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Finance Income and Costs - Summary of Finance Income and Costs (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure Of Finance Income And Costs [abstract]      
Fair value gains on derivative financial instruments ₺ 589,555 ₺ 385,560 ₺ 1,070
Interest income on bank deposits 278,599 158,206 303,221
Interest income on financial assets measured at amortized cost 185,004 445,943 436,024
Credit finance income 36,186 74,522 13,865
Other 1,105 563 1,859
Finance income 1,090,449 1,064,794 756,039
Net foreign exchange losses (718,501) (782,463) (489,320)
Interest expenses for financial liabilities measured at amortized cost (385,386) (343,290) (224,724)
Interest expenses for derivative financial instruments (244,841) (93,038)  
Litigation late payment interest expense (29,115)   (68,083)
Option premium charges (27,172) (10,114) (2,290)
Other (8,300) (8,688) (15,097)
Finance costs (1,413,315) (1,237,593) (799,514)
Net finance costs ₺ (322,866) ₺ (172,799) ₺ (43,475)