Loans - Weighted Average Risk Grades for All Commercial Loans by Class (Detail)
$ in Thousands |
Jun. 30, 2026
USD ($)
Grade
|
Dec. 31, 2025
USD ($)
Grade
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Loans, net of unearned discounts |
$ 22,975,658
|
$ 21,891,812
|
| Commercial Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
6.47
|
6.44
|
| Loans, net of unearned discounts |
$ 6,325,658
|
$ 6,306,980
|
| Commercial and Industrial Total Energy Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
6.12
|
6.16
|
| Loans, net of unearned discounts |
$ 1,133,640
|
$ 1,094,669
|
| Commercial Real Estate Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
7.09
|
7.08
|
| Loans, net of unearned discounts |
$ 4,297,680
|
$ 3,987,913
|
| Commercial Real Estate Non-Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
7.17
|
7.18
|
| Loans, net of unearned discounts |
$ 3,970,141
|
$ 3,773,028
|
| Construction Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
7.80
|
7.78
|
| Loans, net of unearned discounts |
$ 2,720,755
|
$ 2,549,869
|
| Commercial Real Estate Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
7.29
|
7.29
|
| Loans, net of unearned discounts |
$ 10,988,576
|
$ 10,310,810
|
| Risk Grade One To Eight [Member] | Commercial Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
6.17
|
6.06
|
| Loans, net of unearned discounts |
$ 5,824,944
|
$ 5,663,146
|
| Risk Grade One To Eight [Member] | Commercial and Industrial Total Energy Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
5.82
|
5.86
|
| Loans, net of unearned discounts |
$ 1,045,711
|
$ 1,010,179
|
| Risk Grade One To Eight [Member] | Commercial Real Estate Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
6.83
|
6.77
|
| Loans, net of unearned discounts |
$ 3,953,439
|
$ 3,608,005
|
| Risk Grade One To Eight [Member] | Commercial Real Estate Non-Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
7.02
|
6.96
|
| Loans, net of unearned discounts |
$ 3,775,790
|
$ 3,494,323
|
| Risk Grade One To Eight [Member] | Construction Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
7.53
|
7.61
|
| Loans, net of unearned discounts |
$ 2,463,512
|
$ 2,319,413
|
| Risk Grade One To Eight [Member] | Commercial Real Estate Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
|
7.05
|
| Loans, net of unearned discounts |
|
$ 9,421,741
|
| Risk Grade Nine [Member] | Commercial Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
9.00
|
9.00
|
| Loans, net of unearned discounts |
$ 187,777
|
$ 384,532
|
| Risk Grade Nine [Member] | Commercial and Industrial Total Energy Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
9.00
|
9.00
|
| Loans, net of unearned discounts |
$ 38,036
|
$ 35,392
|
| Risk Grade Nine [Member] | Commercial Real Estate Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
9.00
|
9.00
|
| Loans, net of unearned discounts |
$ 132,288
|
$ 163,132
|
| Risk Grade Nine [Member] | Commercial Real Estate Non-Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
9.00
|
9.00
|
| Loans, net of unearned discounts |
$ 70,189
|
$ 75,560
|
| Risk Grade Nine [Member] | Construction Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
9.00
|
9.00
|
| Loans, net of unearned discounts |
$ 78,065
|
$ 127,496
|
| Risk Grade Nine [Member] | Commercial Real Estate Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
|
9.00
|
| Loans, net of unearned discounts |
|
$ 366,188
|
| Risk Grade Ten [Member] | Commercial Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
10.00
|
10.00
|
| Loans, net of unearned discounts |
$ 204,748
|
$ 94,182
|
| Risk Grade Ten [Member] | Commercial and Industrial Total Energy Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
10.00
|
10.00
|
| Loans, net of unearned discounts |
$ 43,169
|
$ 40,813
|
| Risk Grade Ten [Member] | Commercial Real Estate Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
10.00
|
