BASIS OF PRESENTATION AND ORGANIZATION (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Basic Earnings Per Share	$ (1.76)
Cost of Goods and Services Sold	$ 2,924,920	$ 2,607,556	$ 2,774,449
Selling, General and Administrative Expense	298,386	292,630	285,001
Debt and Lease Obligation	1,488,821	1,438,284
Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold		2,533,153	2,689,818
Selling, General and Administrative Expense		289,521	281,547
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment		(25,722)	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		0	0
Restatement Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold	2,962,345	2,607,556	2,774,449
Selling, General and Administrative Expense	304,837	292,630	285,001
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment		0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		(103,234)	(88,085)
Accounting Standards Update 2017-07 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cost of Goods and Services Sold		74,403	84,631
Selling, General and Administrative Expense		3,109	3,454
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment		25,722	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)		$ (103,234)	$ (88,085)
Maximum [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	95,000
LowEnd [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 85,000