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)

v3.23.1
Note 11 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Cash and cash equivalents $ 139,175,000 $ 106,317,000 [1]
Held to maturity debt securities, fair value 937,961,000 935,953,000 [1]
Federal funds sold 6,478,000 1,515,000 [1]
Held to maturity debt securities, fair value 937,961,000 935,953,000 [1]
Mortgage loans held for sale 1,651,000 1,607,000 [1]
Restricted equity securities 7,307,000 7,734,000 [1]
Loans, net 11,480,837,000 11,541,671,000 [1]
Federal funds purchased 1,480,160,000 1,618,798,000 [1]
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member]    
Cash and cash equivalents 864,493,000 814,538,000
Held to maturity debt securities, fair value 507,601,000 507,601,000
Held to maturity debt securities, fair value 507,601,000 507,601,000
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents 864,493,000 814,538,000
Held to maturity debt securities, fair value 477,580,000 470,954,000
Held to maturity debt securities, fair value 477,580,000 470,954,000
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member]    
Held to maturity debt securities, fair value 506,342,000 526,720,000
Federal funds sold 6,478,000 1,515,000
Held to maturity debt securities, fair value 506,342,000 526,720,000
Mortgage loans held for sale 1,651,000 1,607,000
Restricted equity securities 7,307,000 7,734,000
Deposits 11,615,317,000 11,546,805,000
Federal funds purchased 1,480,160,000 1,618,798,000
Other borrowings 65,417 64,726
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]    
Held to maturity debt securities, fair value 453,162,000 464,749,000
Federal funds sold 6,478,000 1,515,000
Held to maturity debt securities, fair value 453,162,000 464,749,000
Mortgage loans held for sale 1,642,000 1,604,000
Restricted equity securities 7,307,000 7,734,000
Deposits 11,602,610,000 11,529,647,000
Federal funds purchased 1,480,160,000 1,618,798,000
Other borrowings 57,340 57,101
Fair Value, Inputs, Level 3 [Member]    
Held to maturity debt securities, fair value 250,000 250,000
Held to maturity debt securities, fair value 250,000 250,000
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member]    
Loans, net 11,480,837,000 11,541,671,000
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]    
Loans, net $ 11,145,529,000 $ 11,265,517,000
[1] derived from audited financial statements.