Annual report pursuant to Section 13 and 15(d)

Note 3 - Loans (Details Textual)

v3.20.4
Note 3 - Loans (Details Textual)
3 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Number of Loans Funded, Payroll Protection Plan   4,900  
Amount of Loans Funded, Payment Protection Plan   $ 1,050,000,000.00  
Loans and Leases Receivable, Gross, Total   $ 8,465,688,000 $ 7,261,451,000
Termination of Loan Guaratee, Close-out Payment $ 7,400,000    
Percentage of Fee on Commitment Balance   1.00%  
Loans and Leases Receivable, Net Amount, Total   $ 8,377,746,000 7,184,867,000
Allowance for Loan and Lease Losses, Unfunded Commitments   2,200,000 500,000
Interest Earned on Nonaccrual Loans   $ 0 0
Financing Receivable, Number of Payment Deferrals   15  
Financing Receivable, Payment Deferral, Recorded Investment   $ 2,800,000  
Financing Receivable, Troubled Debt Restructuring   1,500,000 3,400,000
Pass [Member]      
Loans and Leases Receivable, Gross, Total   8,334,279,000 7,137,760,000
Special Mention [Member]      
Loans and Leases Receivable, Gross, Total   42,902,000 81,952,000
Substandard [Member]      
Loans and Leases Receivable, Gross, Total   $ 88,507,000 $ 41,739,000
Loans Formerly Enrolled In Loan Guarantee Program [Member]      
Number of Loans Outstanding   55 71
Loans and Leases Receivable, Net Amount, Total   $ 37,200,000 $ 42,200,000
Loans Formerly Enrolled In Loan Guarantee Program [Member] | Pass [Member]      
Loans and Leases Receivable, Net Amount, Total   29,700,000 37,000,000.0
Loans Formerly Enrolled In Loan Guarantee Program [Member] | Special Mention [Member]      
Loans and Leases Receivable, Net Amount, Total   6,500,000 5,200,000
Loans Formerly Enrolled In Loan Guarantee Program [Member] | Substandard [Member]      
Loans and Leases Receivable, Net Amount, Total   1,000,000.0  
Commercial Real Estate Portfolio Segment [Member]      
Loans and Leases Receivable, Gross, Total   3,295,900,000 2,696,210,000
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]      
Loans and Leases Receivable, Gross, Total   3,207,492,000 2,629,487,000
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]      
Loans and Leases Receivable, Gross, Total   19,610,000 46,176,000
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]      
Loans and Leases Receivable, Gross, Total   68,798,000 $ 20,547,000
Loans Excluding PPP Loans [Member]      
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total   17,800,000  
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums During Period   14,100,000  
PPP Loans [Member] | Commercial Real Estate Portfolio Segment [Member]      
Loans and Leases Receivable, Gross, Total   $ 900,500,000