Transactions with Affiliates (Tables)

12 Months Ended

Mar. 31, 2018

Related Party Transactions [Abstract]

Summary of purchase and sales transactions of products and services

The following table summarizes these related party transactions for the periods indicated:

	Year Ended March 31,
	2018		2017		2016
	(in thousands)
Sales to SemGroup	$	606	$	3,866	$	43,825
Purchases from SemGroup	$	5,034	$	12,254	$	53,209
Sales to equity method investees	$	294	$	692	$	14,836
Purchases from equity method investees	$	66,820	$	121,336	$	113,780
Sales to entities affiliated with management	$	268	$	290	$	318
Purchases from entities affiliated with management	$	3,870	$	15,209	$	45,197

Schedule of accounts receivable from affiliates

Accounts receivable from affiliates consist of the following at the dates indicated:

	March 31,
	2018		2017
	(in thousands)
Receivables from SemGroup	$	49	$	6,668
Receivables from NGL Energy Holdings LLC	4,693		—
Receivables from equity method investees	6		15
Receivables from entities affiliated with management	24		28
Total	$	4,772	$	6,711

Schedule of accounts payable to affiliates

Accounts payable to affiliates consist of the following at the dates indicated:

	March 31,
	2018		2017
	(in thousands)
Payables to SemGroup	$	—	$	6,571
Payables to equity method investees	8		1,306
Payables to entities affiliated with management	1,246		41
Total	$	1,254	$	7,918

Schedule of capital expenditures

The allocation of the consideration was as follows:

Current assets	$	276
Property, plant and equipment	1,366
Intangible assets (customer relationships)	4,782
Fair value of net assets acquired	$	6,424