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Commitments and Contingencies - Investigation Initiated by ICTA on Subscription Numbers and Radio Utilization and Usage Fees - Additional Information (Detail) - TRY (₺)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Disclosure of commitments and contingencies [Line Items]    
Provision for litigation settlement amount ₺ 417,668,000 ₺ 0
Investigation initiated by ICTA on subscription numbers and radio utilization and usage fees [member]    
Disclosure of commitments and contingencies [Line Items]    
Administrative fines on radio utilization ₺ 11,240,000  
Early payment Discount on Administrative fines 25.00%  
Litigation principal and interest amount ₺ 156,637,000  
Litigation settlement amount 164,469,000  
Provision for litigation settlement amount ₺ 157,446,000 ₺ 0