Fair Value Measurements - Summary of Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financial assets:
Preferred equity investment - face value		$ 2,327
Mortgage Receivable [Member]
Financial assets:
Mortgage loans receivable - face value		29,500
Senior unsecured notes payable
Financial liabilities:
Senior unsecured notes payable - face value	$ 300,000	300,000
Carrying Amount | Level 2 | Senior unsecured notes payable
Financial liabilities:
Senior unsecured notes payable	296,100	295,911
Carrying Amount | Level 3
Financial assets:
Preferred equity investments		3,800
Carrying Amount | Level 3 | Mortgage Receivable [Member]
Financial assets:
Mortgage loans receivable		29,500
Fair Value | Level 2 | Senior unsecured notes payable
Financial liabilities:
Senior unsecured notes payable	$ 295,500	312,750
Fair Value | Level 3
Financial assets:
Preferred equity investments		3,674
Fair Value | Level 3 | Mortgage Receivable [Member]
Financial assets:
Mortgage loans receivable		$ 29,500