10.00
|
| Loans, net of unearned discounts |
$ 89,599
|
$ 64,117
|
| Risk Grade Ten [Member] | Commercial Real Estate Non-Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
10.00
|
10.00
|
| Loans, net of unearned discounts |
$ 44,961
|
$ 143,606
|
| Risk Grade Ten [Member] | Construction Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
10.00
|
10.00
|
| Loans, net of unearned discounts |
$ 79,550
|
$ 88,400
|
| Risk Grade Ten [Member] | Commercial Real Estate Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
|
10.00
|
| Loans, net of unearned discounts |
|
$ 296,123
|
| Risk Grade Eleven [Member] | Commercial Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
11.00
|
11.00
|
| Loans, net of unearned discounts |
$ 84,498
|
$ 114,461
|
| Risk Grade Eleven [Member] | Commercial and Industrial Total Energy Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
11.00
|
11.00
|
| Loans, net of unearned discounts |
$ 4,201
|
$ 5,262
|
| Risk Grade Eleven [Member] | Commercial Real Estate Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
11.00
|
11.00
|
| Loans, net of unearned discounts |
$ 108,171
|
$ 145,078
|
| Risk Grade Eleven [Member] | Commercial Real Estate Non-Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
11.00
|
11.00
|
| Loans, net of unearned discounts |
$ 74,635
|
$ 59,074
|
| Risk Grade Eleven [Member] | Construction Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
11.00
|
11.00
|
| Loans, net of unearned discounts |
$ 43,574
|
$ 12,686
|
| Risk Grade Eleven [Member] | Commercial Real Estate Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
|
11.00
|
| Loans, net of unearned discounts |
|
$ 216,838
|
| Risk Grade Twelve [Member] | Commercial Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
12.00
|
12.00
|
| Loans, net of unearned discounts |
$ 16,007
|
$ 34,041
|
| Risk Grade Twelve [Member] | Commercial and Industrial Total Energy Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
12.00
|
12.00
|
| Loans, net of unearned discounts |
$ 1,823
|
$ 2,323
|
| Risk Grade Twelve [Member] | Commercial Real Estate Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
12.00
|
12.00
|
| Loans, net of unearned discounts |
$ 13,461
|
$ 6,859
|
| Risk Grade Twelve [Member] | Commercial Real Estate Non-Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
12.00
|
12.00
|
| Loans, net of unearned discounts |
$ 4,566
|
$ 465
|
| Risk Grade Twelve [Member] | Construction Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
12.00
|
12.00
|
| Loans, net of unearned discounts |
$ 54,141
|
$ 1,361
|
| Risk Grade Twelve [Member] | Commercial Real Estate Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
|
12.00
|
| Loans, net of unearned discounts |
|
$ 8,685
|
| Risk Grade Thirteen [Member] | Commercial Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
13.00
|
13.00
|
| Loans, net of unearned discounts |
$ 7,684
|
$ 16,618
|
| Risk Grade Thirteen [Member] | Commercial and Industrial Total Energy Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
13.00
|
13.00
|
| Loans, net of unearned discounts |
$ 700
|
$ 700
|
| Risk Grade Thirteen [Member] | Commercial Real Estate Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
13.00
|
13.00
|
| Loans, net of unearned discounts |
$ 722
|
$ 722
|
| Risk Grade Thirteen [Member] | Commercial Real Estate Non-Owner Occupied |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
13.00
|
13.00
|
| Loans, net of unearned discounts |
$ 0
|
$ 0
|
| Risk Grade Thirteen [Member] | Construction Loans [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
13.00
|
13.00
|
| Loans, net of unearned discounts |
$ 1,913
|
$ 513
|
| Risk Grade Thirteen [Member] | Commercial Real Estate Portfolio Segment [Member] |
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
| Weighted Average Risk Grade | Grade |
|
13.00
|
| Loans, net of unearned discounts |
|
$ 1,235
|