v3.26.1
Document And Entity Information
Apr. 20, 2026
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Apr. 20, 2026
Entity Registrant Name WARRIOR MET COAL, INC.
Entity Central Index Key 0001691303
Entity Emerging Growth Company false
Entity File Number 001-38061
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 81-0706839
Entity Address, Address Line One 16243 Highway 216
Entity Address, City or Town Brookwood
Entity Address, State or Province AL
Entity Address, Postal Zip Code 35244
City Area Code 205
Local Phone Number 554-6150
Entity Information, Former Legal or Registered Name Not Applicable
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Common Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, par value $.01 per share
Trading Symbol HCC
Security Exchange Name NYSE
Preferred Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Rights to Purchase Series A Junior Participating Preferred Stock, par value $0.01 per share
No Trading Symbol Flag true
Security Exchange Name NYSE