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Accounts Receivable Discount Programs (Details) - USD ($)
 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Accounts Receivable Discount Programs [Abstract]    
Receivables discounted $ 287,206,000 $ 263,833,000
Weighted average days 340 days 341 days
Annualized weighted average discount rate 4.20% 3.20%
Amount of discount as interest expense $ 11,377,000 $ 7,854,000