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Loans And Allowance For Credit Losses (Credit Quality Indicators Commercial Loan Portfolio) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025
Credit Quality Indicator [Line Items] |  |
Total | $ 20,461,064 | $ 17,771,263
Business Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Total | 6,750,356 | 6,439,380
Real estate - construction and land |  |
Credit Quality Indicator [Line Items] |  |
Total | 1,581,789 | 1,438,012
Business Real Estate Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Total | 4,059,539 | 3,674,567
Commercial Portfolio Segment [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 926,963 | 3,575,521
Fiscal Year before Current Fiscal Year | 3,504,960 | 1,592,005
Two Years before Current Fiscal Year | 1,585,958 | 1,277,215
Three Years before Current Fiscal Year | 1,203,815 | 1,201,714
Four Years before Current Fiscal Year | 1,171,174 | 653,886
Prior | 1,404,450 | 797,985
Revolving Loans Amortized Cost Basis | 2,594,364 | 2,453,633
Total | 12,391,684 | 11,551,959
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff | 0 | 429
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff | 0 | 516
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff | 32 | 165
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff | 55 | 2
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff | 5,440 | 10
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff | 272 | 1,423
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 5,799 | 2,545
Commercial Portfolio Segment [Member] | Business Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 440,569 | 1,717,805
Fiscal Year before Current Fiscal Year | 1,575,861 | 852,790
Two Years before Current Fiscal Year | 825,441 | 575,767
Three Years before Current Fiscal Year | 547,916 | 434,267
Four Years before Current Fiscal Year | 413,136 | 257,307
Prior | 552,812 | 338,556
Revolving Loans Amortized Cost Basis | 2,394,621 | 2,262,888
Total | 6,750,356 | 6,439,380
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff | 0 | 389
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff | 0 | 116
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff | 32 | 165
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff | 55 | 2
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff | 24 | 10
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff | 272 | 1,423
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 383 | 2,105
Commercial Portfolio Segment [Member] | Real estate - construction and land |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 156,781 | 464,150
Fiscal Year before Current Fiscal Year | 562,138 | 283,778
Two Years before Current Fiscal Year | 325,625 | 381,821
Three Years before Current Fiscal Year | 310,634 | 265,189
Four Years before Current Fiscal Year | 197,155 | 22,105
Prior | 6,032 | 2,860
Revolving Loans Amortized Cost Basis | 23,424 | 18,109
Total | 1,581,789 | 1,438,012
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff | 0 | 40
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 0 | 40
Commercial Portfolio Segment [Member] | Business Real Estate Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 329,613 | 1,393,566
Fiscal Year before Current Fiscal Year | 1,366,961 | 455,437
Two Years before Current Fiscal Year | 434,892 | 319,627
Three Years before Current Fiscal Year | 345,265 | 502,258
Four Years before Current Fiscal Year | 560,883 | 374,474
Prior | 845,606 | 456,569
Revolving Loans Amortized Cost Basis | 176,319 | 172,636
Total | 4,059,539 | 3,674,567
Financing Receivable, Year One, Originated, Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff | 0 | 400
Financing Receivable, Excluding Accrued Interest, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Originated, More than Five Years before Current Fiscal Year, Writeoff | 5,416 | 0
Financing Receivable, Excluding Accrued Interest, Revolving, Writeoff | 0 | 0
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff | 5,416 | 400
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 926,963 | 3,489,006
Fiscal Year before Current Fiscal Year | 3,414,861 | 1,557,881
Two Years before Current Fiscal Year | 1,555,545 | 1,257,226
Three Years before Current Fiscal Year | 1,128,349 | 1,118,999
Four Years before Current Fiscal Year | 1,096,536 | 616,188
Prior | 1,338,881 | 728,797
Revolving Loans Amortized Cost Basis | 2,444,305 | 2,313,565
Total | 11,905,440 | 11,081,662
Commercial Portfolio Segment [Member] | Pass [Member] | Business Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 440,569 | 1,704,299
Fiscal Year before Current Fiscal Year | 1,543,502 | 847,973
Two Years before Current Fiscal Year | 805,900 | 568,361
Three Years before Current Fiscal Year | 543,237 | 416,732
Four Years before Current Fiscal Year | 398,031 | 252,398
Prior | 548,931 | 336,662
Revolving Loans Amortized Cost Basis | 2,254,771 | 2,129,247
Total | 6,534,941 | 6,255,672
Commercial Portfolio Segment [Member] | Pass [Member] | Real estate - construction and land |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 156,781 | 450,046
Fiscal Year before Current Fiscal Year | 548,196 | 283,778
Two Years before Current Fiscal Year | 325,625 | 379,456
Three Years before Current Fiscal Year | 252,478 | 239,314
Four Years before Current Fiscal Year | 171,259 | 3,857
Prior | 6,032 | 2,860
