v3.25.2
Loans Loans - Allowance for Credit Loss By Loan Class Calculated in Accordance With CECL Methodology (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest $ 277,803   $ 270,151      
Commercial Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 95,484 $ 94,307 87,569 $ 78,554 $ 75,596 $ 74,006
Commercial and Industrial Total Energy Loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 10,389 10,256 9,992 11,485 14,218 17,814
Commercial Real Estate Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 140,923 143,177 143,205 140,020 138,224 130,598
Total consumer real estate loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 21,707 18,924 19,106 15,707 13,857 13,538
Consumer Loan [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 9,300 8,824 10,279 10,541 8,402 10,040
Loans Receivable [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 277,803 $ 275,488 270,151 $ 256,307 $ 250,297 $ 245,996
Modeled Expected Credit Losses [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 104,969   97,926      
Modeled Expected Credit Losses [Member] | Commercial Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 56,406   51,669      
Modeled Expected Credit Losses [Member] | Commercial and Industrial Total Energy Loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 4,388   3,969      
Modeled Expected Credit Losses [Member] | Commercial Real Estate Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 17,656   17,549      
Modeled Expected Credit Losses [Member] | Total consumer real estate loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 20,312   17,720      
Modeled Expected Credit Losses [Member] | Consumer Loan [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 6,207   7,019      
Q-factor adjustments [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 152,895   154,704      
Q-factor adjustments [Member] | Commercial Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 23,735   22,635      
Q-factor adjustments [Member] | Commercial and Industrial Total Energy Loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 3,324   3,323      
Q-factor adjustments [Member] | Commercial Real Estate Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 122,032   125,031      
Q-factor adjustments [Member] | Total consumer real estate loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 711   620      
Q-factor adjustments [Member] | Consumer Loan [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 3,093   3,095      
Specific Valuation Allowances [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 19,939   17,521      
Specific Valuation Allowances [Member] | Commercial Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 15,343   13,265      
Specific Valuation Allowances [Member] | Commercial and Industrial Total Energy Loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 2,677   2,700      
Specific Valuation Allowances [Member] | Commercial Real Estate Portfolio Segment [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 1,235   625      
Specific Valuation Allowances [Member] | Total consumer real estate loans [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest 684   766      
Specific Valuation Allowances [Member] | Consumer Loan [Member]            
Financing Receivable, Allowance for Credit Loss [Line Items]            
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest $ 0   $ 165