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Note 8 - Derivative Instruments - Impact from Derivatives on Consolidated Statements of Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Net Gain (Loss) Recognized $ (77) $ (475) $ (871) $ (1,406)
Interest Rate Swap [Member]        
Net Gain (Loss) Recognized (77) (475) (871) (1,406)
Metal Swaps [Member]        
Net Gain (Loss) Recognized (141) (92) 577 136
Embedded Customer Derivatives [Member]        
Net Gain (Loss) Recognized $ 141 $ 92 $ (577) $ (136)