Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2021
Segment information
REVENUES	$ 1,488,655	$ 844,415
Depreciation and amortization, including amortization of debt issuance costs	87,981	87,680
Operating Loss	(69,334)	(10,785)
Additions to property, plant and equipment and intangible assets	31,880	29,938
Long-lived assets, net	4,623,426		$ 4,866,051
Total assets	5,907,490		5,947,341
Operating segment | Water solutions
Segment information
REVENUES	130,226	88,065
Depreciation and amortization, including amortization of debt issuance costs	63,043	58,195
Operating Loss	7,583	(16,047)
Additions to property, plant and equipment and intangible assets	26,962	20,702
Long-lived assets, net	3,061,399		3,104,450
Total assets	3,197,706		3,204,850
Operating segment | Water solutions | Disposal service fees
Segment information
REVENUES	98,297	81,378
Operating segment | Water solutions | Sale of recovered crude oil
Segment information
REVENUES	13,801	1,368
Operating segment | Water solutions | Sale of water
Segment information
REVENUES	13,282	2,728
Operating segment | Water solutions | Other revenues
Segment information
REVENUES	4,846	2,591
Operating segment | Crude oil logistics
Segment information
REVENUES	553,624	276,039
Depreciation and amortization, including amortization of debt issuance costs	12,409	16,795
Operating Loss	(11,581)	23,320
Additions to property, plant and equipment and intangible assets	463	5,672
Long-lived assets, net	1,085,901		1,090,578
Total assets	1,797,705		1,665,005
Operating segment | Crude oil logistics | Crude oil sales
Segment information
REVENUES	535,429	230,728
Operating segment | Crude oil logistics | Crude oil transportation and other
Segment information
REVENUES	18,449	42,641
Operating segment | Crude oil logistics | Non-Topic 606 revenues
Segment information
Non-Topic 606 revenues	2,245	3,169
Operating segment | Liquids Logistics
Segment information
REVENUES	804,805	479,998
Depreciation and amortization, including amortization of debt issuance costs	7,045	8,233
Operating Loss	(53,409)	4,562
Additions to property, plant and equipment and intangible assets	3,544	1,532
Long-lived assets, net	430,065		626,221
Total assets	862,232		1,003,370
Operating segment | Liquids Logistics | Other revenues
Segment information
REVENUES	5,423	6,342
Operating segment | Liquids Logistics | Non-Topic 606 revenues
Segment information
Non-Topic 606 revenues	14,307	38,717
Operating segment | Liquids Logistics | Refined products sales
Segment information
REVENUES	393,109	210,547
Operating segment | Liquids Logistics | Propane sales
Segment information
REVENUES	160,403	121,528
Operating segment | Liquids Logistics | Butane sales
Segment information
REVENUES	118,540	55,197
Operating segment | Liquids Logistics | Other product sales
Segment information
REVENUES	114,330	48,335
Operating segment | Corporate and Other
Segment information
REVENUES	0	313
Operating segment | Corporate and Other | Non-Topic 606 revenues
Segment information
Non-Topic 606 revenues	0	313
Elimination of intersegment sales | Crude oil logistics
Segment information
REVENUES	(2,499)	(499)
Elimination of intersegment sales | Liquids Logistics
Segment information
REVENUES	(1,307)	(668)
Corporate and other
Segment information
Depreciation and amortization, including amortization of debt issuance costs	5,484	4,457
Operating Loss	(11,927)	(22,620)
Additions to property, plant and equipment and intangible assets	911	$ 2,032
Long-lived assets, net	46,061		44,802
Total assets	49,847		74,116
Non-US | Liquids Logistics
Segment information
Long-lived assets, net	21,300		20,900
Total assets	$ 44,000		$ 37,900