v3.26.1
Loans And Allowance For Credit Losses (Credit Quality Indicators Commercial Loan Portfolio) (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Credit Quality Indicator [Line Items]    
Total $ 20,833,481 $ 17,771,263
Business Loan [Member]    
Credit Quality Indicator [Line Items]    
Total 7,115,984 6,439,380
Real estate - construction and land    
Credit Quality Indicator [Line Items]    
Total 1,493,455 1,438,012
Business Real Estate Loan [Member]    
Credit Quality Indicator [Line Items]    
Total 4,064,253 3,674,567
Commercial Portfolio Segment [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 2,073,768 3,575,521
Fiscal Year before Current Fiscal Year 3,095,064 1,592,005
Two Years before Current Fiscal Year 1,387,612 1,277,215
Three Years before Current Fiscal Year 1,064,421 1,201,714
Four Years before Current Fiscal Year 1,074,135 653,886
Prior 1,213,686 797,985
Revolving Loans Amortized Cost Basis 2,765,006 2,453,633
Total 12,673,692 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 74 165
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 54 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 607 1,423
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 6,175 2,545
Commercial Portfolio Segment [Member] | Business Loan [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 1,133,384 1,717,805
Fiscal Year before Current Fiscal Year 1,465,916 852,790
Two Years before Current Fiscal Year 662,054 575,767
Three Years before Current Fiscal Year 441,084 434,267
Four Years before Current Fiscal Year 360,897 257,307
Prior 483,278 338,556
Revolving Loans Amortized Cost Basis 2,569,371 2,262,888
Total 7,115,984 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 74 165
Financing Receivable, Excluding Accrued Interest, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff 54 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 607 1,423
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff 759 2,105
Commercial Portfolio Segment [Member] | Real estate - construction and land    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 193,623 464,150
Fiscal Year before Current Fiscal Year 482,519 283,778
Two Years before Current Fiscal Year 333,075 381,821
Three Years before Current Fiscal Year 310,288 265,189
Four Years before Current Fiscal Year 143,932 22,105
Prior 5,868 2,860
Revolving Loans Amortized Cost Basis 24,150 18,109
Total 1,493,455 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 746,761 1,393,566
Fiscal Year before Current Fiscal Year 1,146,629 455,437
Two Years before Current Fiscal Year 392,483 319,627
Three Years before Current Fiscal Year 313,049 502,258
Four Years before Current Fiscal Year 569,306 374,474
Prior 724,540 456,569
Revolving Loans Amortized Cost Basis 171,485 172,636
Total 4,064,253 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 2,072,791 3,489,006
Fiscal Year before Current Fiscal Year 3,013,751 1,557,881
Two Years before Current Fiscal Year 1,342,052 1,257,226
Three Years before Current Fiscal Year 992,907 1,118,999
Four Years before Current Fiscal Year 980,227 616,188
Prior 1,149,300 728,797
Revolving Loans Amortized Cost Basis 2,623,363 2,313,565
Total 12,174,391 11,081,662
Commercial Portfolio Segment [Member] | Pass [Member] | Business Loan [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 1,132,958 1,704,299
Fiscal Year before Current Fiscal Year 1,420,625 847,973
Two Years before Current Fiscal Year 643,927 568,361
Three Years before Current Fiscal Year 437,560 416,732
Four Years before Current Fiscal Year 354,488 252,398
Prior 480,520 336,662
Revolving Loans Amortized Cost Basis 2,435,834 2,129,247
Total 6,905,912 6,255,672
Commercial Portfolio Segment [Member] | Pass [Member] | Real estate - construction and land    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 193,072 450,046
Fiscal Year before Current Fiscal Year 469,016 283,778
Two Years before Current Fiscal Year 316,468 379,456
Three Years before Current Fiscal Year 252,234 239,314
Four Years before Current Fiscal Year 118,015 3,857
Prior 5,868 2,860
Revolving Loans Amortized Cost Basis 24,150 18,109
Total 1,378,823 1,377,420
