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Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2015
Aug. 05, 2015
Entity Registrant Name CABLE ONE, INC.  
Entity Central Index Key 0001632127  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Current Reporting Status Yes  
Entity Voluntary Filers No  
Entity Well-known Seasoned Issuer No  
Entity Common Stock, Shares Outstanding (in shares)   5,845,358
Document Type 10-Q  
Document Period End Date Jun. 30, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q2  
Amendment Flag false