XML 76 R58.htm IDEA: XBRL DOCUMENT v3.20.4
Significant Accounting Policies - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Financing Receivable, Impaired [Line Items]        
Date of discontinued recognition of interest on mortgage and commercial loans   90 days    
Consumer and other retail loan due date   120 days    
Interest receivable $ 33,679,000 $ 56,459,000 $ 33,679,000  
Minimum duration for past due residential loans to be considered as nonperforming   90 days    
Impairment of company's goodwill   $ 0 $ 0 $ 0
Lock in period for interest rates   45 days    
Remaining purchase discount on loans (50,958,000)      
Cumulative Effect, Period of Adoption, Adjustment        
Financing Receivable, Impaired [Line Items]        
Remaining purchase discount on loans $ 5,469,000      
Minimum        
Financing Receivable, Impaired [Line Items]        
Renewal term   1 year    
Minimum | Lease financing        
Financing Receivable, Impaired [Line Items]        
Maturity term   2 years    
Minimum | Residential | Real estate - construction        
Financing Receivable, Impaired [Line Items]        
Maturity term   6 months    
Minimum | Commercial | Real estate - construction        
Financing Receivable, Impaired [Line Items]        
Maturity term   24 months    
Maximum        
Financing Receivable, Impaired [Line Items]        
Renewal term   20 years    
Maximum | Lease financing        
Financing Receivable, Impaired [Line Items]        
Maturity term   5 years    
Maximum | Residential | Real estate - construction        
Financing Receivable, Impaired [Line Items]        
Maturity term   12 months    
Maximum | Commercial | Real estate - construction        
Financing Receivable, Impaired [Line Items]        
Maturity term   36 months    
Premises        
Financing Receivable, Impaired [Line Items]        
Estimated life (in years)   40 years    
Furniture and equipment | Minimum        
Financing Receivable, Impaired [Line Items]        
Estimated life (in years)   3 years    
Furniture and equipment | Maximum        
Financing Receivable, Impaired [Line Items]        
Estimated life (in years)   7 years    
Computer equipment | Minimum        
Financing Receivable, Impaired [Line Items]        
Estimated life (in years)   3 years    
Computer equipment | Maximum        
Financing Receivable, Impaired [Line Items]        
Estimated life (in years)   5 years