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v3.23.2

Investment Securities - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | $ 2,993,004 | $ 3,172,436
Available-for-Sale: Gross Unrealized Gains | 1,340 | 1,851
Available-for-Sale: Gross Unrealized Losses | (327,621) | (329,464)
Available-for-Sale: Fair Value | 2,666,723 | 2,844,823
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 5,202,698 | 5,414,139
Held-to-Maturity: Gross Unrealized Gains | 18 | 43
Held-to-Maturity: Gross Unrealized Losses | (791,713) | (798,789)
Held-to-Maturity: Fair Value | 4,411,003 | 4,615,393
Debt Securities Issued by the U.S. Treasury and Government Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 235,178 | 248,335
Available-for-Sale: Gross Unrealized Gains | 472 | 638
Available-for-Sale: Gross Unrealized Losses | (14,569) | (15,067)
Available-for-Sale: Fair Value | 221,081 | 233,906
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 131,678 | 131,619
Held-to-Maturity: Gross Unrealized Losses | (17,666) | (18,202)
Held-to-Maturity: Fair Value | 114,012 | 113,417
Debt Securities Issued by States and Political Subdivisions |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 107,621 | 107,689
Available-for-Sale: Gross Unrealized Gains | 142 | 158
Available-for-Sale: Gross Unrealized Losses | (11,223) | (12,582)
Available-for-Sale: Fair Value | 96,540 | 95,265
Debt Securities Issued by Government-Sponsored Enterprises |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 1,757 | 48,807
Available-for-Sale: Gross Unrealized Losses | (120) | (179)
Available-for-Sale: Fair Value | 1,637 | 48,628
Debt Securities Issued by Corporations |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 844,587 | 850,585
Available-for-Sale: Gross Unrealized Gains | 552 | 809
Available-for-Sale: Gross Unrealized Losses | (56,385) | (56,736)
Available-for-Sale: Fair Value | 788,754 | 794,658
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 12,094 | 17,014
Held-to-Maturity: Gross Unrealized Losses | (2,174) | (2,534)
Held-to-Maturity: Fair Value | 9,920 | 14,480
Residential - Government Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 771,006 | 828,798
Available-for-Sale: Gross Unrealized Gains | 174 | 245
Available-for-Sale: Gross Unrealized Losses | (95,976) | (96,215)
Available-for-Sale: Fair Value | 675,204 | 732,828
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 1,761,490 | 1,848,239
Held-to-Maturity: Gross Unrealized Gains | 11 | 35
Held-to-Maturity: Gross Unrealized Losses | (290,874) | (294,047)
Held-to-Maturity: Fair Value | 1,470,627 | 1,554,227
Residential - U.S. Government-Sponsored Enterprises |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 869,381 | 919,980
Available-for-Sale: Gross Unrealized Gains |  | 1
Available-for-Sale: Gross Unrealized Losses | (124,667) | (126,110)
Available-for-Sale: Fair Value | 744,714 | 793,871
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 2,856,709 | 2,968,322
Held-to-Maturity: Gross Unrealized Gains | 7 | 8
Held-to-Maturity: Gross Unrealized Losses | (387,659) | (397,055)
Held-to-Maturity: Fair Value | 2,469,057 | 2,571,275
Commercial - Government Agencies or Sponsored Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 163,474 | 168,242
Available-for-Sale: Gross Unrealized Losses | (24,681) | (22,575)
Available-for-Sale: Fair Value | 138,793 | 145,667
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 440,727 | 448,945
Held-to-Maturity: Gross Unrealized Losses | (93,340) | (86,951)
Held-to-Maturity: Fair Value | 347,387 | 361,994
Mortgage-Backed Securities |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 1,803,861 | 1,917,020
Available-for-Sale: Gross Unrealized Gains | 174 | 246
Available-for-Sale: Gross Unrealized Losses | (245,324) | (244,900)
Available-for-Sale: Fair Value | 1,558,711 | 1,672,366
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 5,058,926 | 5,265,506
Held-to-Maturity: Gross Unrealized Gains | 18 | 43
Held-to-Maturity: Gross Unrealized Losses | (771,873) | (778,053)
Held-to-Maturity: Fair Value | $ 4,287,071 | $ 4,487,496

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