Stockholders' Equity - Additional Information (Details)									1 Months Ended	3 Months Ended		9 Months Ended		13 Months Ended	98 Months Ended	236 Months Ended
	Aug. 02, 2022 USD ($) $ / shares shares	Feb. 06, 2019 USD ($)	Nov. 30, 2018	Oct. 30, 2018 USD ($) shares	Sep. 14, 2016 USD ($)	Dec. 14, 2015 USD ($)	Aug. 05, 2015 USD ($)	Apr. 08, 2004 $ / shares shares	Aug. 31, 2022 USD ($)	Sep. 30, 2023 $ / shares shares	Sep. 30, 2022 shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2023 shares	Dec. 31, 2022 $ / shares shares	Jun. 30, 2022 shares	Dec. 31, 2021 shares
Class Of Stock [Line Items]
Equity offerings of common stock | $	$ 30,000,000,000								$ 30,000,000				$ 30,000,000	$ 0		$ 2,240,067,000
Shares repurchased										0	0	198,084	189,127		15,593,120
Weighted-average price per share | $ / shares												$ 11.6	$ 12.73		$ 15.91
Cost of Shares Repurchased | $		$ 48,107,000		$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000					$ 248,107,000
Cost of Shares Repurchased | $												$ 2,297,000	$ 2,407,000		$ 248,107,000
Discount rate of average net asset value per share												23.63%	18.39%
Reverse stock split, conversion ratio				0.0033
Reverse stock split, description			The Company’s Board of Directors approved a one-for-three reverse stock split of the Company’s common stock on October 30, 2018, which was effective as of close of business as of November 30, 2018 (the “Reverse Stock Split”).
Number of shares, reverse stock splits								20,700,000
Common stock, shares authorized										130,000,000		130,000,000		130,000,000	130,000,000	130,000,000		130,000,000
Common stock, par value | $ / shares	$ 0.001									$ 0.001		$ 0.001		$ 0.001	$ 0.001	$ 0.001		$ 0.001
Common stock, shares issued	1,932,641									65,253,275	65,451,359	65,253,275	65,451,359	65,253,275	65,253,275	65,253,275	65,253,275	65,451,359	63,518,718	63,707,845
Share purchase price par value | $ / shares	$ 15.52							$ 15
Lock up period	2 years
Offering cost | $	$ 300,000,000
Common Stock
Class Of Stock [Line Items]
Reverse stock split, conversion ratio				0.0033
Reverse stock split, description				On October 30, 2018, the Company’s Board of Directors approved a one-for-three reverse stock split of the Company’s common stock which was effective as of the close of business on November 30, 2018.
Fractional Shares
Class Of Stock [Line Items]
Shares repurchased															15,593,150
Weighted-average price per share | $ / shares															$ 15.91
Cost of Shares Repurchased inclusive commissions | $															$ 248,107,000
Number of shares, reverse stock splits				29