Annual report pursuant to Section 13 and 15(d)

Note 3 - Loans (Details Textual)

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Note 3 - Loans (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Termination of Loan Guaratee, Close-out Payment $ 7,400    
Percentage of Fee on Commitment Balance   1.00%  
Loans and Leases Receivable, Net Amount, Total   $ 7,184,867 $ 6,464,899
Financing Receivable, Troubled Debt Restructuring   3,400 14,600
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down   900 $ 4,300
Commercial Portfolio Segment [Member]      
Financing Receivable, Troubled Debt Restructuring   $ 300  
Loans Formerly Enrolled In Loan Guarantee Program [Member]      
Number of Loans Outstanding   71  
Loans and Leases Receivable, Net Amount, Total   $ 42,200  
Loans Formerly Enrolled In Loan Guarantee Program [Member] | Pass [Member]      
Loans and Leases Receivable, Net Amount, Total   37,000  
Loans Formerly Enrolled In Loan Guarantee Program [Member] | Special Mention [Member]      
Loans and Leases Receivable, Net Amount, Total   $ 5,200