Other Income and Expense - Additional Information (Detail) - TRY (₺) ₺ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of other income (expense) [Abstract]
Other income	₺ 74,438	₺ 78,569	₺ 44,454
Other expenses	₺ 773,329	₺ 312,801	₺ 270,446

The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'function of expense' form for its analysis of expenses.

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