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
Jun. 30, 2024
Dec. 31, 2023
Cash and cash equivalents $ 135,711 $ 123,430
Held to maturity debt securities, fair value 684,234 907,191
Federal funds sold 11,132 100,575
Mortgage loans held for sale 11,174 5,074
Restricted equity securities 11,300 10,226
Net Loans 12,174,688 11,505,512
Federal funds purchased 1,097,154 1,256,724
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member]    
Cash and cash equivalents 1,265,633 2,030,513
Held to maturity debt securities, fair value 274,270 508,985
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents 1,265,633 2,030,513
Held to maturity debt securities, fair value 250,338 484,267
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member]    
Held to maturity debt securities, fair value 492,735 473,429
Federal funds sold 11,132 100,575
Mortgage loans held for sale 11,174 5,071
Restricted equity securities 11,300 10,226
Deposits 13,259,392 13,273,511
Federal funds purchased 1,097,154 1,256,724
Other borrowings 64,739 64,735
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]    
Held to maturity debt securities, fair value 433,646 422,674
Federal funds sold 11,132 100,575
Mortgage loans held for sale 11,174 5,071
Restricted equity securities 11,300 10,226
Deposits 13,252,073 13,266,640
Federal funds purchased 1,097,154 1,256,724
Other borrowings 58,595 58,083
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member]    
Held to maturity debt securities, fair value 250 250
Net Loans 12,174,688 11,505,512
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]    
Held to maturity debt securities, fair value 250 250
Net Loans $ 11,736,227 $ 11,032,819