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Derivative Financial Instruments - Details of Currency Forward Contracts (Detail)
₺ in Thousands
Dec. 31, 2017
TRY (₺)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
TRY (₺)
Dec. 31, 2016
USD ($)
Disclosure of detailed information about financial instruments [line items]        
Current Derivative Financial Instruments Liabilities, Fair Value ₺ 15,478      
Currency forward contracts [member]        
Disclosure of detailed information about financial instruments [line items]        
Current Derivative Financial Instruments Liabilities, Fair Value (2,246)   ₺ (1,286)  
Currency forward contracts [member] | 28 February 2017 [member]        
Disclosure of detailed information about financial instruments [line items]        
Current Derivative Financial Instruments Liabilities, Buy - Notional Amount | $       $ 30,071,000
Current Derivative Financial Instruments Liabilities, Fair Value     ₺ (1,286)  
Currency forward contracts [member] | 30 January 2018 [member]        
Disclosure of detailed information about financial instruments [line items]        
Current Derivative Financial Instruments Liabilities, Buy - Notional Amount | $   $ 50,000,000    
Current Derivative Financial Instruments Liabilities, Fair Value ₺ (2,246)