v3.22.2.2
Cover Page - shares
 9 Months Ended
Sep. 30, 2022
Oct. 26, 2022
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2022  
Document Transition Report false  
Entity File Number 000-20278  
Entity Registrant Name ENCORE WIRE CORP  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 75-2274963  
Entity Address, Address Line One 1329 Millwood Road  
Entity Address, City or Town McKinney  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 75069  
City Area Code 972  
Local Phone Number 562-9473  
Title of 12(b) Security Common Stock, par value $.01 per share  
Trading Symbol WIRE  
Security Exchange Name NASDAQ  
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 Common Stock, Shares Outstanding   18,342,580
Entity Central Index Key 0000850460  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3  
Amendment Flag false