Revenue - Disaggregation Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)
Disaggregation of Revenue [Line Items]
Number of Reportable Segments | segment	3	3
Total Revenue	$ 261,270	$ 186,865	$ 75,422
Permian Basin
Disaggregation of Revenue [Line Items]
Total Revenue	196,557	107,997	32,578
Bakken Basin
Disaggregation of Revenue [Line Items]
Total Revenue	20,621	25,813	22,351
Government
Disaggregation of Revenue [Line Items]
Total Revenue	25,071	25,536	16,770
Other assets
Disaggregation of Revenue [Line Items]
Total Revenue	19,021	27,519	3,723
Services
Disaggregation of Revenue [Line Items]
Total Revenue	242,817	163,656	73,498
Services | Permian Basin
Disaggregation of Revenue [Line Items]
Total Revenue	193,852	107,997	32,578
Services | Bakken Basin
Disaggregation of Revenue [Line Items]
Total Revenue	20,621	25,813	22,351
Services | Government
Disaggregation of Revenue [Line Items]
Total Revenue	25,071	25,536	16,770
Services | Other assets
Disaggregation of Revenue [Line Items]
Total Revenue	3,273	4,310	1,799
Construction fee
Disaggregation of Revenue [Line Items]
Total Revenue	18,453	23,209	1,924
Construction fee | Permian Basin
Disaggregation of Revenue [Line Items]
Total Revenue	2,705	0	0
Construction fee | Other assets
Disaggregation of Revenue [Line Items]
Total Revenue	$ 15,748	$ 23,209	$ 1,924