Transactions with Affiliates (Tables)

6 Months Ended

12 Months Ended

Sep. 30, 2014

Mar. 31, 2014

Transactions with Affiliates

Summary of purchase and sales transactions of products and services

	Three Months Ended				Six Months Ended
	September 30,				September 30,
	2014		2013		2014		2013
	(in thousands)
Sales to SemGroup	$	43,427	$	3,780	$	117,233	$	3,780
Purchases from SemGroup	45,730		28,377		118,997		47,916
Purchases from equity method investees	34,689		—		70,965		—
Sales to equity method investees	9,131		—		9,131		—
Sales to entities affiliated with management	1,706		58,769		1,854		109,872
Purchases from entities affiliated with management	3,845		48,522		6,984		56,346

	Year Ended March 31,
	2014		2013		2012
	(in thousands)
Sales to SemGroup	$	306,780	$	32,431	$	29,200
Purchases from SemGroup	445,951		60,425		23,800
Sales to entities affiliated with management	110,824		16,828		—
Purchases from entities affiliated with management	120,038		60,942		—

Schedule of receivables from affiliates

	September 30,		March 31,
	2014		2014
	(in thousands)
Receivables from SemGroup	$	39,331	$	7,303
Receivables from entities affiliated with management	1,705		142
Receivables from equity method investees	670		—
Total	$	41,706	$	7,445

	March 31,
	2014		2013
	(in thousands)
Receivables from entities affiliated with management	$	142	$	22,883
Receivables from SemGroup	7,303		—
	$	7,445	$	22,883

Schedule of payables to affiliates

	September 30,		March 31,
	2014		2014
	(in thousands)
Payables to SemGroup	$	44,015	$	27,738
Payables to equity method investees	39,549		48,454
Payables to entities affiliated with management	1,743		654
Total	$	85,307	$	76,846

	March 31,
	2014		2013
	(in thousands)
Payables to SemGroup	$	76,192	$	4,601
Payables to entities affiliated with management	654		2,299
	$	76,846	$	6,900