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v3.24.3

Investment Securities - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | $ 2,769,067 | $ 2,694,012
Available-for-Sale: Gross Unrealized Gains | 943 | 704
Available-for-Sale: Gross Unrealized Losses | (219,686) | (285,783)
Available-for-Sale: Fair Value | 2,550,324 | 2,408,933
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 4,710,245 | 4,997,335
Held-to-Maturity: Gross Unrealized Gains | 346 | 29
Held-to-Maturity: Gross Unrealized Losses | (637,995) | (743,727)
Held-to-Maturity: Fair Value | 4,072,596 | 4,253,637
Debt Securities Issued by the U.S. Treasury and Government Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 235,927 | 223,308
Available-for-Sale: Gross Unrealized Gains | 324 | 361
Available-for-Sale: Gross Unrealized Losses | (7,222) | (11,096)
Available-for-Sale: Fair Value | 229,029 | 212,573
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 131,836 | 131,742
Held-to-Maturity: Gross Unrealized Losses | (11,986) | (15,211)
Held-to-Maturity: Fair Value | 119,850 | 116,531
Debt Securities Issued by States and Political Subdivisions |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 73,142 | 73,417
Available-for-Sale: Gross Unrealized Losses | (7,297) | (9,611)
Available-for-Sale: Fair Value | 65,845 | 63,806
Debt Securities Issued by Government-Sponsored Enterprises |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 1,506 | 1,556
Available-for-Sale: Gross Unrealized Losses | (42) | (80)
Available-for-Sale: Fair Value | 1,464 | 1,476
Debt Securities Issued by Corporations |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 703,910 | 706,002
Available-for-Sale: Gross Unrealized Gains | 104 | 142
Available-for-Sale: Gross Unrealized Losses | (30,623) | (48,443)
Available-for-Sale: Fair Value | 673,391 | 657,701
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 10,556 | 11,483
Held-to-Maturity: Gross Unrealized Losses | (1,759) | (1,998)
Held-to-Maturity: Fair Value | 8,797 | 9,485
Residential - Government Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 716,933 | 713,918
Available-for-Sale: Gross Unrealized Gains | 309 | 194
Available-for-Sale: Gross Unrealized Losses | (68,653) | (84,785)
Available-for-Sale: Fair Value | 648,589 | 629,327
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 1,553,811 | 1,674,076
Held-to-Maturity: Gross Unrealized Gains | 73 | 20
Held-to-Maturity: Gross Unrealized Losses | (227,281) | (265,493)
Held-to-Maturity: Fair Value | 1,326,603 | 1,408,603
Residential - U.S. Government-Sponsored Enterprises |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 773,520 | 818,296
Available-for-Sale: Gross Unrealized Gains | 99 | 7
Available-for-Sale: Gross Unrealized Losses | (85,799) | (109,176)
Available-for-Sale: Fair Value | 687,820 | 709,127
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 2,585,212 | 2,744,094
Held-to-Maturity: Gross Unrealized Gains | 273 | 9
Held-to-Maturity: Gross Unrealized Losses | (316,257) | (369,965)
Held-to-Maturity: Fair Value | 2,269,228 | 2,374,138
Commercial - Government Agencies or Sponsored Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 264,129 | 157,515
Available-for-Sale: Gross Unrealized Gains | 107 |
Available-for-Sale: Gross Unrealized Losses | (20,050) | (22,592)
Available-for-Sale: Fair Value | 244,186 | 134,923
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 428,830 | 435,940
Held-to-Maturity: Gross Unrealized Losses | (80,712) | (91,060)
Held-to-Maturity: Fair Value | 348,118 | 344,880
Mortgage-Backed Securities |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 1,754,582 | 1,689,729
Available-for-Sale: Gross Unrealized Gains | 515 | 201
Available-for-Sale: Gross Unrealized Losses | (174,502) | (216,553)
Available-for-Sale: Fair Value | 1,580,595 | 1,473,377
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 4,567,853 | 4,854,110
Held-to-Maturity: Gross Unrealized Gains | 346 | 29
Held-to-Maturity: Gross Unrealized Losses | (624,250) | (726,518)
Held-to-Maturity: Fair Value | $ 3,943,949 | $ 4,127,621

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