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Notes Receivable, Net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Proceeds from notes receivable	$ 15,250	$ 26,000	$ 32,000
Note receivable exchanged for sale of real estate	13,530
Additional advance	326,268	187,173	$ 156,344
Core Portfolio
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Proceeds from notes receivable		26,000
Note receivable accrued interest		200
Additional advance	4,300
Mortgage loans on real estate interest until maturity	400
Note receivable including accrued interest	20,800
Core Portfolio | Note Receivable Due April 1, 2020
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Proceeds from notes receivable		15,000
Additional advance		2,800
Core Portfolio | Town Center
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Note receivable accrued interest		300
Note receivable exchanged		22,000
Pacesetter Park
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Note receivable exchanged for sale of real estate	$ 13,500
Effective interest rate	5.10%
Fund IV
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Proceeds from notes receivable	$ 15,300
Note receivable accrued interest	10,000
Fund II
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Note receivable accrued interest	400	800
Fund III
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Note receivable accrued interest	$ 4,700	4,700
Additional advance		$ 200

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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