Fair Value Of Financial Instruments (Schedule Of Estimated Fair Value Of Financial Instruments) (Details) - USD ($)
$ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
| Carrying Amount |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
$ 20,833,481
|
$ 17,771,263
|
| Loans held for sale |
|
3,799
|
4,329
|
| Investment securities |
|
8,656,217
|
9,413,603
|
| Federal Funds Sold |
|
2,010
|
|
| Securities purchased under agreements to resell |
|
1,150,000
|
850,000
|
| Interest earning deposits with banks |
|
2,260,162
|
2,744,393
|
| Cash and due from banks |
|
645,674
|
803,239
|
| Derivative Asset |
|
44,154
|
51,421
|
| Assets held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Assets, Fair Value Financial Instruments |
|
33,620,066
|
31,661,524
|
| Non-interest bearing deposits |
|
8,172,552
|
8,205,711
|
| Savings, interest checking and money market deposits |
|
17,320,654
|
15,047,406
|
| Certificates of deposits |
|
2,382,496
|
2,386,459
|
| Federal funds purchased |
|
121,820
|
128,625
|
| Securities sold under agreements to repurchase |
|
2,306,471
|
2,861,016
|
| Other borrowings |
|
26,183
|
12,739
|
| Derivative Liabilities |
|
16,722
|
18,795
|
| Liabilities held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Financial Liabilities Fair Value Disclosure |
|
30,371,467
|
28,684,027
|
| Carrying Amount | Business Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
7,115,984
|
6,439,380
|
| Carrying Amount | Real estate - construction and land |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
1,493,455
|
1,438,012
|
| Carrying Amount | Business Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
4,064,253
|
3,674,567
|
| Carrying Amount | Personal Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
4,369,077
|
3,053,435
|
| Carrying Amount | Consumer Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
2,527,448
|
2,196,822
|
| Carrying Amount | Revolving home equity |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
649,332
|
375,159
|
| Carrying Amount | Credit Card Receivable [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
561,277
|
589,694
|
| Carrying Amount | Overdrafts |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
52,655
|
4,194
|
| Estimate of Fair Value Measurement [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
20,251,579
|
17,327,602
|
| Loans held for sale |
|
3,799
|
4,329
|
| Investment securities |
|
8,656,217
|
9,413,603
|
| Federal Funds Sold |
|
2,010
|
|
| Securities purchased under agreements to resell |
|
1,149,880
|
869,427
|
| Interest earning deposits with banks |
|
2,260,162
|
2,744,393
|
| Cash and due from banks |
|
645,674
|
803,239
|
| Derivative Asset |
|
44,154
|
51,421
|
| Assets held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Assets, Fair Value Financial Instruments |
|
33,038,044
|
31,237,290
|
| Non-interest bearing deposits |
|
8,172,552
|
8,205,711
|
| Savings, interest checking and money market deposits |
|
17,320,654
|
15,047,406
|
| Certificates of deposits |
|
2,407,213
|
2,418,268
|
| Federal funds purchased |
|
121,820
|
128,625
|
| Securities sold under agreements to repurchase |
|
2,308,593
|
2,863,921
|
| Other borrowings |
|
26,183
|
12,739
|
| Derivative Liabilities |
|
16,722
|
18,795
|
| Liabilities held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Financial Liabilities Fair Value Disclosure |
|
30,398,306
|
28,718,741
|
| Estimate of Fair Value Measurement [Member] | Business Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
7,013,375
|
6,367,754
|
| Estimate of Fair Value Measurement [Member] | Real estate - construction and land |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
1,465,846
|
1,415,490
|
| Estimate of Fair Value Measurement [Member] | Business Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
3,985,828
|
3,628,499
|
| Estimate of Fair Value Measurement [Member] | Personal Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
4,086,228
|
2,815,384
|
| Estimate of Fair Value Measurement [Member] | Consumer Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
2,505,133
|
2,188,772
|
| Estimate of Fair Value Measurement [Member] | Revolving home equity |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
634,254
|
371,998
|
| Estimate of Fair Value Measurement [Member] | Credit Card Receivable [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
508,391
|
535,660
|
| Estimate of Fair Value Measurement [Member] | Overdrafts |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
52,524
|
4,045
|
| Estimate of Fair Value Measurement [Member] | Level 1 |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Loans held for sale |
|
0
|
0
|
| Investment securities |
|
3,528,342
|
3,339,866
|
| Federal Funds Sold |
|
2,010
|
|
| Securities purchased under agreements to resell |
|
0
|
0
|
| Interest earning deposits with banks |
|
2,260,162
|
2,744,393
|
| Cash and due from banks |
|
645,674
|
803,239
|
| Derivative Asset |
|
0
|
0
|
| Assets held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Assets, Fair Value Financial Instruments |
|
6,460,757
|
6,910,774
|
| Non-interest bearing deposits |
|
8,172,552
|
8,205,711
|
| Savings, interest checking and money market deposits |
|
17,320,654
|
15,047,406
|
| Certificates of deposits |
|
0
|
0
|
| Federal funds purchased |
|
121,820
|
128,625
|
| Securities sold under agreements to repurchase |
|
0
|
0
|
| Other borrowings |
|
20,756
|
12,739
|
| Derivative Liabilities |
|
0
|
0
|
| Liabilities held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Financial Liabilities Fair Value Disclosure |
|
25,660,351
|
23,417,757
