFS Unrealized Losses, 12 months or longer | (79,577) | (52,565)
AFS Fair Value | 1,272,678 | 1,327,706
AFS Unrealized Losses | (102,040) | (121,720)
Residential Mortgage Backed Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 598,559 | 887,229
AFS Unrealized Losses, Less than 12 months | (25,403) | (76,432)
AFS Fair Value, 12 months or longer | 445,561 | 108,041
AFS Unrealized Losses, 12 months or longer | (59,985) | (22,833)
AFS Fair Value | 1,044,120 | 995,270
AFS Unrealized Losses | (85,388) | (99,265)
Commercial Mortgage Backed Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 354,433 | 512,953
AFS Unrealized Losses, Less than 12 months | (16,702) | (37,815)
AFS Fair Value, 12 months or longer | 253,708 | 77,181
AFS Unrealized Losses, 12 months or longer | (31,109) | (11,945)
AFS Fair Value | 608,141 | 590,134
AFS Unrealized Losses | (47,811) | (49,760)
Available-for-sale Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 2,988,829 | 5,060,440
AFS Unrealized Losses, Less than 12 months | (133,867) | (405,632)
AFS Fair Value, 12 months or longer | 2,411,920 | 764,813
AFS Unrealized Losses, 12 months or longer | (329,572) | (131,556)
AFS Fair Value | 5,400,749 | 5,825,253
AFS Unrealized Losses | $ (463,439) | $ (537,188)

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