Property, Plant, and Equipment - Schedule of loss (gain) on sale or write down of assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Property, Plant and Equipment [Line Items]
Write-down of assets	$ (29,608)	$ (36,703)
Gain (loss) on sale or write down of assets, net	(21,283)	(36,703)
Paradise Valley Mall
Property, Plant and Equipment [Line Items]
Gain on sales	1,334
Estrella Falls
Property, Plant and Equipment [Line Items]
Write-down of assets	(27,281)
Wilton Mall
Property, Plant and Equipment [Line Items]
Write-down of assets	(30,063)
Paradise Valley Mall
Property, Plant and Equipment [Line Items]
Write-down of assets		(6,640)
Property
Property, Plant and Equipment [Line Items]
Gain on sales	4,229	0
Land
Property, Plant and Equipment [Line Items]
Gain on sales	$ 4,096	$ 0