Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 12,008	$ 18,572
Accounts receivable-trade, net of allowance for doubtful accounts of $4,055 and $4,016, respectively	947,534	998,203
Accounts receivable-affiliates	12,445	12,867
Inventories	183,738	136,128
Prepaid expenses and other current assets	90,694	65,918
Assets held for sale	95,093	580,985
Total current assets	1,341,512	1,812,673
PROPERTY, PLANT AND EQUIPMENT, net of accumulated depreciation of $504,731 and $417,457, respectively	2,704,112	1,828,940
GOODWILL	1,307,055	1,110,456
INTANGIBLE ASSETS, net of accumulated amortization of $603,573 and $503,117, respectively	1,600,555	800,889
INVESTMENTS IN UNCONSOLIDATED ENTITIES	22,236	1,127
OPERATING LEASE RIGHT-OF-USE ASSETS	183,141	0
OTHER NONCURRENT ASSETS	83,944	113,857
ASSETS HELD FOR SALE	0	234,551
Total assets	7,242,555	5,902,493
CURRENT LIABILITIES:
Accounts payable-trade	846,767	879,063
Accounts payable-affiliates	29,374	28,469
Accrued expenses and other payables	352,848	107,759
Advance payments received from customers	29,993	8,461
Current maturities of long-term debt	4,835	648
Operating lease obligations	57,091	0
Liabilities held for sale	40,899	226,753
Total current liabilities	1,361,807	1,251,153
LONG-TERM DEBT, net of debt issuance costs of $20,263 and $12,008, respectively, and current maturities	3,068,205	2,160,133
OPERATING LEASE OBLIGATIONS	122,798	0
OTHER NONCURRENT LIABILITIES	104,060	63,542
NONCURRENT LIABILITIES HELD FOR SALE	0	33
COMMITMENTS AND CONTINGENCIES (NOTE 9)
EQUITY:
General partner, representing a 0.1% interest, 128,477 and 124,633 notional units, respectively	(51,038)	(50,603)
Limited partners, representing a 99.9% interest, 128,348,906 and 124,508,497 common units issued and outstanding, respectively	1,682,071	2,067,197
Accumulated other comprehensive loss	(248)	(255)
Noncontrolling interests	74,739	58,748
Total equity	2,053,917	2,277,818
Total liabilities and equity	7,242,555	5,902,493
Class A Convertible Preferred Units
CURRENT LIABILITIES:
CONVERTIBLE PREFERRED UNITS	0	149,814
Class D Preferred Units
CURRENT LIABILITIES:
CONVERTIBLE PREFERRED UNITS	531,768	0
Class B Perpetual Preferred Units
EQUITY:
Preferred limited partners	305,488	202,731
Class C Perpetual Preferred Units
EQUITY:
Preferred limited partners	$ 42,905	$ 0