Revolving Loans Amortized Cost Basis | 23,424 | 18,109
Total | 1,483,795 | 1,377,420
Commercial Portfolio Segment [Member] | Pass [Member] | Business Real Estate Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 329,613 | 1,334,661
Fiscal Year before Current Fiscal Year | 1,323,163 | 426,130
Two Years before Current Fiscal Year | 424,020 | 309,409
Three Years before Current Fiscal Year | 332,634 | 462,953
Four Years before Current Fiscal Year | 527,246 | 359,933
Prior | 783,918 | 389,275
Revolving Loans Amortized Cost Basis | 166,110 | 166,209
Total | 3,886,704 | 3,448,570
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 86,419
Fiscal Year before Current Fiscal Year | 67,589 | 31,572
Two Years before Current Fiscal Year | 9,923 | 6,233
Three Years before Current Fiscal Year | 57,917 | 13,757
Four Years before Current Fiscal Year | 2,512 | 1,858
Prior | 466 | 3,340
Revolving Loans Amortized Cost Basis | 43,995 | 47,599
Total | 182,402 | 190,778
Commercial Portfolio Segment [Member] | Special Mention [Member] | Business Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 13,410
Fiscal Year before Current Fiscal Year | 10,239 | 4,149
Two Years before Current Fiscal Year | 24 | 2,661
Three Years before Current Fiscal Year | 698 | 1,536
Four Years before Current Fiscal Year | 130 | 893
Prior | 400 | 1,375
Revolving Loans Amortized Cost Basis | 40,163 | 47,568
Total | 51,654 | 71,592
Commercial Portfolio Segment [Member] | Special Mention [Member] | Real estate - construction and land |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 14,104
Fiscal Year before Current Fiscal Year | 13,942 | 0
Two Years before Current Fiscal Year | 0 | 0
Three Years before Current Fiscal Year | 55,816 | 0
Four Years before Current Fiscal Year | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Total | 69,758 | 14,104
Commercial Portfolio Segment [Member] | Special Mention [Member] | Business Real Estate Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 58,905
Fiscal Year before Current Fiscal Year | 43,408 | 27,423
Two Years before Current Fiscal Year | 9,899 | 3,572
Three Years before Current Fiscal Year | 1,403 | 12,221
Four Years before Current Fiscal Year | 2,382 | 965
Prior | 66 | 1,965
Revolving Loans Amortized Cost Basis | 3,832 | 31
Total | 60,990 | 105,082
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 96
Fiscal Year before Current Fiscal Year | 22,460 | 2,503
Two Years before Current Fiscal Year | 20,454 | 13,724
Three Years before Current Fiscal Year | 17,435 | 68,792
Four Years before Current Fiscal Year | 72,002 | 35,687
Prior | 55,857 | 51,340
Revolving Loans Amortized Cost Basis | 106,064 | 92,469
Total | 294,272 | 264,611
Commercial Portfolio Segment [Member] | Substandard [Member] | Business Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 96
Fiscal Year before Current Fiscal Year | 22,070 | 619
Two Years before Current Fiscal Year | 19,481 | 4,713
Three Years before Current Fiscal Year | 3,867 | 15,957
Four Years before Current Fiscal Year | 14,975 | 4,016
Prior | 3,480 | 519
Revolving Loans Amortized Cost Basis | 99,687 | 86,073
Total | 163,560 | 111,993
Commercial Portfolio Segment [Member] | Substandard [Member] | Real estate - construction and land |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 0
Fiscal Year before Current Fiscal Year | 0 | 0
Two Years before Current Fiscal Year | 0 | 2,365
Three Years before Current Fiscal Year | 2,340 | 25,875
Four Years before Current Fiscal Year | 25,896 | 18,248
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Total | 28,236 | 46,488
Commercial Portfolio Segment [Member] | Substandard [Member] | Business Real Estate Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 0
Fiscal Year before Current Fiscal Year | 390 | 1,884
Two Years before Current Fiscal Year | 973 | 6,646
Three Years before Current Fiscal Year | 11,228 | 26,960
Four Years before Current Fiscal Year | 31,131 | 13,423
Prior | 52,377 | 50,821
Revolving Loans Amortized Cost Basis | 6,377 | 6,396
Total | 102,476 | 106,130
Commercial Portfolio Segment [Member] | Non-Accrual [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 0
Fiscal Year before Current Fiscal Year | 50 | 49
Two Years before Current Fiscal Year | 36 | 32
Three Years before Current Fiscal Year | 114 | 166
Four Years before Current Fiscal Year | 124 | 153
Prior | 9,246 | 14,508
Revolving Loans Amortized Cost Basis | 0 | 0
Total | 9,570 | 14,908
Commercial Portfolio Segment [Member] | Non-Accrual [Member] | Business Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 0
Fiscal Year before Current Fiscal Year | 50 | 49
Two Years before Current Fiscal Year | 36 | 32
Three Years before Current Fiscal Year | 114 | 42
Four Years before Current Fiscal Year | 0 | 0
Prior | 1 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Total | 201 | 123
Commercial Portfolio Segment [Member] | Non-Accrual [Member] | Business Real Estate Loan [Member] |  |
Credit Quality Indicator [Line Items] |  |
Current Fiscal Year | 0 | 0
Fiscal Year before Current Fiscal Year | 0 | 0
Two Years before Current Fiscal Year | 0 | 0
Three Years before Current Fiscal Year | 0 | 124
Four Years before Current Fiscal Year | 124 | 153
Prior | 9,245 | 14,508
Revolving Loans Amortized Cost Basis | 0 | 0
Total | $ 9,369 | $ 14,785

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