Other Matters (Details) $ in Thousands		1 Months Ended	12 Months Ended
	Jun. 03, 2016 USD ($)	Mar. 31, 2015 USD ($) producer	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Oil and Gas Delivery Commitments and Contracts
Storage sublease agreement term			5 years
Storage sublease agreement number of payments			5
Storage sublease agreement period of benefit			4 years
Gain on termination of contract			$ 16,205	$ 0	$ 0
Payment to terminate contract			16,875	0	0
Payments for early extinguishment of liabilities			25,884	0	0
Loss on disposition or impairment of assets, net			209,177	$ (320,766)	$ (41,184)
Crude Oil Rail Transloading Facility Contract
Oil and Gas Delivery Commitments and Contracts
Period of receipt of commitment release fee		5 years
Number of producers to pay a fee for each barrel of crude oil produced | producer		1
Producers commitment term		7 years
Crude Oil Rail Transloading Facility Contract | Other Income
Oil and Gas Delivery Commitments and Contracts
Gain on termination of contract		$ 31,600
Water solutions
Oil and Gas Delivery Commitments and Contracts
Gain on termination of contract			21,300
Payment to terminate contract	$ 49,600
Amortizable life	2 years
Increase in property, plant and equipment	$ 1,200
Intangible asset additions	3,300
Noncontrolling interest, increase from business combination	2,800
Payments for early extinguishment of liabilities	25,500		46,800
Release of liabilities, contract termination	$ 16,900
Loss on disposition or impairment of assets, net			$ 22,700