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Derivative Financial Instruments - (Derivatives Designated as Cash Flow Hedges) (Details) - Derivatives Designated as Cash Flow Hedges - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2019
Dec. 30, 2018
Dec. 31, 2019
Dec. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]        
Pretax Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) $ (6,034) $ 82 $ (1,933) $ (10,207)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) (1,570) (6,103) 882 (9,625)
Lead forward contracts | Cost of Sales        
Derivative Instruments, Gain (Loss) [Line Items]        
Pretax Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) (5,267) (501) (771) (11,510)
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) (1,034) (6,892) 1,698 (9,611)
Foreign currency forward contracts | Cost of Sales        
Derivative Instruments, Gain (Loss) [Line Items]        
Pretax Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion) (767) 583 (1,162) 1,303
Pretax Gain (Loss) Reclassified from AOCI into Income (Effective Portion) $ (536) $ 789 $ (816) $ (14)