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Revenue Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 65,690	$ 63,146	$ 185,406	$ 160,222
Sand sales revenue
Disaggregation of Revenue [Line Items]
Revenue	25,153	39,500	73,161	96,417
Reservation revenue
Disaggregation of Revenue [Line Items]
Revenue	4,500	5,190	13,500	17,656
Shortfall revenue
Disaggregation of Revenue [Line Items]
Revenue	15,620	1,426	37,659	2,094
Logistics revenue
Disaggregation of Revenue [Line Items]
Revenue	$ 20,417	$ 17,030	$ 61,086	$ 44,055
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	38.00%	63.00%	40.00%	60.00%
Product Concentration Risk | Percentage of Total Revenue | Reservation revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	7.00%	8.00%	7.00%	11.00%
Product Concentration Risk | Percentage of Total Revenue | Shortfall revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	24.00%	2.00%	20.00%	1.00%
Product Concentration Risk | Percentage of Total Revenue | Logistics revenue
Disaggregation of Revenue [Line Items]
Percentage of Total Revenue	31.00%	27.00%	33.00%	28.00%

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