v3.19.3
Cover Page - shares
9 Months Ended
Sep. 30, 2019
Oct. 25, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 000-09881  
Entity Incorporation, State or Country Code VA  
Entity Tax Identification Number 54-1162807  
Entity Address, Address Line One 500 Shentel Way  
Entity Address, City or Town Edinburg  
Entity Address, State or Province VA  
Entity Address, Postal Zip Code 22824  
City Area Code 540  
Local Phone Number 984-4141  
Title of 12(b) Security Common Stock (No Par Value)  
Trading Symbol SHEN  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   49,857,142
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Registrant Name SHENANDOAH TELECOMMUNICATIONS COMPANY  
Entity Central Index Key 0000354963  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Amendment Flag false