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13 Investment properties (Tables)

12 Months Ended

Dec. 31, 2020

Investment property [abstract]

Schedule of investment properties

	December 31, 2019	Transfers	Depreciation	December 31, 2020
Investment properties	47,562	(1,240)	(48)	46,274

	December 31,  2018		Transfers		Depreciation		December 31,  2019
Investment properties	47,620		(9)		(49)		47,562

	December 31, 2017		Write-offs and disposals		Transfers		Depreciation		December 31, 2018
Investment properties	57,652		(9,995)		13		(50)		47,620

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