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13. Investment properties (Tables) | 12 Months Ended
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Dec. 31, 2018
Investment Properties Tables Abstract |
Investment properties |
| December 31, 2017 | Write-offs and disposals | Transfers | Depreciation | December 31, 2018
Investment properties | 57,652 | (9,995) | 13 | (50) | 47,620
Total | 57,652 | (9,995) | 13 | (50) | 47,620
| December 31, 2016 | Write-offs and disposals | Depreciation | December 31, 2017
Investment properties | 57,968 | (244) | (72) | 57,652
Total | 57,968 | (244) | (72) | 57,652
| December 31, 2015 | Transfers | Write-offs and disposals | Reversal of estimated losses | Depreciation | December 31, 2016
Investment properties | 56,957 | 1,231 | (124) | 10 | (106) | 57,968
Total | 56,957 | 1,231 | (124) | 10 | (106) | 57,968

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