Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 26,400	$ 22,704
Accounts receivable-trade, net of allowance for expected credit losses of $3,674 and $4,540, respectively	424,814	566,834
Accounts receivable-affiliates	14,814	12,934
Inventories	135,918	69,634
Prepaid expenses and other current assets	75,433	101,981
Total current assets	677,379	774,087
PROPERTY, PLANT AND EQUIPMENT, net of accumulated depreciation of $570,806 and $529,068, respectively	2,833,002	2,851,555
GOODWILL	993,114	993,587
INTANGIBLE ASSETS, net of accumulated amortization of $670,382 and $631,449, respectively	1,574,216	1,612,480
INVESTMENTS IN UNCONSOLIDATED ENTITIES	22,626	23,182
OPERATING LEASE RIGHT-OF-USE ASSETS	177,010	180,708
OTHER NONCURRENT ASSETS	48,739	63,137
Total assets	6,326,086	6,498,736
CURRENT LIABILITIES:
Accounts payable-trade	367,463	515,049
Accounts payable-affiliates	22,864	17,717
Accrued expenses and other payables	142,836	232,062
Advance payments received from customers	25,326	19,536
Current maturities of long-term debt	4,521	4,683
Operating lease obligations	53,720	56,776
Total current liabilities	616,730	845,823
LONG-TERM DEBT, net of debt issuance costs of $24,022 and $19,795, respectively, and current maturities	3,281,402	3,144,848
OPERATING LEASE OBLIGATIONS	120,986	121,013
OTHER NONCURRENT LIABILITIES	112,034	114,079
COMMITMENTS AND CONTINGENCIES (NOTE 9)
EQUITY:
General partner, representing a 0.1% interest, 128,901 and 128,901 notional units, respectively	(51,474)	(51,390)
Limited partners, representing a 99.9% interest, 128,771,715 and 128,771,715 common units issued and outstanding, respectively	1,283,491	1,366,152
Accumulated other comprehensive loss	(341)	(385)
Noncontrolling interests	70,748	72,954
Total equity	1,650,783	1,735,690
Total liabilities and equity	6,326,086	6,498,736
Class D Preferred Units
CURRENT LIABILITIES:
PREFERRED UNITS	544,151	537,283
Class B Perpetual Preferred Units
EQUITY:
Preferred limited partners	305,468	305,468
Class C Perpetual Preferred Units
EQUITY:
Preferred limited partners	$ 42,891	$ 42,891