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v3.26.1

Segment information - Information about Company's Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Segment Reporting [Line Items] |  |  |  |
Net Interest Income | $ 1,792,000 | $ 1,713,000 | $ 3,544,000 | $ 3,408,000
Noninterest income | 740,000 | 683,000 | 1,429,000 | 1,294,000
Provision for credit losses | 120,000 | 125,000 | 260,000 | 255,000
Provision for credit losses | 120,000 | 105,000 | 245,000 | 235,000
Salaries and employee benefits | 826,000 | 813,000 | 1,740,000 | 1,700,000
Depreciation and amortization |  |  | 156,000 | 164,000
Income before taxes | 1,063,000 | 935,000 | 1,926,000 | 1,696,000
Income tax expense (benefit) | 245,000 | 219,000 | 444,000 | 396,000
Net income (loss) | 818,000 | 716,000 | 1,482,000 | 1,300,000
Operating Segments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net Interest Income | 1,792,000 | 1,713,000 | 3,544,000 | 3,408,000
Noninterest income | 740,000 | 683,000 | 1,429,000 | 1,294,000
Total revenue | 2,532,000 | 2,396,000 | 4,973,000 | 4,702,000
Salaries and employee benefits | 826,000 | 813,000 | 1,740,000 | 1,700,000
Depreciation and amortization | 93,000 | 124,000 | 190,000 | 254,000
Other direct expenses | 430,000 | 399,000 | 857,000 | 797,000
Indirect expense | 0 | 0 | 0 | 0
Income before taxes | 1,063,000 | 935,000 | 1,926,000 | 1,696,000
Income tax expense (benefit) | 245,000 | 219,000 | 444,000 | 396,000
Average total assets | 216,532,000 | 210,261,000 | 215,186,000 | 209,296,000
Commercial Bank | Operating Segments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net Interest Income | 559,000 | 531,000 | 1,094,000 | 1,060,000
Noninterest income | 193,000 | 205,000 | 386,000 | 378,000
Total revenue | 752,000 | 736,000 | 1,480,000 | 1,438,000
Provision for credit losses | 23,000 | 60,000 | 52,000 | 96,000
Salaries and employee benefits | 145,000 | 150,000 | 290,000 | 301,000
Depreciation and amortization | 11,000 | 11,000 | 21,000 | 21,000
Other direct expenses | 73,000 | 73,000 | 151,000 | 140,000
Indirect expense | 134,000 | 129,000 | 261,000 | 252,000
Income before taxes | 366,000 | 313,000 | 705,000 | 628,000
Income tax expense (benefit) | 95,000 | 82,000 | 184,000 | 166,000
Net income (loss) | 271,000 | 231,000 | 521,000 | 462,000
Average total assets | 80,930,000 | 78,497,000 | 79,873,000 | 78,927,000
Retail Bank | Operating Segments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net Interest Income | 974,000 | 988,000 | 1,924,000 | 1,960,000
Noninterest income | 236,000 | 234,000 | 453,000 | 442,000
Total revenue | 1,210,000 | 1,222,000 | 2,377,000 | 2,402,000
Provision for credit losses | 70,000 | 71,000 | 152,000 | 150,000
Salaries and employee benefits | 203,000 | 201,000 | 400,000 | 397,000
Depreciation and amortization | 34,000 | 60,000 | 70,000 | 122,000
Other direct expenses | 107,000 | 95,000 | 210,000 | 194,000
Indirect expense | 313,000 | 292,000 | 602,000 | 571,000
Income before taxes | 483,000 | 503,000 | 943,000 | 968,000
Income tax expense (benefit) | 123,000 | 128,000 | 239,000 | 246,000
Net income (loss) | 360,000 | 375,000 | 704,000 | 722,000
Average total assets | 60,204,000 | 55,995,000 | 59,516,000 | 55,193,000
Institutional Services and Wealth Management | Operating Segments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net Interest Income | 149,000 | 166,000 | 305,000 | 337,000
Noninterest income | 235,000 | 225,000 | 456,000 | 434,000
Total revenue | 384,000 | 391,000 | 761,000 | 771,000
Provision for credit losses | 0 | 2,000 | 0 | 5,000
Salaries and employee benefits | 112,000 | 107,000 | 221,000 | 213,000
Depreciation and amortization | 2,000 | 2,000 | 4,000 | 4,000
Other direct expenses | 28,000 | 26,000 | 63,000 | 52,000
Indirect expense | 81,000 | 82,000 | 161,000 | 163,000
Income before taxes | 161,000 | 172,000 | 312,000 | 334,000
Income tax expense (benefit) | 41,000 | 44,000 | 80,000 | 85,000
Net income (loss) | 120,000 | 128,000 | 232,000 | 249,000
Average total assets | 4,728,000 | 4,272,000 | 4,736,000 | 4,187,000
All Other | Operating Segments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net Interest Income | 110,000 | 28,000 | 221,000 | 51,000
Noninterest income | 76,000 | 19,000 | 134,000 | 40,000
Total revenue | 186,000 | 47,000 | 355,000 | 91,000
Provision for credit losses | 27,000 | (8,000) | 56,000 | 4,000
Salaries and employee benefits | 366,000 | 355,000 | 829,000 | 789,000
Depreciation and amortization | 46,000 | 51,000 | 95,000 | 107,000
Other direct expenses | 222,000 | 205,000 | 433,000 | 411,000
Indirect expense | (528,000) | (503,000) | (1,024,000) | (986,000)
Income before taxes | 53,000 | (53,000) | (34,000) | (234,000)
Income tax expense (benefit) | (14,000) | (35,000) | (59,000) | (101,000)
Net income (loss) | 67,000 | (18,000) | 25,000 | (133,000)
Average total assets | $ 70,670,000 | $ 71,497,000 | $ 71,061,000 | $ 70,989,000

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