Mammoth Energy Services, Inc. Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Schedule of Letters of Credit (Details) - Letter of Credit - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Total letters of credit	$ 8,742	$ 8,437
Environmental remediation
Line of Credit Facility [Line Items]
Total letters of credit	4,182	3,877
Insurance programs
Line of Credit Facility [Line Items]
Total letters of credit	4,105	4,105
Rail car commitments
Line of Credit Facility [Line Items]
Total letters of credit	$ 455	$ 455