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v3.22.4

Investment Securities - Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value of Investment Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | $ 3,172,436 | $ 4,320,884
Available-for-Sale: Gross Unrealized Gains | 1,851 | 21,460
Available-for-Sale: Gross Unrealized Losses | (329,464) | (66,288)
Available-for-Sale: Fair Value | 2,844,823 | 4,276,056
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 5,414,139 | 4,694,780
Held-to-Maturity: Gross Unrealized Gains | 43 | 28,334
Held-to-Maturity: Gross Unrealized Losses | (798,789) | (76,495)
Held-to-Maturity: Fair Value | 4,615,393 | 4,646,619
Debt Securities Issued by the U.S. Treasury and Government Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 248,335 | 248,858
Available-for-Sale: Gross Unrealized Gains | 638 | 1,513
Available-for-Sale: Gross Unrealized Losses | (15,067) | (284)
Available-for-Sale: Fair Value | 233,906 | 250,087
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 131,619 | 131,495
Held-to-Maturity: Gross Unrealized Gains |  | 287
Held-to-Maturity: Gross Unrealized Losses | (18,202) | (643)
Held-to-Maturity: Fair Value | 113,417 | 131,139
Debt Securities Issued by States and Political Subdivisions |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 107,689 | 74,743
Available-for-Sale: Gross Unrealized Gains | 158 | 1,080
Available-for-Sale: Gross Unrealized Losses | (12,582) | (5)
Available-for-Sale: Fair Value | 95,265 | 75,818
Debt Securities Issued by Government-Sponsored Enterprises |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 48,807 | 1,758
Available-for-Sale: Gross Unrealized Gains |  | 33
Available-for-Sale: Gross Unrealized Losses | (179) | (11)
Available-for-Sale: Fair Value | 48,628 | 1,780
Debt Securities Issued by Corporations |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 850,585 | 384,590
Available-for-Sale: Gross Unrealized Gains | 809 | 2,339
Available-for-Sale: Gross Unrealized Losses | (56,736) | (3,816)
Available-for-Sale: Fair Value | 794,658 | 383,113
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 17,014 | 20,316
Held-to-Maturity: Gross Unrealized Gains |  | 76
Held-to-Maturity: Gross Unrealized Losses | (2,534) | (249)
Held-to-Maturity: Fair Value | 14,480 | 20,143
Residential - Government Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 828,798 | 1,327,990
Available-for-Sale: Gross Unrealized Gains | 245 | 9,818
Available-for-Sale: Gross Unrealized Losses | (96,215) | (18,766)
Available-for-Sale: Fair Value | 732,828 | 1,319,042
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 1,848,239 | 1,774,394
Held-to-Maturity: Gross Unrealized Gains | 35 | 12,139
Held-to-Maturity: Gross Unrealized Losses | (294,047) | (30,621)
Held-to-Maturity: Fair Value | 1,554,227 | 1,755,912
Residential - U.S. Government-Sponsored Enterprises |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 919,980 | 2,127,781
Available-for-Sale: Gross Unrealized Gains | 1 | 4,792
Available-for-Sale: Gross Unrealized Losses | (126,110) | (42,247)
Available-for-Sale: Fair Value | 793,871 | 2,090,326
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 2,968,322 | 2,286,880
Held-to-Maturity: Gross Unrealized Gains | 8 | 15,508
Held-to-Maturity: Gross Unrealized Losses | (397,055) | (32,627)
Held-to-Maturity: Fair Value | 2,571,275 | 2,269,761
Commercial - Government Agencies - Sponsored Agencies |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 168,242 | 155,164
Available-for-Sale: Gross Unrealized Gains |  | 1,885
Available-for-Sale: Gross Unrealized Losses | (22,575) | (1,159)
Available-for-Sale: Fair Value | 145,667 | 155,890
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 448,945 | 481,695
Held-to-Maturity: Gross Unrealized Gains |  | 324
Held-to-Maturity: Gross Unrealized Losses | (86,951) | (12,355)
Held-to-Maturity: Fair Value | 361,994 | 469,664
Mortgage-Backed Securities |  |
Available-for-Sale: |  |
Available-for-Sale: Amortized Cost | 1,917,020 | 3,610,935
Available-for-Sale: Gross Unrealized Gains | 246 | 16,495
Available-for-Sale: Gross Unrealized Losses | (244,900) | (62,172)
Available-for-Sale: Fair Value | 1,672,366 | 3,565,258
Held-to-Maturity: |  |
Held-to-Maturity: Amortized Cost | 5,265,506 | 4,542,969
Held-to-Maturity: Gross Unrealized Gains | 43 | 27,971
Held-to-Maturity: Gross Unrealized Losses | (778,053) | (75,603)
Held-to-Maturity: Fair Value | $ 4,487,496 | $ 4,495,337

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