v3.10.0.1
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2018
Oct. 31, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Trading Symbol ECPG  
Entity Registrant Name ENCORE CAPITAL GROUP INC  
Entity Central Index Key 0001084961  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Emerging Growth Company false  
Small Business false  
Entity Common Stock, Shares Outstanding   30,852,178