XML 47 R37.htm IDEA: XBRL DOCUMENT v3.22.2
Loans and Allowance for Loan Losses (Narrative) (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2022
USD ($)
contract
Jun. 30, 2021
USD ($)
contract
Jun. 30, 2022
USD ($)
contract
Jun. 30, 2021
USD ($)
contract
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Loans and leases receivable, impaired, interest lost on nonaccrual loans $ 2,000,000 $ 2,700,000 $ 5,400,000 $ 6,200,000        
Interest income, cash basis method 410,000 575,000 964,000 1,200,000        
Total loans 41,204,780,000   41,204,780,000     $ 39,311,958,000    
Allowance for loan losses 407,837,000 516,708,000 407,837,000 516,708,000 $ 414,956,000 427,597,000 $ 563,214,000 $ 605,736,000
Reserve for unfunded commitments 50,600,000   50,600,000     41,900,000    
All financing receivable, allowance for credit loss $ 458,400,000   458,400,000     $ 469,500,000    
Allowance for credit loss, decrease     $ (11,100,000)          
ACL to loans ratio 1.11%   1.11%          
Decrease in ACL to loans ratio     0.0008          
Allowance for credit loss, reasonable and supportable forecast period     2 years          
Allowance for credit loss, straight-line basis historical period     1 year          
Downside bias 60.00%   60.00%     43.00%    
Provision for (reversal of) credit losses $ 12,688,000 (24,598,000) $ 24,088,000 (43,173,000)        
Net chargeoff amount 16,600,000   35,200,000          
Financing receivable, allowance for credit loss, period increase (decrease) from increase in size of loan profile 3,700,000   7,500,000          
Financing receivable, purchase 180,200,000   361,600,000          
Recorded investment 37,282,000 $ 6,801,000 78,925,000 $ 22,276,000        
Commitments to land additional funds to TDRs $ 0   $ 0     $ 0    
Troubled Debt Restructuring That Subsequently Defaults                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Number of contracts | contract 3 5 3 5        
Recorded investment $ 430,000 $ 172,000 $ 430,000 $ 172,000        
Baseline                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Projected unemployment rate 3.60%   3.60%     4.00%    
Baseline | Minimum                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Projected unemployment rate           3.50%    
Downside                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Projected unemployment rate 5.20%   5.20%          
Substandard                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Retail loan substandard period (in days)     90 days          
Loss                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Retail loan charge off (in days)     120 days          
Total commercial and industrial                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total loans $ 20,778,325,000   $ 20,778,325,000     $ 19,622,924,000    
Recorded investment 31,230,000 $ 4,099,000 59,632,000 $ 11,548,000        
Total commercial and industrial | Small Business Administration (SBA), CARES Act, Paycheck Protection Program                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total loans 86,700,000   86,700,000          
Asset Pledged as Collateral                
Accounts, Notes, Loans and Financing Receivable [Line Items]                
Total loans $ 15,150,000,000   $ 15,150,000,000     $ 14,190,000,000