Property, Plant, and Equipment - Schedule of Loss (Gain) on Sale or Write down of Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Write-down of assets	$ (36,703)	$ (6,850)
(Loss) gain on sale or write down of assets, net	(36,703)	(6,316)
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)
Land
Property, Plant and Equipment [Line Items]
Gain on sale	$ 0	$ 534