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Derivative Financial Instruments - Details of Currency Forward Contracts (Detail) ₺ in Thousands | Dec. 31, 2017 TRY (₺) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 TRY (₺) | Dec. 31, 2016 USD ($)
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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) |  |  |

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