Acquired Properties - Schedule of Retail Properties Acquired (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) VIE ft²	Dec. 31, 2018 USD ($) VIE ft²
Business Acquisition [Line Items]
Number of VIEs used to facilitate acquisition | VIE	0
Retail
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 365,764	$ 222,600
Square Feet | ft²	977,400	470,000
Number of VIEs used to facilitate acquisition | VIE		3
Retail | Commons at University Place
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 23,250
Square Feet | ft²	92,000
Retail | Lakeside Winter Park and Lakeside Crossings
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 63,500
Square Feet | ft²	76,000
Retail | Scofield Crossing
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 3,000
Square Feet | ft²	64,000
Retail | Tomball Town Center Kroger
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 13,992
Square Feet | ft²	74,000
Retail | Sandy Plains Outparcel
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 2,900
Square Feet | ft²	6,000
Retail | Shops at Fairview Town Center
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 36,000
Square Feet | ft²	67,500
Retail | Southern Palm Crossing
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 96,750
Square Feet | ft²	346,200
Retail | Travilah Square
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 52,272
Square Feet | ft²	58,300
Retail | Eldorado Marketplace
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 70,850
Square Feet | ft²	189,500
Retail | Garden Village Outparcel
Business Acquisition [Line Items]
Gross Acquisition Price | $	$ 3,250
Square Feet | ft²	3,900
Retail | PGA Plaza
Business Acquisition [Line Items]
Gross Acquisition Price | $		$ 88,000
Square Feet | ft²		120,000
Retail | Kennesaw Marketplace
Business Acquisition [Line Items]
Gross Acquisition Price | $		$ 64,300
Square Feet | ft²		117,000
Retail | Kennesaw Marketplace, Phase 3
Business Acquisition [Line Items]
Gross Acquisition Price | $		$ 7,500
Square Feet | ft²		13,000
Retail | Peachland Promenade, Phase 2
Business Acquisition [Line Items]
Gross Acquisition Price | $		$ 18,700
Square Feet | ft²		95,000
Retail | Sandy Plains Centre
Business Acquisition [Line Items]
Gross Acquisition Price | $		$ 44,100
Square Feet | ft²		125,000