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Investment Securities - Schedule of AFS Debt Securities in an Unrealized Loss Position (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | $ 776,320 | $ 309,470
Less Than 12 Months, Gross Unrealized Losses | (41,778) | (676)
12 Months or Longer, Fair Value | 1,620,297 | 2,050,731
12 Months or Longer, Gross Unrealized Losses | (165,168) | (258,459)
Total Fair Value | 2,396,617 | 2,360,201
Total Gross Unrealized Losses | (206,946) | (259,135)
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 | 44,920 | 38,854
Less Than 12 Months, Gross Unrealized Losses | (787) | (288)
12 Months or Longer, Fair Value | 101,097 | 157,456
12 Months or Longer, Gross Unrealized Losses | (4,333) | (7,897)
Total Fair Value | 146,017 | 196,310
Total Gross Unrealized Losses | (5,120) | (8,185)
Debt Securities Issued by States and Political Subdivisions |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 0
Less Than 12 Months, Gross Unrealized Losses | 0 | 0
12 Months or Longer, Fair Value | 65,560 | 63,644
12 Months or Longer, Gross Unrealized Losses | (6,983) | (9,349)
Total Fair Value | 65,560 | 63,644
Total Gross Unrealized Losses | (6,983) | (9,349)
Debt Securities Issued by U.S. Government-Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 0
Less Than 12 Months, Gross Unrealized Losses | 0 | 0
12 Months or Longer, Fair Value | 985 | 1,464
12 Months or Longer, Gross Unrealized Losses | (20) | (41)
Total Fair Value | 985 | 1,464
Total Gross Unrealized Losses | (20) | (41)
Debt Securities Issued by Corporations |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 171,062 | 24,892
Less Than 12 Months, Gross Unrealized Losses | (7,201) | (108)
12 Months or Longer, Fair Value | 456,022 | 546,407
12 Months or Longer, Gross Unrealized Losses | (17,951) | (32,172)
Total Fair Value | 627,084 | 571,299
Total Gross Unrealized Losses | (25,152) | (32,280)
Total Collateralized Mortgage Obligations |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 342,128 | 245,589
Less Than 12 Months, Gross Unrealized Losses | (8,155) | (280)
12 Months or Longer, Fair Value | 741,639 | 801,571
12 Months or Longer, Gross Unrealized Losses | (109,481) | (138,542)
Total Fair Value | 1,083,767 | 1,047,160
Total Gross Unrealized Losses | (117,636) | (138,822)
Residential - Government Agencies or Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 266,073 | 153,104
Less Than 12 Months, Gross Unrealized Losses | (7,996) | (275)
12 Months or Longer, Fair Value | 591,331 | 673,141
12 Months or Longer, Gross Unrealized Losses | (87,462) | (115,126)
Total Fair Value | 857,404 | 826,245
Total Gross Unrealized Losses | (95,458) | (115,401)
Commercial - Government Agencies or Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 71,066 | 92,485
Less Than 12 Months, Gross Unrealized Losses | (148) | (5)
12 Months or Longer, Fair Value | 150,308 | 128,430
12 Months or Longer, Gross Unrealized Losses | (22,019) | (23,416)
Total Fair Value | 221,374 | 220,915
Total Gross Unrealized Losses | (22,167) | (23,421)
Commercial - Non-Agency |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 4,989 |
Less Than 12 Months, Gross Unrealized Losses | (11) |
12 Months or Longer, Fair Value | 0 |
12 Months or Longer, Gross Unrealized Losses | 0 |
Total Fair Value | 4,989 |
Total Gross Unrealized Losses | (11) |
Total Mortgage-Backed Securities |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 218,210 | 135
Less Than 12 Months, Gross Unrealized Losses | (25,635) | 0
12 Months or Longer, Fair Value | 254,994 | 480,189
12 Months or Longer, Gross Unrealized Losses | (26,400) | (70,458)
Total Fair Value | 473,204 | 480,324
Total Gross Unrealized Losses | (52,035) | (70,458)
Residential - Government Agencies or Sponsored Enterprises |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 218,210 | 135
Less Than 12 Months, Gross Unrealized Losses | (25,635) | 0
12 Months or Longer, Fair Value | 254,994 | 480,189
12 Months or Longer, Gross Unrealized Losses | (26,400) | (70,458)
Total Fair Value | 473,204 | 480,324
Total Gross Unrealized Losses | $ (52,035) | $ (70,458)

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