Annual report pursuant to Section 13 and 15(d)

Note 21 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details)

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Note 21 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Cash and due from banks $ 93,655 $ 78,618
Federal funds sold 1,771 100,473
Mortgage loans held for sale 14,425 6,312
Debt securities held to maturity 886,688 759,399
Loans and Leases Receivable, Net Amount, Total 8,377,746 7,184,867
Federal funds purchased 851,545 470,749
Reported Value Measurement [Member]    
Debt securities held to maturity 250 250
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 2,209,640 530,127
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Federal funds sold 1,771 100,473
Mortgage loans held for sale 14,425 6,312
Deposits 9,975,724 7,530,433
Federal funds purchased 851,545 470,749
Other borrowings 64,748 64,703
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Loans and Leases Receivable, Net Amount, Total 8,377,746 7,184,867
Estimate of Fair Value Measurement [Member]    
Debt securities held to maturity 250 250
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and due from banks 2,209,640 530,127
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Federal funds sold 1,771 100,473
Mortgage loans held for sale 14,497 6,322
Deposits 9,987,665 7,534,984
Federal funds purchased 851,545 470,749
Other borrowings 65,560 65,048
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Loans and Leases Receivable, Net Amount, Total $ 8,387,718 $ 7,132,542