XML 72 R57.htm IDEA: XBRL DOCUMENT v3.21.1
Loans and Allowance for Credit Losses - Additional Information (Detail)
 3 Months Ended
Mar. 31, 2021
USD ($)
application
portfolio
segment
loan
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
application
Financing Receivable, Allowance for Credit Losses [Line Items]      
Number of loan portfolios | portfolio 4    
Number of loan segments | segment 7    
Total loans $ 13,925,261,000   $ 13,786,479,000
Accrued interest receivable, loans $ 53,700,000   57,300,000
Loan placed on nonaccrual when past due, number of days 90 days    
Loan participations $ 1,108,000,000    
Loan participations sold 496,300,000    
Loan participations retained $ 611,800,000    
TDR term 6 months    
Minimum number of days for loan charge off to be recorded 120 days    
Maximum number of days for loan charge off to be recorded 180 days    
Financing receivable TDRs included with non-accrual loans $ 14,300,000   14,900,000
Financing receivable TDR specific reserves $ 800,000   $ 1,600,000
Financing receivable, TDR, number of loans qualified for removal | loan 1    
Charge-offs $ (15,000) $ 1,961,000  
Number of days for a loan to be considered to be in payment default 90 days    
Troubled Debt Restructurings During Period      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Charge-offs $ 0 0  
Commercial      
Financing Receivable, Allowance for Credit Losses [Line Items]      
PPP, number of applications processed and approved (over) | application 4,800   9,700
PPP, amount of funding $ 517,300,000   $ 1,500,000,000
Total loans 4,068,896,000   3,956,422,000
Charge-offs 0 695,000  
Commercial | PPP Loans      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Total loans 1,124,000,000   943,000,000.0
Commercial real estate      
Financing Receivable, Allowance for Credit Losses [Line Items]      
Total loans $ 6,074,135,000   $ 5,946,512,000
Percentage of risk-based capital 226.00%    
Regulatory guideline limit 300.00%    
Charge-offs $ (8,000) $ 1,272,000