v3.22.4
Loans (Allowance for Credit Loss By Loan Class Calculated in Accordance With CECL Methodology) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss $ 227,621 $ 248,666    
Commercial Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 104,237 72,091 $ 73,843 $ 51,593
Commercial and Industrial Total Energy Loans [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 18,062 17,217 39,553 37,382
Commercial Real Estate Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 90,301 144,936 134,892 31,037
Total consumer real estate loans [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 8,004 6,585 7,926 4,113
Consumer Loan [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 7,017 7,837 6,963 8,042
Loans Receivable [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 227,621 248,666 $ 263,177 $ 132,167
Modeled Expected Credit Losses [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 110,292 82,866    
Modeled Expected Credit Losses [Member] | Commercial Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 61,918 46,946    
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 8,531 6,363    
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 27,013 16,676    
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 7,847 6,484    
Modeled Expected Credit Losses [Member] | Consumer Loan [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 4,983 6,397    
Q-factor adjustments [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 105,148 149,348    
Q-factor adjustments [Member] | Commercial Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 36,237 14,609    
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 5,148 5,374    
Q-factor adjustments [Member] | Commercial Real Estate Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 61,572 127,860    
Q-factor adjustments [Member] | Total consumer real estate loans [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 157 65    
Q-factor adjustments [Member] | Consumer Loan [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 2,034 1,440    
Specific Valuation Allowances [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 12,181 16,452    
Specific Valuation Allowances [Member] | Commercial Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 6,082 10,536    
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 4,383 5,480    
Specific Valuation Allowances [Member] | Commercial Real Estate Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 1,716 400    
Specific Valuation Allowances [Member] | Total consumer real estate loans [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss 0 36    
Specific Valuation Allowances [Member] | Consumer Loan [Member]        
Financing Receivable, Allowance for Credit Loss [Line Items]        
Financing Receivable, Allowance for Credit Loss $ 0 $ 0