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Document and Enitity Information - shares
6 Months Ended
Jun. 30, 2018
Jul. 26, 2018
Document Entity Information [Abstract]    
Entity Registrant Name ADVANCED ENERGY INDUSTRIES INC  
Entity Central Index Key 0000927003  
Document Type 10-Q  
Document Period End Date Jun. 30, 2018  
Amendment Flag false  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   39,113,566