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Derivative Financial Instruments - Gains and Losses on Derivative Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Amounts of gains and losses on the derivative instruments        
Amount of Gain (Loss) Deferred as a Component of Accumulated Other Comprehensive Loss $ (6,326) $ (1,381) $ (9,752) $ 56
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Loss to Costs of Goods Sold 3,446 (739) 5,085 (1,097)
Designated as hedging instruments | Cash flow hedges        
Amounts of gains and losses on the derivative instruments        
Amount of Gain (Loss) Deferred as a Component of Accumulated Other Comprehensive Loss (6,326) (1,381) (9,752) 56
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Loss to Costs of Goods Sold $ 3,446 $ (739) $ 5,085 $ (1,097)