XML 39 R27.htm IDEA: XBRL DOCUMENT v3.21.1
Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consist of the following:
March 31,December 31,
($ in thousands)20212020
Proppants$15,178 $13,658 
Chemicals15,660 16,434 
Maintenance parts and other98,500 88,476 
$129,338 $118,568