v3.26.1
Loans And Allowance For Credit Losses (Summary of Activity in the Allowance for Credit Losses) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance for Credit Loss, Beginning Balance $ 198,605 $ 167,031 $ 179,468 $ 162,742
Financing Receivable at acquisition on purchased credit deteriorated loans, Excluding Accrued Interest, after Allowance for Credit Loss 0   2,958  
Financing Receivable at acquisition on purchased seasoned loans, Excluding Accrued Interest, after Allowance for Credit Loss 0   19,870  
Provision for credit losses on loans 6,311 7,919 17,594 23,014
Loans charged off 12,058 12,025 29,275 25,318
Recoveries on Loans 2,517 2,335 4,760 4,822
Net loan charge-offs (recoveries) 9,541 9,690 24,515 20,496
Allowance for Credit Loss, Ending Balance 195,375 165,260 195,375 165,260
Liability for Unfunded Lending Commitments, Beginning Balance 17,699 18,327 17,660 18,935
Off-Balance-Sheet, Credit Loss at Acquisition, Liability 0   362  
Provision for credit losses on unfunded lending commitments 2,420 (2,322) 2,097 (2,930)
Liability for Unfunded Lending Commitments, Ending Balance 20,119 16,005 20,119 16,005
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS 215,494 181,265 215,494 181,265
Commercial Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance for Credit Loss, Beginning Balance 125,237 106,700 116,865 106,769
Financing Receivable at acquisition on purchased credit deteriorated loans, Excluding Accrued Interest, after Allowance for Credit Loss 0   1,534  
Financing Receivable at acquisition on purchased seasoned loans, Excluding Accrued Interest, after Allowance for Credit Loss 0   7,721  
Provision for credit losses on loans (1,390) 185 3,373 539
Loans charged off 376 495 6,175 1,221
Recoveries on Loans 159 464 312 767
Net loan charge-offs (recoveries) 217 31 5,863 454
Allowance for Credit Loss, Ending Balance 123,630 106,854 123,630 106,854
Liability for Unfunded Lending Commitments, Beginning Balance 16,566 17,047 16,539 17,887
Off-Balance-Sheet, Credit Loss at Acquisition, Liability 0   362  
Provision for credit losses on unfunded lending commitments 2,442 (2,276) 2,107 (3,116)
Liability for Unfunded Lending Commitments, Ending Balance 19,008 14,771 19,008 14,771
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS 142,638 121,625 142,638 121,625
Personal Banking Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Roll Forward]        
Allowance for Credit Loss, Beginning Balance 73,368 60,331 62,603 55,973
Financing Receivable at acquisition on purchased credit deteriorated loans, Excluding Accrued Interest, after Allowance for Credit Loss 0   1,424  
Financing Receivable at acquisition on purchased seasoned loans, Excluding Accrued Interest, after Allowance for Credit Loss 0   12,149  
Provision for credit losses on loans 7,701 7,734 14,221 22,475
Loans charged off 11,682 11,530 23,100 24,097
Recoveries on Loans 2,358 1,871 4,448 4,055
Net loan charge-offs (recoveries) 9,324 9,659 18,652 20,042
Allowance for Credit Loss, Ending Balance 71,745 58,406 71,745 58,406
Liability for Unfunded Lending Commitments, Beginning Balance 1,133 1,280 1,121 1,048
Off-Balance-Sheet, Credit Loss at Acquisition, Liability 0   0  
Provision for credit losses on unfunded lending commitments (22) (46) (10) 186
Liability for Unfunded Lending Commitments, Ending Balance 1,111 1,234 1,111 1,234
ALLOWANCE FOR CREDIT LOSSES ON LOANS AND LIABILITY FOR UNFUNDED LENDING COMMITMENTS $ 72,856 $ 59,640 $ 72,856 $ 59,640