Commercial Portfolio Segment [Member] | Pass [Member] | Business Real Estate Loan [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 746,761 1,334,661
Fiscal Year before Current Fiscal Year 1,124,110 426,130
Two Years before Current Fiscal Year 381,657 309,409
Three Years before Current Fiscal Year 303,113 462,953
Four Years before Current Fiscal Year 507,724 359,933
Prior 662,912 389,275
Revolving Loans Amortized Cost Basis 163,379 166,209
Total 3,889,656 3,448,570
Commercial Portfolio Segment [Member] | Special Mention [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 600 86,419
Fiscal Year before Current Fiscal Year 29,828 31,572
Two Years before Current Fiscal Year 38,102 6,233
Three Years before Current Fiscal Year 57,759 13,757
Four Years before Current Fiscal Year 25,764 1,858
Prior 636 3,340
Revolving Loans Amortized Cost Basis 22,774 47,599
Total 175,463 190,778
Commercial Portfolio Segment [Member] | Special Mention [Member] | Business Loan [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 49 13,410
Fiscal Year before Current Fiscal Year 9,394 4,149
Two Years before Current Fiscal Year 11,638 2,661
Three Years before Current Fiscal Year 535 1,536
Four Years before Current Fiscal Year 385 893
Prior 400 1,375
Revolving Loans Amortized Cost Basis 21,211 47,568
Total 43,612 71,592
Commercial Portfolio Segment [Member] | Special Mention [Member] | Real estate - construction and land    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 551 14,104
Fiscal Year before Current Fiscal Year 435 0
Two Years before Current Fiscal Year 16,607 0
Three Years before Current Fiscal Year 55,838 0
Four Years before Current Fiscal Year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Total 73,431 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 19,999 27,423
Two Years before Current Fiscal Year 9,857 3,572
Three Years before Current Fiscal Year 1,386 12,221
Four Years before Current Fiscal Year 25,379 965
Prior 236 1,965
Revolving Loans Amortized Cost Basis 1,563 31
Total 58,420 105,082
Commercial Portfolio Segment [Member] | Substandard [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 377 96
Fiscal Year before Current Fiscal Year 51,485 2,503
Two Years before Current Fiscal Year 7,414 13,724
Three Years before Current Fiscal Year 13,708 68,792
Four Years before Current Fiscal Year 68,020 35,687
Prior 54,508 51,340
Revolving Loans Amortized Cost Basis 118,869 92,469
Total 314,381 264,611
Commercial Portfolio Segment [Member] | Substandard [Member] | Business Loan [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 377 96
Fiscal Year before Current Fiscal Year 35,897 619
Two Years before Current Fiscal Year 6,445 4,713
Three Years before Current Fiscal Year 2,942 15,957
Four Years before Current Fiscal Year 6,024 4,016
Prior 2,357 519
Revolving Loans Amortized Cost Basis 112,326 86,073
Total 166,368 111,993
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 13,068 0
Two Years before Current Fiscal Year 0 2,365
Three Years before Current Fiscal Year 2,216 25,875
Four Years before Current Fiscal Year 25,917 18,248
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Total 41,201 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 2,520 1,884
Two Years before Current Fiscal Year 969 6,646
Three Years before Current Fiscal Year 8,550 26,960
Four Years before Current Fiscal Year 36,079 13,423
Prior 52,151 50,821
Revolving Loans Amortized Cost Basis 6,543 6,396
Total 106,812 106,130
Commercial Portfolio Segment [Member] | Non-Accrual [Member]    
Credit Quality Indicator [Line Items]    
Current Fiscal Year 0 0
Fiscal Year before Current Fiscal Year 0 49
Two Years before Current Fiscal Year 44 32
Three Years before Current Fiscal Year 47 166
Four Years before Current Fiscal Year 124 153
Prior 9,242 14,508
Revolving Loans Amortized Cost Basis 0 0
Total 9,457 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 0 49
Two Years before Current Fiscal Year 44 32
Three Years before Current Fiscal Year 47 42
Four Years before Current Fiscal Year 0 0
Prior 1 0
Revolving Loans Amortized Cost Basis 0 0
Total 92 123
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 9,241 14,508
Revolving Loans Amortized Cost Basis 0 0
Total $ 9,365 $ 14,785