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, 2023
Dec. 31, 2022
Cash and cash equivalents $ 123,430 $ 106,317 [1]
Held to maturity debt securities, fair value 907,191 935,953
Federal funds sold 100,575 1,515 [1]
Mortgage loans held for sale 5,074 1,607 [1]
Restricted equity securities 10,226 7,734 [1]
Loans, net 11,505,512 11,541,671 [1]
Federal funds purchased 1,256,724 1,618,798 [1]
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member]    
Cash and cash equivalents 2,030,513 814,538
Held to maturity debt securities, fair value 508,985 507,151
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents 2,030,513 814,538
Held to maturity debt securities, fair value 484,267 470,954
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member]    
Held to maturity debt securities, fair value 473,429 526,720
Federal funds sold 100,575 1,515
Mortgage loans held for sale 5,071 1,607
Restricted equity securities 10,226 7,734
Deposits 13,273,511 11,546,805
Federal funds purchased 1,256,724 1,618,798
Other borrowings 64,735 64,726
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]    
Held to maturity debt securities, fair value 422,674 464,749
Federal funds sold 100,575 1,515
Mortgage loans held for sale 5,071 1,604
Restricted equity securities 10,226 7,734
Deposits 13,266,640 11,529,647
Federal funds purchased 1,256,724 1,618,798
Other borrowings 58,083 57,101
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member]    
Held to maturity debt securities, fair value 250 250
Loans, net 11,505,512 11,541,671
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]    
Held to maturity debt securities, fair value 250 250
Loans, net $ 11,032,819 $ 11,265,517
[1] derived from audited financial statements.