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Income Tax Expense - Summary of Income Tax Expense (Detail) - TRY (₺)
₺ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Major components of tax expense (income) [abstract]      
Current income tax expense ₺ (437,967) ₺ (200,663) ₺ (591,297)
Deferred income tax expense (133,791) (222,497) (75,815)
Total income tax expense ₺ (571,758) ₺ (423,160) ₺ (667,112)