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v3.24.2

Accumulated Other Comprehensive Income (Loss) - Change in AOCI Components Net of Tax (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | $ 1,435,977 | $ 1,414,242 | $ 1,354,430 | $ 1,316,995 | $ 1,414,242 | $ 1,316,995
Total Other Comprehensive Income (Loss) | 9,220 | 13,107 | (18,133) | 29,360 | 22,327 | 11,227
Balance at End of Period | 1,612,849 | 1,435,977 | 1,358,279 | 1,354,430 | 1,612,849 | 1,358,279
Unrealized Gains and Losses on Net Investment Securities | Available-for-sale Securities |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | (216,027) | (224,407) | (216,588) | (240,783) | (224,407) | (240,783)
Other Comprehensive Income (Loss) Before Reclassifications | 4,427 |  | (23,215) |  | 12,807 | 980
Total Other Comprehensive Income (Loss) | 4,427 |  | (23,215) |  | 12,807 | 980
Balance at End of Period | (211,600) | (216,027) | (239,803) | (216,588) | (211,600) | (239,803)
Unrealized Gains and Losses on Net Investment Securities | Held-to-maturity Securities |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | (144,463) | (149,021) | (163,716) | (168,797) | (149,021) | (168,797)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | 4,625 |  | 4,998 |  | 9,183 | 10,079
Total Other Comprehensive Income (Loss) | 4,625 |  | 4,998 |  | 9,183 | 10,079
Balance at End of Period | (139,838) | (144,463) | (158,718) | (163,716) | (139,838) | (158,718)
Defined Benefit Plans |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | (23,091) | (23,260) | (24,994) | (25,078) | (23,260) | (25,078)
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | 168 |  | 84 |  | 337 | 168
Total Other Comprehensive Income (Loss) | 168 |  | 84 |  | 337 | 168
Balance at End of Period | (22,923) | (23,091) | (24,910) | (24,994) | (22,923) | (24,910)
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] |  |  |  |  |  |
Balance at Beginning of Period | (383,581) | (396,688) | (405,298) | (434,658) | (396,688) | (434,658)
Other Comprehensive Income (Loss) Before Reclassifications | 4,427 |  | (23,215) |  | 12,807 | 980
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) | 4,793 |  | 5,082 |  | 9,520 | 10,247
Total Other Comprehensive Income (Loss) | 9,220 | 13,107 | (18,133) | 29,360 | 22,327 | 11,227
Balance at End of Period | $ (374,361) | $ (383,581) | $ (423,431) | $ (405,298) | $ (374,361) | $ (423,431)

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