Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Securities - Investment Securities Continuous Unrealized Loss Position (Details)

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Note 4 - Securities - Investment Securities Continuous Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt securities available for sale, less than twelve months, gross unrealized losses $ (32,664) $ (3,393)
Debt securities available for sale, less than twelve months, fair value 606,400 370,172
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (2,724) (9)
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 23,751 228
Debt Securities, Available for Sale, Gross Unrealized Losses (35,388) (3,402)
Debt Securities, Available for Sale, Fair Value 630,151 370,400
Debt Securities held to maturity less than twelve months, gross unrealized losses (58,333) (1,950)
Debt securities, held to maturity, Less Than Twelve Months, Fair Value 971,794 258,372
Debt Securities Held To Maturity, Twelve Months or More, Gross Unrealized Losses (3,639) 0
U.S. Treasury Securities 21,918 0
Debt Securities, Held To Maturity , Gross Unrealized Losses (61,971) (1,949)
Debt Securities,Held To Maturity, Fair Value 993,712 258,372
US Treasury Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses (38)  
Debt securities available for sale, less than twelve months, fair value 5,966  
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses 0  
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 0  
Debt Securities, Available for Sale, Gross Unrealized Losses (38)  
Debt Securities, Available for Sale, Fair Value 5,966  
Debt Securities held to maturity less than twelve months, gross unrealized losses (22,750) (668)
Debt securities, held to maturity, Less Than Twelve Months, Fair Value 483,496 123,698
Debt Securities Held To Maturity, Twelve Months or More, Gross Unrealized Losses 0 0
U.S. Treasury Securities 0 0
Debt Securities, Held To Maturity , Gross Unrealized Losses (22,750) (668)
Debt Securities,Held To Maturity, Fair Value 483,496 123,698
Collateralized Mortgage-Backed Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses (20,147) (2,685)
Debt securities available for sale, less than twelve months, fair value 261,595 303,297
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (2,501) 0
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 22,005 0
Debt Securities, Available for Sale, Gross Unrealized Losses (22,648) (2,685)
Debt Securities, Available for Sale, Fair Value 283,600 303,297
Debt Securities held to maturity less than twelve months, gross unrealized losses (34,900) (1,271)
Debt securities, held to maturity, Less Than Twelve Months, Fair Value 481,201 134,192
Debt Securities Held To Maturity, Twelve Months or More, Gross Unrealized Losses (3,639) 0
U.S. Treasury Securities 21,918 0
Debt Securities, Held To Maturity , Gross Unrealized Losses (38,538) (1,271)
Debt Securities,Held To Maturity, Fair Value 503,119 134,192
US States and Political Subdivisions Debt Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses (1,112) (61)
Debt securities available for sale, less than twelve months, fair value 11,613 5,198
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (59) (9)
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 410 228
Debt Securities, Available for Sale, Gross Unrealized Losses (1,171) (70)
Debt Securities, Available for Sale, Fair Value 12,023 5,426
Debt Securities held to maturity less than twelve months, gross unrealized losses (683) (10)
Debt securities, held to maturity, Less Than Twelve Months, Fair Value 7,097 482
Debt Securities Held To Maturity, Twelve Months or More, Gross Unrealized Losses 0 0
U.S. Treasury Securities 0 0
Debt Securities, Held To Maturity , Gross Unrealized Losses (683) (10)
Debt Securities,Held To Maturity, Fair Value 7,097 482
Corporate Debt Securities [Member]    
Debt securities available for sale, less than twelve months, gross unrealized losses (11,366) (647)
Debt securities available for sale, less than twelve months, fair value 327,226 61,677
Debt Securities Available for Sale, Twelve Months or More, Gross Unrealized Losses (165) 0
Debt Securities, Available for Sale, Twelve Months or More, Fair Value 1,335 0
Debt Securities, Available for Sale, Gross Unrealized Losses (11,531) (647)
Debt Securities, Available for Sale, Fair Value $ 328,561 $ 61,677