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Document and Entity Information
Oct. 01, 2019
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Oct. 01, 2019
Entity Registrant Name Cable One, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-36863
Entity Tax Identification Number 13-3060083
Entity Address, Address Line One 210 E. Earll Drive
Entity Address, City or Town Phoenix
Entity Address, State or Province AZ
Entity Address, Postal Zip Code 85012
City Area Code 602
Local Phone Number 364-6000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0001632127
Title of 12(b) Security Common Stock, par value $0.01
Trading Symbol CABO
Security Exchange Name NYSE