Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES:
Net loss	$ (18,440)	$ (14,628)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization, including debt issuance cost amortization	51,821	25,476
Loss on early extinguishment of debt		5,769
Non-cash equity-based compensation expense	6,762	2,957
Loss (gain) on disposal of assets	2,163	(23)
Provision for doubtful accounts	781	356
Commodity derivative (gain) loss	17,881	(5,019)
Other	8	72
Changes in operating assets and liabilities, exclusive of acquisitions:
Accounts receivable - trade	(27,881)	101,739
Accounts receivable - affiliates	19,812	6,768
Inventories	(226,727)	(121,981)
Prepaid expenses and other current assets	(10,830)	3,793
Trade accounts payable	61,093	(77,965)
Accrued expenses and other payables	18,065	(15,664)
Accounts payable - affiliates	11,529	(6,698)
Advance payments received from customers	45,622	42,242
Net cash used in operating activities	(48,341)	(52,806)
INVESTING ACTIVITIES:
Purchases of long-lived assets	(67,399)	(14,595)
Acquisitions of businesses, including acquired working capital, net of cash acquired	(393,008)	(307,082)
Cash flows from commodity derivatives	(19,074)	10,692
Proceeds from sales of assets	2,224	581
Other		427
Net cash used in investing activities	(477,257)	(309,977)
FINANCING ACTIVITIES:
Proceeds from borrowings under revolving credit facilities	1,061,500	594,675
Payments on revolving credit facilities	(893,000)	(422,675)
Issuance of senior notes		250,000
Proceeds from borrowings on other long-term debt	880
Payments on other long-term debt	(4,507)	(251)
Debt issuance costs	(2,218)	(17,839)
Contributions	2,444	751
Distributions	(60,623)	(22,883)
Proceeds from sale of common units, net of offering costs	415,089	(818)
Net cash provided by financing activities	519,565	380,960
Net increase (decrease) in cash and cash equivalents	(6,033)	18,177
Cash and cash equivalents, beginning of period	11,561	7,832
Cash and cash equivalents, end of period	$ 5,528	$ 26,009