Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details)

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Note 11 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Cash and due from banks $ 70,472 $ 78,618 [1]
Federal funds sold 1,302 100,473 [1]
Mortgage loans held for sale 21,472 6,312 [1]
Held to maturity debt securities 250 250 [1]
Net Loans 8,416,114 7,184,867 [1]
Federal funds purchased 669,350 470,749 [1]
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 1,622,069 530,127
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Federal funds sold 1,302 100,473
Mortgage loans held for sale 21,472 6,302
Deposits 9,673,783 7,530,433
Federal funds purchased 669,350 470,749
Other borrowings 64,719 64,703
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Held to maturity debt securities 250 250
Net Loans 8,331,951 7,151,523
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 1,622,069 530,127
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Federal funds sold 1,302 100,473
Mortgage loans held for sale 22,244 6,312
Deposits 9,687,830 7,534,984
Federal funds purchased 669,350 470,749
Other borrowings 63,840 65,048
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Held to maturity debt securities 250 250
Net Loans $ 8,232,972 $ 7,099,198
[1] Derived from audited financial statements.