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Expenses by Nature - Summary of Expenses by Nature Administrative Expenses (Detail) - TRY (₺)
₺ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses ₺ (779,755) ₺ (673,370) ₺ (645,196)
Employee benefit expenses [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses (483,419) (425,681) (346,151)
Collection expenses [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses (57,097) (37,525) (20,415)
Consultancy expenses [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses (51,308) (38,252) (50,247)
Travel and entertainment expenses [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses (34,644) (38,406) (30,957)
Maintenance and repair expenses [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses (26,610) (26,867) (24,342)
Rent expenses [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses 0   (36,280)
Impairment expense recognized on receivables [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses 0   (36,278)
Other [member]      
Summary of expenses by nature administrative expenses [line items]      
Administrative expenses ₺ (126,677) ₺ (106,639) ₺ (100,526)