Equity - Preferred Stock and Convertible Stock (Details)	9 Months Ended
	Sep. 30, 2020 event $ / shares shares	Jun. 30, 2020 shares	Mar. 31, 2020 shares	Dec. 31, 2019 $ / shares shares	Sep. 30, 2019 shares	Jun. 30, 2019 shares	Mar. 31, 2019 shares	Dec. 31, 2018 shares
Class Of Stock [Line Items]
Preferred stock, shares authorized (in shares)	10,000,000			10,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01			$ 0.01
Preferred stock, shares issued (in shares)	0			0
Preferred stock, shares outstanding (in shares)	0			0
Common stock, shares outstanding (in shares)	60,206,977			60,094,623
Common stock, par value (in dollars per share) | $ / shares	$ 0.01			$ 0.01
Non-compounded annual return, option 2 (as percent)	7.00%
Number of possible triggering events | event	2
Conversion basis	0.00002
Converted if the lesser of, option 2 (as percent)	15.00%
Number of triggering events | event	0
Convertible Stock
Class Of Stock [Line Items]
Common stock, shares outstanding (in shares)	50,000	50,000	50,000	50,000	50,000	50,000	50,000	50,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01			$ 0.01
Common stock, conversion terms, percent of paid distributions equal to price at which shares were originally sold	100.00%
Percent of annual return on shares at price equal to distributions paid	7.00%
Convertible Stock | Advisor
Class Of Stock [Line Items]
Common stock, shares outstanding (in shares)	50,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.01