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26. Income tax (Details 2) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Details 2Abstract |  |  |  |
Deferred tax |  | $ (759,849) | $ 255,285 | $ 342,403
Current tax |  | (1,114,384) | (760,641) | (484,887)
Difference between provision and tax return |  | (3,163) | (4,700) | (4,786)
Income tax expense |  | (1,877,396) | (510,056) | (147,270)
Profit for the year before taxes |  | $ 6,174,862 | $ 5,590,691 | $ 388,041
Applicable tax rate |  | 30.00% | 35.00% | 35.00%
Loss for the year at the tax rate |  | $ (1,852,459) | $ (1,956,742) | $ (135,814)
Gain (loss) from interest in joint ventures |  | 560 | (6) | (3)
Non-taxable income |  | 220,769 | 115,661 | 138,040
Gain on net monetary position and others |  | (1,007,010) | 902,631 | (144,707)
Difference between provision and tax return |  | (3,163) | (4,700) | (4,786)
Change in the income tax rate | [1] | 763,907 | 433,100 | 0
Income tax expense |  | $ (1,877,396) | $ (510,056) | $ (147,270)
[1] | Refers to the effect of applying to deferred tax assets and liabilities the changes in income tax rates in accordance with the previously detailed tax reform on the basis of the year in which they are expected to be realized/settled.

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