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RECENT ACCOUNTING PRONOUNCEMENTS (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Accounts receivable-trade, net $ (292,045)   $ (292,045)   $ (268,287)
Accounts receivable-other, net 40,312   40,312   28,401
Deferred costs (16,211)   (16,211)   (16,589)
Deferred revenue (35,860)   (35,860)   (35,648)
Net sales 330,742 $ 357,759 672,797 $ 719,935  
Cost of sales $ 259,543 283,792 $ 535,372 579,555  
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | ASU 2014-09 [Member]          
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]          
Accounts receivable-trade, net         (1,900)
Accounts receivable-other, net         1,900
Deferred costs         (3,200)
Deferred revenue         $ (3,200)
Net sales   (500)   6,700  
Cost of sales   $ (500)   $ 6,700