Annual report pursuant to Section 13 and 15(d)

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, 2022
Dec. 31, 2021
Cash and cash equivalents $ 106,317 $ 56,934 [1]
Held to maturity debt securities, fair value 935,953 466,286 [1]
Federal funds sold 1,515 58,372 [1]
Mortgage loans held for sale 1,607 1,114 [1]
Restricted equity securities 7,734 7,311 [1]
Loans, net 11,541,671 9,416,274 [1]
Federal funds purchased 1,618,798 1,711,777 [1]
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member]    
Cash and cash equivalents 814,538 4,163,724
Held to maturity debt securities, fair value 507,151 149,263
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]    
Cash and cash equivalents 814,538 4,163,724
Held to maturity debt securities, fair value 470,954 148,620
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member]    
Held to maturity debt securities, fair value 526,720 313,444
Federal funds sold 1,515 58,372
Mortgage loans held for sale 1,607 1,114
Restricted equity securities 7,734 7,311
Deposits 11,546,805 12,452,836
Federal funds purchased 1,618,798 1,711,777
Other borrowings 64,726 64,706
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]    
Held to maturity debt securities, fair value 464,749 317,416
Federal funds sold 1,515 58,372
Mortgage loans held for sale 1,604 1,111
Restricted equity securities 7,734 7,311
Deposits 11,529,647 12,454,140
Federal funds purchased 1,618,798 1,711,777
Other borrowings 57,101 65,475
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member]    
Held to maturity debt securities, fair value 250 250
Loans, net 11,541,671 9,416,274
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]    
Held to maturity debt securities, fair value 250 250
Loans, net $ 11,265,517 $ 9,403,012
[1] derived from audited financial statements.