Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Fair Value Measurement - Financial Assets and Financial Liabilities Carried at Fair Value on a Recurring Basis (Details)

v3.23.3
Note 11 - Fair Value Measurement - Financial Assets and Financial Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Available for sale, fair value $ 834,802 $ 644,815 [1]
US Treasury Securities [Member]    
Available for sale, fair value 280,718 2,969
Collateralized Mortgage-Backed Securities [Member]    
Available for sale, fair value 215,241 249,703
US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 11,193 13,609
Corporate Debt Securities [Member]    
Available for sale, fair value 327,650 378,525
US Government Agencies Debt Securities [Member]    
Available for sale, fair value 9  
Fair Value, Recurring [Member]    
Available for sale, fair value 834,802 644,815
Total assets at fair value 834,802 649,016
Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Interest rate cap derivative   4,201
Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Available for sale, fair value 280,718 2,969
Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member]    
Available for sale, fair value 215,241 249,703
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 11,193 13,609
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]    
Available for sale, fair value 327,650 378,525
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]    
Available for sale, fair value   9
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Available for sale, fair value 280,718 2,969
Total assets at fair value 280,718 2,969
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Interest rate cap derivative   0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Available for sale, fair value 280,718 2,969
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member]    
Available for sale, fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]    
Available for sale, fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]    
Available for sale, fair value   0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]    
Available for sale, fair value 547,224 630,986
Total assets at fair value 547,224 635,187
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Interest rate cap derivative   4,201
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Available for sale, fair value 0 0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member]    
Available for sale, fair value 215,241 249,703
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 11,193 13,609
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]    
Available for sale, fair value 320,790 367,665
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]    
Available for sale, fair value   9
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Available for sale, fair value 6,860 10,860
Total assets at fair value 6,860 10,860
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Interest rate cap derivative   0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Available for sale, fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Collateralized Mortgage-Backed Securities [Member]    
Available for sale, fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]    
Available for sale, fair value $ 6,860 10,860
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]    
Available for sale, fair value   $ 0
[1] derived from audited financial statements.