Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.20.4
Document and Entity Information - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2020
Mar. 18, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Period End Date Dec. 31, 2020    
Current Fiscal Year End Date --12-31    
Entity Registrant Name MONITRONICS INTERNATIONAL, INC    
Entity Central Index Key 0001265107    
Entity Filer Category Non-accelerated Filer    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Document Annual Report true    
Document Transition Report false    
Entity Interactive Data Current Yes    
Entity Common Stock, Shares Outstanding (in shares)   22.5  
Entity Public Float     $ 22.6