FAIR VALUE DISCLOSURES Recurring and Non-recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Fair Value [Line Items]
Inventories	$ 129,614	$ 124,911
Assets held for sale	30,348	38,246
Investment in unconsolidated affiliates	126,170	210,162
Property and equipment	2,068,020	2,254,364
Goodwill	19,907	19,798	$ 29,990
Other intangible assets	27,686	27,212	27,858
Impairment of inventories	(5,717)	(7,572)	(5,439)
Impairment charges on assets held for sale	(15,853)	(12,450)	(29,571)
Impairments of investments in unconsolidated affiliates	(85,683)	0	0
Impairment of goodwill	0	(8,706)	$ (41,579)
Total loss on sale of assets and asset impairment charges	(107,253)	(28,728)
Rabbi Trust investments	2,300
Fair value measurements nonrecurring
Fair Value [Line Items]
Inventories	515	46,568
Assets held for sale	30,348	38,246
Investment in unconsolidated affiliates	62,267
Goodwill		19,798
Total assets	93,130	104,612
Fair value, measurements, recurring
Fair Value [Line Items]
Derivative financial instrument	718
Rabbi Trust investments	2,296	3,075
Total assets	3,014	3,075
Fair value, inputs, Level 1 \| Fair value measurements nonrecurring
Fair Value [Line Items]
Inventories	0	0
Assets held for sale	0	0
Investment in unconsolidated affiliates	0
Goodwill		0
Total assets	0	0
Fair value, inputs, Level 1 \| Fair value, measurements, recurring
Fair Value [Line Items]
Derivative financial instrument	0
Rabbi Trust investments	2,296	3,075
Total assets	2,296	3,075
Fair value, inputs, Level 2 \| Fair value measurements nonrecurring
Fair Value [Line Items]
Inventories	515	46,568
Assets held for sale	30,348	38,246
Investment in unconsolidated affiliates	0
Goodwill		0
Total assets	30,863	84,814
Fair value, inputs, Level 2 \| Fair value, measurements, recurring
Fair Value [Line Items]
Derivative financial instrument	718
Rabbi Trust investments	0	0
Total assets	718	0
Fair value, inputs, Level 3 \| Fair value measurements nonrecurring
Fair Value [Line Items]
Inventories	0	0
Assets held for sale	0	0
Investment in unconsolidated affiliates	62,267
Goodwill		19,798
Total assets	62,267	19,798
Fair value, inputs, Level 3 \| Fair value, measurements, recurring
Fair Value [Line Items]
Derivative financial instrument	0
Rabbi Trust investments	0	0
Total assets	$ 0	$ 0

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This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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