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Note H - Derivative Financial Instruments (Tables) | 6 Months Ended
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Sep. 30, 2023
Notes Tables |
Schedule of Derivative Instruments [Table Text Block] |
| Asset Derivatives |  | Liability Derivatives |
| Balance Sheet |  |  |  |  | Balance Sheet |  |  |  |
Derivatives not designated as hedging instruments: | Location |  | Fair Value |  | Location |  | Fair Value |
Hot-rolled coil steel contracts | Current portion of derivative assets |  | $ | 692 |  | Current portion of derivative liability |  | $ | 400 |
| Asset Derivatives |  | Liability Derivatives |
| Balance Sheet |  |  |  |  | Balance Sheet |  |  |  |
Derivatives not designated as hedging instruments: | Location |  | Fair Value |  | Location |  | Fair Value |
Hot-rolled coil steel contracts | Current portion of derivative assets |  | $ | 536 |  | Current portion of derivative liability |  | $ | 2,212 |
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Pre-Tax Gain Recognized in OCI |  | Location of Loss Reclassified from AOCI into Net Earnings |  | Pre- Tax Loss Reclassified from AOCI into Net Earnings |
For the three months ended September 30, 2023: |  |  |  |  |  |  |  |  |
Hot-rolled coil steel contracts |  | $ | — |  | Sales |  | $ | — |
Total |  | $ | — |  |  |  | $ | — |
For the three months ended September 30, 2022: |  |  |  |  |  |  |  |  |
Hot-rolled coil steel contracts |  | $ | 590 |  | Sales |  | $ | (1,490 | )
Total |  | $ | 590 |  |  |  | $ | (1,490 | )
For the six months ended September 30, 2023: |  |  |  |  |  |  |  |  |
Hot-rolled coil steel contracts |  | $ | — |  | Sales |  | $ | (418 | )
Total |  | $ | — |  |  |  | $ | (418 | )
For the six months ended September 30, 2022: |  |  |  |  |  |  |  |  |
Hot-rolled coil steel contracts |  | $ | 9,424 |  | Sales |  | $ | (2,117 | )
Total |  | $ | 9,424 |  |  |  | $ | (2,117 | )
Derivative Instruments, Gain (Loss) [Table Text Block] |
|  |  | Gain Recognized in Earnings |
| Location of Gain |  | for the Three Months Ended |
| Recognized in Earnings |  | September 30, 2023 |
Hot-rolled coil steel contracts | Gain on economic hedges of risk |  | $ | 4,402 |
|  |  | Gain Recognized in Earnings |
| Location of Gain |  | for the Six Months Ended |
| Recognized in Earnings |  | September 30, 2023 |
Hot-rolled coil steel contracts | Gain on economic hedges of risk |  | $ | 4,832 |
|  |  | Gain Recognized in Earnings |
| Location of Gain |  | for the Three Months Ended |
| Recognized in Earnings |  | September 30, 2022 |
Hot-rolled coil steel contracts | Gain on economic hedges of risk |  | $ | 3,749 |
|  |  | Gain Recognized in Earnings |
| Location of Gain |  | for the Six Months Ended |
| Recognized in Earnings |  | September 30, 2022 |
Hot-rolled coil steel contracts | Gain on economic hedges of risk |  | $ | 6,504 |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Gain (Loss) on |
|  | Derivatives |
Balance at March 31, 2023 |  | $ | (317 | )
Other comprehensive income, net of loss, before reclassification |  |  | — |
Total loss reclassified from AOCI (1) |  |  | 317 |
Net current period other comprehensive income |  |  | 317 |
Balance at September 30, 2023 |  | $ | — |
|  | Gain (Loss) on |
|  | Derivatives |
Balance at March 31, 2022 |  | $ | (10,269 | )
Other comprehensive income, net of loss, before reclassification |  |  | 7,147 |
Total loss reclassified from AOCI (1) |  |  | 1,606 |
Net current period other comprehensive income |  |  | 8,753 |
Balance at September 30, 2022 |  | $ | (1,516 | )

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