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Investment Securities - Unrealized Gross Losses and Fair Values of Securities in a Continuous Loss Position (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 USD ($) security shares | Dec. 31, 2024 USD ($) security shares | Dec. 31, 2023 USD ($) security shares
Securities in the available-for-sale portfolio in a continuous loss position |  |  |
Number of individual securities in a continuous loss position | security | 222 | 159 | 222
Time in Continuous Loss, Unrealized Losses |  |  |
Less Than 12 Months Unrealized Losses | $ (564) | $ (4,775) | $ (564)
12 Months or More Unrealized Losses | (302,818) | (259,563) | (302,818)
Total Unrealized Losses | (303,382) | (264,338) | (303,382)
Time in Continuous Loss, Fair Value |  |  |
Less Than 12 Months, Fair Value | 63,667 | 277,688 | 63,667
12 Months or More Fair Value | 2,170,608 | 1,443,285 | 2,170,608
Total Fair Value | 2,234,275 | $ 1,720,973 | $ 2,234,275
Number of securities with intent to sell | security |  | 0 | 0
Credit losses recognized on securities |  | $ 0 | $ 0
Allowance for credit losses, investment securities | 0 | $ 0 | $ 0
Investment securities comprised of collateralized loan obligations rated AA or better and obligations issued by local state and political subdivisions rated AA or better |  | 5.00% | 5.00%
Class B restricted shares |  |  |
Time in Continuous Loss, Fair Value |  |  |
Net realized gain | $ 40,800 |  |
Shares held | shares | 0 | 0 | 0
Number of shares sold | shares | 120,000 |  |
U.S. Treasury and government agency debt securities |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
12 Months or More Unrealized Losses | $ (666) | $ (23) | $ (666)
Total Unrealized Losses | (666) | (23) | (666)
Time in Continuous Loss, Fair Value |  |  |
12 Months or More Fair Value | 32,503 | 8,147 | 32,503
Total Fair Value | 32,503 | 8,147 | 32,503
Government-sponsored enterprises debt securities |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
12 Months or More Unrealized Losses | (408) |  | (408)
Total Unrealized Losses | (408) |  | (408)
Time in Continuous Loss, Fair Value |  |  |
12 Months or More Fair Value | 19,592 |  | 19,592
Total Fair Value | 19,592 |  | 19,592
Residential - Government-sponsored enterprises |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
Less Than 12 Months Unrealized Losses |  | (2,997) |
12 Months or More Unrealized Losses | (112,124) | (99,726) | (112,124)
Total Unrealized Losses | (112,124) | (102,723) | (112,124)
Time in Continuous Loss, Fair Value |  |  |
Less Than 12 Months, Fair Value |  | 116,084 |
12 Months or More Fair Value | 783,297 | 622,029 | 783,297
Total Fair Value | 783,297 | 738,113 | 783,297
Residential - Government agency |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
Less Than 12 Months Unrealized Losses |  | (154) |
12 Months or More Unrealized Losses | (1,121) | (1,460) | (1,121)
Total Unrealized Losses | (1,121) | (1,614) | (1,121)
Time in Continuous Loss, Fair Value |  |  |
Less Than 12 Months, Fair Value |  | 27,127 |
12 Months or More Fair Value | 10,182 | 8,732 | 10,182
Total Fair Value | 10,182 | 35,859 | 10,182
Commercial - Government agency |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
12 Months or More Unrealized Losses | (50,270) | (53,223) | (50,270)
Total Unrealized Losses | (50,270) | (53,223) | (50,270)
Time in Continuous Loss, Fair Value |  |  |
12 Months or More Fair Value | 218,674 | 196,125 | 218,674
Total Fair Value | 218,674 | 196,125 | 218,674
Commercial - Government-sponsored enterprises |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
12 Months or More Unrealized Losses | (7,028) | (3,107) | (7,028)
Total Unrealized Losses | (7,028) | (3,107) | (7,028)
Time in Continuous Loss, Fair Value |  |  |
12 Months or More Fair Value | 86,431 | 44,908 | 86,431
Total Fair Value | 86,431 | 44,908 | 86,431
Commercial - Non-agency |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
12 Months or More Unrealized Losses | (281) |  | (281)
Total Unrealized Losses | (281) |  | (281)
Time in Continuous Loss, Fair Value |  |  |
12 Months or More Fair Value | 21,683 |  | 21,683
Total Fair Value | 21,683 |  | 21,683
Government agency |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
Less Than 12 Months Unrealized Losses |  | (712) |
12 Months or More Unrealized Losses | (67,568) | (54,202) | (67,568)
Total Unrealized Losses | (67,568) | (54,914) | (67,568)
Time in Continuous Loss, Fair Value |  |  |
Less Than 12 Months, Fair Value |  | 76,968 |
12 Months or More Fair Value | 471,150 | 310,171 | 471,150
Total Fair Value | 471,150 | 387,139 | 471,150
Government-sponsored enterprises |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
Less Than 12 Months Unrealized Losses |  | (912) |
12 Months or More Unrealized Losses | (61,856) | (47,822) | (61,856)
Total Unrealized Losses | (61,856) | (48,734) | (61,856)
Time in Continuous Loss, Fair Value |  |  |
Less Than 12 Months, Fair Value |  | 57,509 |
12 Months or More Fair Value | 363,970 | 253,173 | 363,970
Total Fair Value | 363,970 | $ 310,682 | 363,970
Collateralized loan obligations |  |  |
Time in Continuous Loss, Unrealized Losses |  |  |
Less Than 12 Months Unrealized Losses | (564) |  | (564)
12 Months or More Unrealized Losses | (1,496) |  | (1,496)
Total Unrealized Losses | (2,060) |  | (2,060)
Time in Continuous Loss, Fair Value |  |  |
Less Than 12 Months, Fair Value | 63,667 |  | 63,667
12 Months or More Fair Value | 163,126 |  | 163,126
Total Fair Value | $ 226,793 |  | $ 226,793

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