Annual report [Section 13 and 15(d), not S-K Item 405]

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, 2024
Dec. 31, 2023
Cash and cash equivalents $ 116,394 $ 123,430
Debt Securities, Held-to-Maturity, Fair Value 639,496 907,191
Federal funds sold 1,045 100,575
Mortgage loans held for sale 9,211 5,074
Restricted equity securities 11,300 10,226
Loans, net 12,441,378 11,505,512
Federal funds purchased 1,993,728 1,256,724
Reported Value Measurement [Member]    
Cash and cash equivalents 2,375,589 2,030,513
Federal funds sold 1,045 100,575
Mortgage loans held for sale 9,211 5,071
Restricted equity securities 11,300 10,226
Loans, net 12,441,378 11,505,512
Deposits 13,543,459 13,273,511
Federal funds purchased 1,993,728 1,256,724
Other borrowings 64,743 64,735
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Debt Securities, Held-to-Maturity, Fair Value 249,403 508,985
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Debt Securities, Held-to-Maturity, Fair Value 465,200 473,679
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Debt Securities, Held-to-Maturity, Fair Value 250 250
Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents 2,375,589 2,030,513
Federal funds sold 1,045 100,575
Mortgage loans held for sale 9,211 5,071
Restricted equity securities 11,300 10,226
Loans, net 12,013,721 11,032,819
Deposits 13,540,438 13,266,640
Federal funds purchased 1,993,728 1,256,724
Other borrowings 59,130 58,083
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents 2,375,589 2,030,513
Debt Securities, Held-to-Maturity, Fair Value 229,771 484,267
Federal funds sold 0 0
Mortgage loans held for sale 0 0
Restricted equity securities 0 0
Loans, net 0 0
Deposits 0 0
Federal funds purchased 0 0
Other borrowings 0 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Cash and cash equivalents 0 0
Debt Securities, Held-to-Maturity, Fair Value 409,475 422,924
Federal funds sold 1,045 100,575
Mortgage loans held for sale 9,211 5,071
Restricted equity securities 11,300 10,226
Loans, net 0 0
Deposits 13,540,438 13,266,640
Federal funds purchased 1,993,728 1,256,724
Other borrowings 59,130 58,083
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents 0 0
Debt Securities, Held-to-Maturity, Fair Value 250 250
Federal funds sold 0 0
Mortgage loans held for sale 0 0
Restricted equity securities 0 0
Loans, net 12,013,721 11,032,819
Deposits 0 0
Federal funds purchased 0 0
Other borrowings $ 0 $ 0