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Subsidiaries - Schedule of Non-Wholly Owned Subsidiaries That Have Material Non-Controlling Interests (Detail) - TRY (₺) ₺ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of subsidiaries [line items] |  |  |
Profit / (loss) allocated to non-controlling interests | ₺ 58,630 | ₺ 51,715 | ₺ (164,103)
Accumulated non controlling interests | ₺ 55,927 | ₺ 56,632 |
Inteltek [member] |  |  |
Disclosure of subsidiaries [line items] |  |  |
Place of incorporation and principal place of business | Turkey |  |
Proportion of own interests and voting held by non-controlling interest | 45.00% | 45.00% |
Profit / (loss) allocated to non-controlling interests | ₺ 35,924 | ₺ 39,346 |
Accumulated non controlling interests | 46,072 | 50,863 |
Subsidiaries with immaterial non-controlling interests [member] |  |  |
Disclosure of subsidiaries [line items] |  |  |
Profit / (loss) allocated to non-controlling interests | 22,706 | 12,369 |
Accumulated non controlling interests | ₺ 9,855 | ₺ 5,769 |

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- Definition The amount of equity in a subsidiary not attributable, directly or indirectly, to a parent. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 12 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_12_f&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph q -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_q&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 10 -IssueDate 2017-01-01 -Paragraph 22 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=10&date=2017-03-01&anchor=para_22&doctype=Standard -URIDate 2017-03-09 + Details
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