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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Mar. 08, 2017
Jun. 30, 2016
Document Documentand Entity Information [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2016    
Document Fiscal Year Focus 2016    
Document Fiscal Period Focus FY    
Entity Registrant Name Advanced Emissions Solutions, Inc.    
Entity Central Index Key 0001515156    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status No    
Entity Voluntary Filers Yes    
Entity Filer Category Accelerated Filer    
Entity Common Stock, Shares Outstanding   22,022,683  
Entity Public Float     $ 106.1