Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
OPERATING ACTIVITIES:
Net (loss) income	$ (143,124)	$ 52,492	$ (184,101)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization, including amortization of debt issuance costs	282,731	290,879	306,208
Loss (gain) on early extinguishment or revaluation of liabilities, net	57,961	3,488	(8,308)
Equity-based compensation expense	1,098	2,718	(1,052)
Loss on disposal or impairment of assets, net	115,936	86,888	94,254
Change in provision for expected credit losses	471	(385)	929
Net adjustments to fair value of derivatives	1,047	5,383	116,556
Equity in earnings of unconsolidated entities	(4,120)	(4,120)	(1,400)
Distributions of earnings from unconsolidated entities	5,190	4,627	2,205
Lower of cost or net realizable value adjustments	4,564	3,227	14,761
Other	3,239	1,827	2,310
Changes in operating assets and liabilities, exclusive of acquisitions:
Accounts receivable-trade and affiliates	230,368	86,629	(397,607)
Inventories	7,104	85,050	(119,806)
Other current and noncurrent assets	28,195	20,848	40,158
Accounts payable-trade and affiliates	(219,997)	(155,883)	405,420
Other current and noncurrent liabilities	5,501	(38,482)	(64,681)
Net cash provided by operating activities	376,164	445,186	205,846
INVESTING ACTIVITIES:
Capital expenditures	(152,295)	(147,765)	(142,359)
Net settlements of derivatives	(1,022)	54,430	(152,055)
Proceeds from sales of assets	53,246	45,978	18,500
Proceeds from divestitures of businesses and investments, net	16,000	111,633	63,489
Investments in unconsolidated entities	(258)	(88)	(350)
Distributions of capital from unconsolidated entities	568	0	367
Net cash (used in) provided by investing activities	(83,761)	64,188	(212,408)
FINANCING ACTIVITIES:
Proceeds from borrowings under ABL Facility	1,652,000	2,007,000	1,815,000
Payments on ABL Facility	(1,790,000)	(1,985,000)	(1,703,000)
Issuance of secured debt	2,894,873	0	0
Repayment and repurchase of senior secured and unsecured notes	(2,781,067)	(479,302)	(83,167)
Payments on other long-term debt	0	(43,278)	(7,390)
Debt issuance costs	(53,170)	(3,294)	(12,932)
Distributions to preferred unitholders	(178,299)	0	0
Distributions to noncontrolling interest owners	(1,586)	(1,993)	(1,635)
Common unit repurchases and cancellations	(84)	(99)	(90)
Payments to settle contingent consideration liabilities	(1,576)	(1,789)	(1,231)
Principal payments of finance lease	(16)	(10)	0
Net cash (used in) provided by financing activities	(258,925)	(507,765)	5,555
Net increase (decrease) in cash and cash equivalents	33,478	1,609	(1,007)
Cash and cash equivalents, beginning of period	5,431	3,822	4,829
Cash and cash equivalents, end of period	38,909	5,431	3,822
Supplemental cash flow information:
Cash interest paid	247,395	265,420	254,814
Income taxes paid (net of income tax refunds)	3,250	3,410	2,480
Supplemental non-cash investing and financing activities:
Accrued capital expenditures	$ 9,626	$ 7,533	$ 14,558