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Investment Securities - Schedule of AFS Debt Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | $ 309,470 | $ 238,023
Less Than 12 Months, Gross Unrealized Losses | (676) | (4,044)
12 Months or Longer, Fair Value | 2,050,731 | 2,089,545
12 Months or Longer, Gross Unrealized Losses | (258,459) | (281,739)
Total Fair Value | 2,360,201 | 2,327,568
Total Gross Unrealized Losses | (259,135) | (285,783)
Debt Securities Issued by the U.S. Treasury and Government Agencies |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 38,854 | 7,171
Less Than 12 Months, Gross Unrealized Losses | (288) | (16)
12 Months or Longer, Fair Value | 157,456 | 155,341
12 Months or Longer, Gross Unrealized Losses | (7,897) | (11,080)
Total Fair Value | 196,310 | 162,512
Total Gross Unrealized Losses | (8,185) | (11,096)
Debt Securities Issued by States and Political Subdivisions |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value |  | 237
Less Than 12 Months, Gross Unrealized Losses |  | (2)
12 Months or Longer, Fair Value | 63,644 | 63,509
12 Months or Longer, Gross Unrealized Losses | (9,349) | (9,609)
Total Fair Value | 63,644 | 63,746
Total Gross Unrealized Losses | (9,349) | (9,611)
Debt Securities Issued by Government-Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
12 Months or Longer, Fair Value | 1,464 | 1,476
12 Months or Longer, Gross Unrealized Losses | (41) | (80)
Total Fair Value | 1,464 | 1,476
Total Gross Unrealized Losses | (41) | (80)
Debt Securities Issued by Corporations |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 24,892 | 220,987
Less Than 12 Months, Gross Unrealized Losses | (108) | (4,013)
12 Months or Longer, Fair Value | 546,407 | 411,573
12 Months or Longer, Gross Unrealized Losses | (32,172) | (44,430)
Total Fair Value | 571,299 | 632,560
Total Gross Unrealized Losses | (32,280) | (48,443)
Residential - Government Agencies or Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 153,104 | 9,624
Less Than 12 Months, Gross Unrealized Losses | (275) | (13)
12 Months or Longer, Fair Value | 673,141 | 763,476
12 Months or Longer, Gross Unrealized Losses | (115,126) | (118,138)
Total Fair Value | 826,245 | 773,100
Total Gross Unrealized Losses | (115,401) | (118,151)
Commercial - Government Agencies or Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 92,485 |
Less Than 12 Months, Gross Unrealized Losses | (5) |
12 Months or Longer, Fair Value | 128,430 | 134,923
12 Months or Longer, Gross Unrealized Losses | (23,416) | (22,592)
Total Fair Value | 220,915 | 134,923
Total Gross Unrealized Losses | (23,421) | (22,592)
Collateralized Mortgage Obligations |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 245,589 | 9,624
Less Than 12 Months, Gross Unrealized Losses | (280) | (13)
12 Months or Longer, Fair Value | 801,571 | 898,399
12 Months or Longer, Gross Unrealized Losses | (138,542) | (140,730)
Total Fair Value | 1,047,160 | 908,023
Total Gross Unrealized Losses | (138,822) | (140,743)
Residential - Government Agencies or Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 135 | 4
12 Months or Longer, Fair Value | 480,189 | 559,247
12 Months or Longer, Gross Unrealized Losses | (70,458) | (75,810)
Total Fair Value | 480,324 | 559,251
Total Gross Unrealized Losses | (70,458) | (75,810)
Mortgage-Backed Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 135 | 4
12 Months or Longer, Fair Value | 480,189 | 559,247
12 Months or Longer, Gross Unrealized Losses | (70,458) | (75,810)
Total Fair Value | 480,324 | 559,251
Total Gross Unrealized Losses | $ (70,458) | $ (75,810)

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