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)

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Note 11 - Fair Value Measurement - Financial Assets and Liabilities Carried at Fair Value on Recurring Basis or Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Cash and due from banks $ 252,638 $ 56,934 [1]
Federal funds sold 101,447 58,372 [1]
Held to maturity debt securities, fair value 1,003,840 466,286 [1]
Mortgage loans held for sale 3,451 1,114 [1]
Loans, net 10,488,933 9,416,274 [1]
Federal funds purchased 1,389,167 1,711,777 [1]
Fair Value, Inputs, Level 1 [Member] | Reported Value Measurement [Member]    
Cash and due from banks 1,587,149 4,163,724
Fair Value, Inputs, Level 1 [Member] | Estimate of Fair Value Measurement [Member]    
Cash and due from banks 1,587,149 4,163,724
Fair Value, Inputs, Level 2 [Member] | Reported Value Measurement [Member]    
Federal funds sold 101,447 58,372
Held to maturity debt securities, fair value 1,065,505 462,707
Mortgage loans held for sale 3,451 1,114
Deposits 11,772,337 12,452,836
Federal funds purchased 1,389,167 1,711,777
Other borrowings 64,716 64,706
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member]    
Federal funds sold 101,447 58,372
Held to maturity debt securities, fair value 1,003,590 466,036
Mortgage loans held for sale 3,390 1,111
Deposits 11,777,719 12,454,140
Federal funds purchased 1,389,167 1,711,777
Other borrowings 65,457 65,476
Fair Value, Inputs, Level 3 [Member]    
Held to maturity debt securities, fair value 250 250
Fair Value, Inputs, Level 3 [Member] | Reported Value Measurement [Member]    
Loans, net 10,432,260 9,416,274
Fair Value, Inputs, Level 3 [Member] | Estimate of Fair Value Measurement [Member]    
Loans, net $ 10,432,260 $ 9,403,012
[1] derived from audited financial statements.