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v3.23.3

Investments (Fair Value and Gross Pre-Tax Net Unrealized Loss of Securities By Length of Time) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
U.S. Government and Government Agencies [Member] |  |
AFS Fair Value, Less than 12 Months | $ 126,898 | $ 166,975
AFS Unrealized Losses, Less than 12 months | (1,428) | (13,658)
AFS Fair Value, 12 months or longer | 99,831 | 16,011
AFS Unrealized Losses, 12 months or longer | (25,017) | (6,668)
AFS Fair Value | 226,729 | 182,986
AFS Unrealized Losses | (26,445) | (20,326)
Foreign Government [Member] |  |
AFS Fair Value, Less than 12 Months | 1,528 | 5,573
AFS Unrealized Losses, Less than 12 months | (122) | (608)
AFS Fair Value, 12 months or longer | 7,788 | 2,456
AFS Unrealized Losses, 12 months or longer | (1,685) | (699)
AFS Fair Value | 9,316 | 8,029
AFS Unrealized Losses | (1,807) | (1,307)
Obligations of States and Political Subdivisions [Member] |  |
AFS Fair Value, Less than 12 Months | 307,144 | 681,795
AFS Unrealized Losses, Less than 12 months | (8,921) | (43,767)
AFS Fair Value, 12 months or longer | 282,238 | 16,618
AFS Unrealized Losses, 12 months or longer | (47,636) | (4,234)
AFS Fair Value | 589,382 | 698,413
AFS Unrealized Losses | (56,557) | (48,001)
Corporate Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 808,733 | 1,889,492
AFS Unrealized Losses, Less than 12 months | (27,732) | (164,197)
AFS Fair Value, 12 months or longer | 1,392,386 | 133,223
AFS Unrealized Losses, 12 months or longer | (200,824) | (32,612)
AFS Fair Value | 2,201,119 | 2,022,715
AFS Unrealized Losses | (228,556) | (196,809)
Collateralized Loan Obligations and Other Asset Backed Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 522,941 | 916,423
AFS Unrealized Losses, Less than 12 months | (13,560) | (69,155)
AFS Fair Value, 12 months or longer | 1,014,419 | 411,283
AFS Unrealized Losses, 12 months or longer | (93,105) | (52,565)
AFS Fair Value | 1,537,360 | 1,327,706
AFS Unrealized Losses | (106,665) | (121,720)
Residential Mortgage Backed Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 609,952 | 887,229
AFS Unrealized Losses, Less than 12 months | (28,785) | (76,432)
AFS Fair Value, 12 months or longer | 725,818 | 108,041
AFS Unrealized Losses, 12 months or longer | (124,389) | (22,833)
AFS Fair Value | 1,335,770 | 995,270
AFS Unrealized Losses | (153,174) | (99,265)
Commercial Mortgage Backed Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 182,481 | 512,953
AFS Unrealized Losses, Less than 12 months | (8,363) | (37,815)
AFS Fair Value, 12 months or longer | 455,518 | 77,181
AFS Unrealized Losses, 12 months or longer | (53,913) | (11,945)
AFS Fair Value | 637,999 | 590,134
AFS Unrealized Losses | (62,276) | (49,760)
Available-for-sale Securities [Member] |  |
AFS Fair Value, Less than 12 Months | 2,559,677 | 5,060,440
AFS Unrealized Losses, Less than 12 months | (88,911) | (405,632)
AFS Fair Value, 12 months or longer | 3,977,998 | 764,813
AFS Unrealized Losses, 12 months or longer | (546,569) | (131,556)
AFS Fair Value | 6,537,675 | 5,825,253
AFS Unrealized Losses | $ (635,480) | $ (537,188)

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