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Note 11 - Fair Value of Assets and Liabilities - Fair Value Measurements, Recorded (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Interest Rate Swap [Member] |  |
Derivative Asset | $ 300 | $ 100
Fair Value, Recurring [Member] |  |
Total assets at fair value | 18,772 | 16,896
Total liabilities recorded at fair value | 3,457 | 5,224
Fair Value, Recurring [Member] | Supplemental Executive Retirement Plan [Member] |  |
Derivative Asset | 15,061 | 11,617
Fair Value, Recurring [Member] | Metal Swaps [Member] |  |
Derivative Asset | 3,055 | 4,458
Derivative liability | 3,457 | 5,224
Fair Value, Recurring [Member] | Embedded Customer Derivatives [Member] |  |
Derivative Asset | 402 | 766
Fair Value, Recurring [Member] | Interest Rate Swap [Member] |  |
Derivative Asset | 254 | 55
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total assets at fair value | 15,061 | 11,617
Total liabilities recorded at fair value | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Supplemental Executive Retirement Plan [Member] |  |
Derivative Asset | 15,061 | 11,617
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Metal Swaps [Member] |  |
Derivative Asset | 0 | 0
Derivative liability | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Embedded Customer Derivatives [Member] |  |
Derivative Asset | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member] |  |
Derivative Asset | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total assets at fair value | 3,711 | 5,279
Total liabilities recorded at fair value | 3,457 | 5,224
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Supplemental Executive Retirement Plan [Member] |  |
Derivative Asset | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Metal Swaps [Member] |  |
Derivative Asset | 3,055 | 4,458
Derivative liability | 3,457 | 5,224
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Embedded Customer Derivatives [Member] |  |
Derivative Asset | 402 | 766
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |
Derivative Asset | 254 | 55
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total assets at fair value | 0 | 0
Total liabilities recorded at fair value | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Supplemental Executive Retirement Plan [Member] |  |
Derivative Asset | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Metal Swaps [Member] |  |
Derivative Asset | 0 | 0
Derivative liability | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Embedded Customer Derivatives [Member] |  |
Derivative Asset | 0 | 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member] |  |
Derivative Asset | $ 0 | $ 0

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