Derivative Financial Instruments - Gains and Losses on Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Amounts of gains and losses on the derivative instruments
Amount of Gain (Loss) Deferred as a Component of Accumulated Other Comprehensive Loss	$ 2,132	$ (1,059)	$ 2,662	$ (3,426)
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Loss to Costs of Goods Sold	(1,314)	1,969	(1,908)	1,639
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	2,132	(1,059)	2,662	(3,426)
Amount of Loss (Gain) Reclassified from Accumulated Other Comprehensive Loss to Costs of Goods Sold	$ (1,314)	$ 1,969	$ (1,908)	$ 1,639