Financing Arrangement - Narrative (Details) ft² in Thousands, $ in Thousands			6 Months Ended
	Jun. 27, 2019 USD ($)	Sep. 30, 2009 ft²	Jun. 30, 2020 USD ($) $ / ft²	Jun. 30, 2019 USD ($)	Dec. 31, 2019 $ / ft²
Schedule of Joint Ventures [Line Items]
Terminal capitalization rate			5.50%		5.00%
Discount rate			7.00%		6.00%
Distributions, pro rata share of the excess loan proceeds | $	$ 27,945		$ 0	$ 27,944
Chandler Fashion Center
Schedule of Joint Ventures [Line Items]
Additional borrowing | $	$ 256,000
Financing Arrangement | Minimum
Schedule of Joint Ventures [Line Items]
Market rent per square foot | $ / ft²			35		35
Financing Arrangement | Maximum
Schedule of Joint Ventures [Line Items]
Market rent per square foot | $ / ft²			115		115
Financing Arrangement | Chandler Freehold
Schedule of Joint Ventures [Line Items]
Percentage of loan assumed by third party		49.90%
Financing Arrangement | Chandler Fashion Center
Schedule of Joint Ventures [Line Items]
Property area (in square feet) | ft²		1,318
Financing Arrangement | Freehold Raceway Mall
Schedule of Joint Ventures [Line Items]
Property area (in square feet) | ft²		1,673