Annual report pursuant to Section 13 and 15(d)

Derivatives Schedule of Fair Value and Cash Flow Hedges Including in Earnings (Details)

v3.20.1
Derivatives Schedule of Fair Value and Cash Flow Hedges Including in Earnings (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Derivative [Line Items]      
Other Nonoperating Income (Expense) $ 4,356 $ (4,513) $ (14,692)
Cost of Goods Sold (Deprecated 2018-01-31) (840,066) (924,276) (860,744)
Currency Swap [Member]      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net 2,600    
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months (7,900)    
Forward Contracts [Member]      
Derivative [Line Items]      
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net (7,300)    
Foreign Exchange Forward [Member]      
Derivative [Line Items]      
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months 11,000    
Other Operating Income (Expense) [Member]      
Derivative [Line Items]      
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge (3,337) (6,034) 0
Gain (Loss) on Fair Value Hedges Recognized in Earnings 1,715 1,900 0
Cost of sales      
Derivative [Line Items]      
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net 3,111 (698) 2,420
Cash Flow Hedging [Member] | Other Operating Income (Expense) [Member] | Currency Swap [Member]      
Derivative [Line Items]      
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net (4,670)    
Cash Flow Hedging [Member] | Cost of sales | Foreign Exchange Forward [Member]      
Derivative [Line Items]      
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net $ 3,111 $ (698) $ 2,420