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)

v3.21.2
Note 11 - Fair Value Measurement - Financial Assets and Financial Liabilities Carried at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Available for sale, fair value $ 1,013,533 $ 886,688 [1]
US Treasury Securities [Member]    
Available for sale, fair value 14,235 14,357
US Government Agencies Debt Securities [Member]    
Available for sale, fair value 12,139 15,458
Collateralized Mortgage Backed Securities [Member]    
Available for sale, fair value 599,092 495,109
US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 26,281 38,115
Corporate Debt Securities [Member]    
Available for sale, fair value 361,786 323,649
Fair Value, Recurring [Member]    
Available for sale, fair value 1,013,533 886,688
Interest rate cap derivative   139
Total assets at fair value 1,013,945 886,827
Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Interest rate cap derivative 412  
Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Available for sale, fair value 14,235 14,357
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]    
Available for sale, fair value 12,139 15,458
Fair Value, Recurring [Member] | Collateralized Mortgage Backed Securities [Member]    
Available for sale, fair value 599,092 495,109
Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 26,281 38,115
Fair Value, Recurring [Member] | Corporate Debt Securities [Member]    
Available for sale, fair value 361,786 323,649
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]    
Available for sale, fair value 0  
Total assets at fair value 0 0
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 0 0
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]    
Available for sale, fair value 0 0
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 2 [Member] | Fair Value, Recurring [Member]    
Available for sale, fair value 998,539 886,688
Interest rate cap derivative   139
Total assets at fair value 998,951 886,827
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Interest rate cap derivative 412  
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Treasury Securities [Member]    
Available for sale, fair value 14,235 14,357
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member]    
Available for sale, fair value 12,139 15,458
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Collateralized Mortgage Backed Securities [Member]    
Available for sale, fair value 599,092 495,109
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]    
Available for sale, fair value 26,281 38,115
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Corporate Debt Securities [Member]    
Available for sale, fair value 346,792 323,649
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]    
Available for sale, fair value 14,994  
Total assets at fair value 14,994 0
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] | US Government Agencies Debt 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 $ 14,994 $ 0
[1] derived from audited financial statements.