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Loans And Allowance For Credit Losses (Aging Information On Past Due And Accruing Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | $ 17,582,050 | $ 17,093,789
30 - 89 Days Past Due | 39,245 | 83,520
90 Days Past Due and Still Accruing | 25,303 | 24,516
Non-accrual loans | 18,870 | 18,278
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 17,665,468 | 17,220,103
Business Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 6,328,684 | 6,053,820
Real estate - construction and land |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 1,405,398 | 1,409,901
Business Real Estate Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 3,757,778 | 3,661,218
Personal Real Estate Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 3,058,845 | 3,058,195
Consumer Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 2,157,867 | 2,073,123
Revolving home equity |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 364,429 | 356,650
Credit Card Receivable [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 576,151 | 595,930
Overdrafts |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Total | 16,316 | 11,266
Commercial Portfolio Segment [Member] | Business Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 6,325,992 | 6,051,654
30 - 89 Days Past Due | 1,168 | 1,501
90 Days Past Due and Still Accruing | 1,114 | 564
Non-accrual loans | 410 | 101
Commercial Portfolio Segment [Member] | Real estate - construction and land |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 1,404,827 | 1,409,681
30 - 89 Days Past Due | 145 | 0
90 Days Past Due and Still Accruing | 0 | 0
Non-accrual loans | 426 | 220
Commercial Portfolio Segment [Member] | Business Real Estate Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 3,742,041 | 3,640,643
30 - 89 Days Past Due | 628 | 5,621
90 Days Past Due and Still Accruing | 0 | 0
Non-accrual loans | 15,109 | 14,954
Personal Banking Portfolio Segment [Member] | Personal Real Estate Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 3,041,262 | 3,021,017
30 - 89 Days Past Due | 5,053 | 25,267
90 Days Past Due and Still Accruing | 11,582 | 10,885
Non-accrual loans | 948 | 1,026
Personal Banking Portfolio Segment [Member] | Consumer Loan [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 2,130,176 | 2,029,115
30 - 89 Days Past Due | 23,700 | 40,398
90 Days Past Due and Still Accruing | 3,991 | 3,610
Non-accrual loans | 0 | 0
Personal Banking Portfolio Segment [Member] | Revolving home equity |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 360,725 | 351,056
30 - 89 Days Past Due | 1,037 | 2,798
90 Days Past Due and Still Accruing | 690 | 819
Non-accrual loans | 1,977 | 1,977
Personal Banking Portfolio Segment [Member] | Credit Card Receivable [Member] |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 560,937 | 579,670
30 - 89 Days Past Due | 7,288 | 7,622
90 Days Past Due and Still Accruing | 7,926 | 8,638
Non-accrual loans | 0 | 0
Personal Banking Portfolio Segment [Member] | Overdrafts |  |
Loans And Allowance For Loan Losses [Line Items] |  |
Current or Less than 30 Days Past Due | 16,090 | 10,953
30 - 89 Days Past Due | 226 | 313
90 Days Past Due and Still Accruing | 0 | 0
Non-accrual loans | $ 0 | $ 0

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