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)

v3.25.1
Note 12 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2025
Dec. 31, 2024
Cash and cash equivalents $ 121,645 $ 116,394
Held to maturity debt securities, fair value 639,455 639,496
Federal funds sold 9,322 1,045
Mortgage loans held for sale 11,386 9,211
Restricted equity securities 12,156 11,300
Net Loans 12,721,797 12,441,378
Federal funds purchased 2,358,326 1,993,728
Reported Value Measurement [Member]    
Cash and cash equivalents 3,340,398 2,375,589
Federal funds sold 9,322 1,045
Mortgage loans held for sale 11,386 9,211
Restricted equity securities 12,156 11,300
Net Loans 12,721,797 12,441,378
Deposits 14,429,061 13,543,459
Federal funds purchased 2,358,326 1,993,728
Other borrowings 64,745 64,743
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Held to maturity debt securities, fair value 249,457 249,403
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]    
Held to maturity debt securities, fair value 452,006 465,200
Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]    
Held to maturity debt securities, fair value 250 250
Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents 3,340,398 2,375,589
Federal funds sold 9,322 1,045
Mortgage loans held for sale 11,386 9,211
Restricted equity securities 12,156 11,300
Net Loans 12,415,164 12,013,721
Deposits 14,427,026 13,540,438
Federal funds purchased 2,358,326 1,993,728
Other borrowings 59,398 59,130
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]    
Cash and cash equivalents 3,340,398 2,375,589
Held to maturity debt securities, fair value 233,692 229,771
Federal funds sold 0 0
Mortgage loans held for sale 0 0
Restricted equity securities 0 0
Net Loans 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 405,513 409,475
Federal funds sold 9,322 1,045
Mortgage loans held for sale 11,386 9,211
Restricted equity securities 12,156 11,300
Net Loans 0 0
Deposits 14,427,026 13,540,438
Federal funds purchased 2,358,326 1,993,728
Other borrowings 59,398 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 250 250
Federal funds sold 0 0
Mortgage loans held for sale 0 0
Restricted equity securities 0 0
Net Loans 12,415,164 12,013,721
Deposits 0 0
Federal funds purchased 0 0
Other borrowings $ 0 $ 0