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Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 29,639	$ 26,106	$ 57,089	$ 73,594
Sand sales revenue
Disaggregation of Revenue [Line Items]
Revenue	28,801	7,375	51,948	38,362
Shortfall revenue
Disaggregation of Revenue [Line Items]
Revenue	0	14,000	1,741	15,307
Logistics revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 838	$ 4,731	$ 3,400	$ 19,925
Product Concentration Risk | Percentage of Total Revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	100.00%	100.00%	100.00%	100.00%
Product Concentration Risk | Percentage of Total Revenue | Sand sales revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	97.00%	28.00%	91.00%	52.00%
Product Concentration Risk | Percentage of Total Revenue | Shortfall revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	0.00%	54.00%	3.00%	21.00%
Product Concentration Risk | Percentage of Total Revenue | Logistics revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	3.00%	18.00%	6.00%	27.00%

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