SUPPLEMENTAL CONDENSED CONSOLIDATING FINANCIAL INFORMATION - Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities			$ (57,165)	$ (26,902)
Capital expenditures	$ (18,511)	$ (8,407)	(25,950)	(17,302)
Proceeds from asset dispositions	1,799	688	5,003	8,462
Cash transferred in sale of subsidiaries, net of cash received			(22,458)	0
Net cash used in investing activities			(43,405)	(8,840)
Proceeds from borrowings			225,585	387
Debt issuance costs			(14,130)	(2,554)
Repayment of debt			(99,228)	(29,970)
Dividends paid				0
Increases (decreases) in cash related to intercompany advances and debt			0	0
Dividends paid to noncontrolling interest		(580)	0	(580)
Partial prepayment of put/call obligation			(1,323)	(27)
Issuance of common stock			0	2,830
Repurchases for tax withholdings on vesting of equity awards			0	(1,504)
Net cash provided by (used in) financing activities			110,904	(31,418)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			4,406	(5,272)
Net decrease in cash, cash equivalents and restricted cash			14,740	(72,432)
Cash and cash equivalents at beginning of period			178,055	380,223
Cash, cash equivalents and restricted cash at end of period	192,795	307,791	192,795	307,791
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities			0	0
Capital expenditures			0	0
Proceeds from asset dispositions			0	0
Cash transferred in sale of subsidiaries, net of cash received			0
Net cash used in investing activities			0	0
Proceeds from borrowings			0	0
Debt issuance costs			0	0
Repayment of debt			0	0
Dividends paid				0
Increases (decreases) in cash related to intercompany advances and debt			0	0
Dividends paid to noncontrolling interest				0
Partial prepayment of put/call obligation			0	0
Issuance of common stock				0
Repurchases for tax withholdings on vesting of equity awards				0
Net cash provided by (used in) financing activities			0	0
Effect of exchange rate changes on cash, cash equivalents and restricted cash			0	0
Net decrease in cash, cash equivalents and restricted cash			0	0
Cash and cash equivalents at beginning of period				0
Cash, cash equivalents and restricted cash at end of period	0	0	0	0
Parent Company Only
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities			(66,491)	(35,375)
Capital expenditures			(2,732)	(1,536)
Proceeds from asset dispositions			0	0
Cash transferred in sale of subsidiaries, net of cash received			0
Net cash used in investing activities			(2,732)	(1,536)
Proceeds from borrowings			150,000	0
Debt issuance costs			(6,695)	(597)
Repayment of debt			(74,818)	(8,841)
Dividends paid				162,941
Increases (decreases) in cash related to intercompany advances and debt			(58,549)	(158,992)
Dividends paid to noncontrolling interest				0
Partial prepayment of put/call obligation			0	(27)
Issuance of common stock				2,830
Repurchases for tax withholdings on vesting of equity awards				(1,504)
Net cash provided by (used in) financing activities			9,938	(4,190)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			0	0
Net decrease in cash, cash equivalents and restricted cash			(59,285)	(41,101)
Cash and cash equivalents at beginning of period				277,176
Cash, cash equivalents and restricted cash at end of period	31,301	236,075	31,301	236,075
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities			17,907	14,041
Capital expenditures			(2,844)	(2,499)
Proceeds from asset dispositions			4,935	7,528
Cash transferred in sale of subsidiaries, net of cash received			0
Net cash used in investing activities			2,091	5,029
Proceeds from borrowings			0	0
Debt issuance costs			0	(32)
Repayment of debt			(10,347)	(10,505)
Dividends paid				1,649
Increases (decreases) in cash related to intercompany advances and debt			(5,340)	(17,955)
Dividends paid to noncontrolling interest				0
Partial prepayment of put/call obligation			0	0
Issuance of common stock				0
Repurchases for tax withholdings on vesting of equity awards				0
Net cash provided by (used in) financing activities			(15,687)	(26,843)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			0	0
Net decrease in cash, cash equivalents and restricted cash			4,311	(7,773)
Cash and cash equivalents at beginning of period				8,904
Cash, cash equivalents and restricted cash at end of period	7,516	1,131	7,516	1,131
Non- Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities			(8,581)	(5,568)
Capital expenditures			(20,374)	(13,267)
Proceeds from asset dispositions			68	934
Cash transferred in sale of subsidiaries, net of cash received			(22,458)
Net cash used in investing activities			(42,764)	(12,333)
Proceeds from borrowings			75,585	387
Debt issuance costs			(7,435)	(1,925)
Repayment of debt			(14,063)	(10,624)
Dividends paid				(164,590)
Increases (decreases) in cash related to intercompany advances and debt			63,889	176,947
Dividends paid to noncontrolling interest				(580)
Partial prepayment of put/call obligation			(1,323)	0
Issuance of common stock				0
Repurchases for tax withholdings on vesting of equity awards				0
Net cash provided by (used in) financing activities			116,653	(385)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			4,406	(5,272)
Net decrease in cash, cash equivalents and restricted cash			69,714	(23,558)
Cash and cash equivalents at beginning of period				94,143
Cash, cash equivalents and restricted cash at end of period	$ 153,978	$ 70,585	$ 153,978	$ 70,585