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Cover Page
Mar. 04, 2021
Dec. 31, 2020
Cover [Abstract]    
Document Type 8-K  
Document Period End Date Mar. 04, 2021  
Entity Registrant Name FORUM ENERGY TECHNOLOGIES, INC.  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-35504  
Entity Tax Identification Number 61-1488595  
Entity Address, Address Line One 10344 Sam Houston Park Drive  
Entity Address, Address Line Two Suite 300  
Entity Address, City or Town Houston  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77064  
City Area Code 281  
Local Phone Number 949-2500  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol FET  
Security Exchange Name NYSE  
Emerging Growth Company false  
Entity Central Index Key   0001401257
Amendment Flag   false