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Business Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Real estate - construction and land |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Business Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Personal Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Consumer Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Revolving home equity |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Credit Card Receivable [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 1 | Overdrafts |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Loans held for sale |
|
3,799
|
4,329
|
| Investment securities |
|
4,884,173
|
5,842,326
|
| Federal Funds Sold |
|
0
|
|
| Securities purchased under agreements to resell |
|
0
|
0
|
| Interest earning deposits with banks |
|
0
|
0
|
| Cash and due from banks |
|
0
|
0
|
| Derivative Asset |
|
43,978
|
51,232
|
| Assets held in trust for deferred compensation plan |
|
0
|
0
|
| Assets, Fair Value Financial Instruments |
|
4,931,950
|
5,897,887
|
| Non-interest bearing deposits |
|
0
|
0
|
| Savings, interest checking and money market deposits |
|
0
|
0
|
| Certificates of deposits |
|
0
|
0
|
| Federal funds purchased |
|
0
|
0
|
| Securities sold under agreements to repurchase |
|
0
|
0
|
| Other borrowings |
|
5,427
|
0
|
| Derivative Liabilities |
|
16,692
|
18,718
|
| Liabilities held in trust for deferred compensation plan |
|
0
|
0
|
| Financial Liabilities Fair Value Disclosure |
|
22,119
|
18,718
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Business Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Real estate - construction and land |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Business Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Personal Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Consumer Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Revolving home equity |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Credit Card Receivable [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Level 2 | Overdrafts |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
0
|
0
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
20,251,579
|
17,327,602
|
| Loans held for sale |
|
0
|
0
|
| Investment securities |
|
243,702
|
231,411
|
| Federal Funds Sold |
|
0
|
|
| Securities purchased under agreements to resell |
|
1,149,880
|
869,427
|
| Interest earning deposits with banks |
|
0
|
0
|
| Cash and due from banks |
|
0
|
0
|
| Derivative Asset |
|
176
|
189
|
| Assets held in trust for deferred compensation plan |
|
0
|
0
|
| Assets, Fair Value Financial Instruments |
|
21,645,337
|
18,428,629
|
| Non-interest bearing deposits |
|
0
|
0
|
| Savings, interest checking and money market deposits |
|
0
|
0
|
| Certificates of deposits |
|
2,407,213
|
2,418,268
|
| Federal funds purchased |
|
0
|
0
|
| Securities sold under agreements to repurchase |
|
2,308,593
|
2,863,921
|
| Other borrowings |
|
0
|
0
|
| Derivative Liabilities |
|
30
|
77
|
| Liabilities held in trust for deferred compensation plan |
|
0
|
0
|
| Financial Liabilities Fair Value Disclosure |
|
4,715,836
|
5,282,266
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Business Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
7,013,375
|
6,367,754
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Real estate - construction and land |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
1,465,846
|
1,415,490
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Business Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
3,985,828
|
3,628,499
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Personal Real Estate Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
4,086,228
|
2,815,384
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Consumer Loan [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
2,505,133
|
2,188,772
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Revolving home equity |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
634,254
|
371,998
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Credit Card Receivable [Member] |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
508,391
|
535,660
|
| Estimate of Fair Value Measurement [Member] | Significant Unobservable Inputs (Level 3) | Overdrafts |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Loans |
|
52,524
|
4,045
|
| Federal Funds Sold |
|
2,010
|
0
|
| Securities purchased under agreements to resell |
|
1,150,000
|
850,000
|
| Interest earning deposits with banks |
|
2,260,162
|
2,744,393
|
| Cash and due from banks |
|
645,674
|
803,239
|
| Derivative Asset |
[1] |
44,154
|
51,421
|
| Assets held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Non-interest bearing deposits |
|
8,172,552
|
8,205,711
|
| Savings, interest checking and money market deposits |
|
17,320,654
|
15,047,406
|
| Other borrowings |
|
26,291
|
12,798
|
| Derivative Liabilities |
[1] |
16,722
|
18,795
|
| Liabilities held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Level 1 |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Derivative Asset |
[1] |
0
|
0
|
| Assets held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Derivative Liabilities |
[1] |
0
|
0
|
| Liabilities held in trust for deferred compensation plan |
|
24,569
|
23,276
|
| Level 2 |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Derivative Asset |
[1] |
43,978
|
51,232
|
| Assets held in trust for deferred compensation plan |
|
0
|
0
|
| Derivative Liabilities |
[1] |
16,692
|
18,718
|
| Liabilities held in trust for deferred compensation plan |
|
0
|
0
|
| Significant Unobservable Inputs (Level 3) |
|
|
|
| Fair Value, Balance Sheet Grouping [Line Items] |
|
|
|
| Derivative Asset |
[1] |
176
|
189
|
| Assets held in trust for deferred compensation plan |
|
0
|
0
|
| Derivative Liabilities |
[1] |
30
|
77
|
| Liabilities held in trust for deferred compensation plan |
|
$ 0
|
$ 0
|
|
|