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Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 26,106	$ 67,941	$ 73,594	$ 119,716
Sand sales revenue
Disaggregation of Revenue [Line Items]
Revenue	7,375	31,362	38,362	57,008
Shortfall revenue
Disaggregation of Revenue [Line Items]
Revenue	14,000	16,283	15,307	22,039
Logistics revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 4,731	$ 20,296	$ 19,925	$ 40,669
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	28.00%	46.00%	52.00%	48.00%
Product Concentration Risk | Percentage of Total Revenue | Shortfall revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	54.00%	24.00%	21.00%	18.00%
Product Concentration Risk | Percentage of Total Revenue | Logistics revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	18.00%	30.00%	27.00%	34.00%

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