Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES:
Net loss	$ (17,508)	$ (24,710)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization, including debt issuance cost amortization	24,746	9,928
Loss on early extinguishment of debt		5,769
Non-cash equity-based compensation expense	7,075	655
Loss on sale of assets	373	7
Provision for doubtful accounts	364	293
Commodity derivative (gain) loss	7,209	(4,228)
Other	187	62
Changes in operating assets and liabilities, exclusive of acquisitions:
Accounts receivable - trade	17,633	139,458
Accounts receivable - affiliates	8,404	5,407
Inventories	(81,124)	(49,519)
Prepaid expenses and other assets	218	(929)
Trade accounts payable	35,599	(140,417)
Accrued expenses and other payables	6,276	(8,851)
Accounts payable - affiliates	3,604	(2,724)
Advance payments received from customers	12,880	14,890
Net cash provided by (used in) operating activities	25,936	(54,909)
INVESTING ACTIVITIES:
Purchases of long-lived assets	(30,192)	(2,684)
Acquisitions of businesses, including acquired working capital	(5,362)	(295,341)
Cash flows from commodity derivatives	(11,054)	15,514
Proceeds from sales of assets	1,088	361
Other		212
Net cash used in investing activities	(45,520)	(281,938)
FINANCING ACTIVITIES:
Proceeds from borrowings under revolving credit facilities	255,000	462,175
Payments on revolving credit facilities	(212,000)	(333,675)
Issuance of senior notes		250,000
Proceeds from borrowings on other long-term debt	880
Payments on other long-term debt	(2,884)	(300)
Debt issuance costs	(2,211)	(18,450)
Contributions	1,000	580
Distributions	(27,159)	(9,175)
Proceeds from sale of common units, net of offering costs		(673)
Net cash provided by financing activities	12,626	350,482
Net increase (decrease) in cash and cash equivalents	(6,958)	13,635
Cash and cash equivalents, beginning of period	11,561	7,832
Cash and cash equivalents, end of period	$ 4,603	$ 21,467