Quarterly report [Sections 13 or 15(d)]

Note 12 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details)

v3.25.2
Note 12 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Cash and cash equivalents $ 140,659 $ 116,394 [1]
Held to maturity debt securities, fair value 630,105 639,496
Federal funds sold 6,000 1,045 [1]
Mortgage loans held for sale 22,131 9,211 [1]
Restricted equity securities 12,156 11,300 [1]
Federal funds purchased 1,599,135 1,993,728 [1]
Reported Value Measurement [Member]    
Cash and cash equivalents 1,704,904 2,375,589
Federal funds sold 6,000 1,045
Mortgage loans held for sale 22,131 9,211
Restricted equity securities 12,156 11,300
Loans, net 13,062,601 12,441,378
Deposits 13,862,319 13,543,459
Federal funds purchased 1,599,135 1,993,728
Other borrowings 64,747 64,743
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Held to maturity debt securities, fair value 249,511 249,403
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Held to maturity debt securities, fair value 436,641 465,200
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Held to maturity debt securities, fair value 500 250
Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents 1,704,904 2,375,589
Federal funds sold 6,000 1,045
Mortgage loans held for sale 22,131 9,211
Restricted equity securities 12,156 11,300
Loans, net 12,776,566 12,013,721
Deposits 13,860,040 13,540,438
Federal funds purchased 1,599,135 1,993,728
Other borrowings 59,669 59,130
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents 1,704,904 2,375,589
Held to maturity debt securities, fair value 236,162 229,771
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
Held to maturity debt securities, fair value 393,443 409,475
Federal funds sold 6,000 1,045
Mortgage loans held for sale 22,131 9,211
Restricted equity securities 12,156 11,300
Loans, net 0 0
Deposits 13,860,040 13,540,438
Federal funds purchased 1,599,135 1,993,728
Other borrowings 59,669 59,130
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents 0 0
Held to maturity debt securities, fair value 500 250
Federal funds sold 0 0
Mortgage loans held for sale 0 0
Restricted equity securities 0 0
Loans, net 12,776,566 12,013,721
Deposits 0 0
Federal funds purchased 0 0
Other borrowings $ 0 $ 0
[1] Derived from audited financial statements.