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Financial assets - Disclosure of fair value measurement (Detail) - TRY (₺)
₺ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial assets [line items]    
Financial assets at fair value through other comprehensive income ₺ 345,602 ₺ 42,454
Financial assets at fair value through other comprehensive income, category [member] | Level 1 of fair value hierarchy [member]    
Disclosure of financial assets [line items]    
Financial assets at fair value through other comprehensive income ₺ 345,602 ₺ 42,454
Description of valuation techniques used in fair value measurement, entity's own equity instruments Pricing models based on quoted market prices at the end of the reporting period.