Dividends (Distributions) - Schedule of Common Stock Distribution Per Share (Details) - $ / shares		12 Months Ended
		Dec. 31, 2020		Dec. 31, 2019	[2]	Dec. 31, 2018
Payments Of Dividends [Abstract]
Ordinary dividends		$ 0.52	[1]	$ 0.97		$ 1.53
Capital gain distribution	[1]	0.08
Non-dividend distributions						0.87
Total		$ 0.60	[1]	$ 0.97		$ 2.40

[1] Pursuant to Internal Revenue Code Section 857(b)(9), if you were a stockholder of record as of December 15, 2020, your dividend payment of $0.1500 per share received in January 2021 was reported on Form 1099-DIV for the 2020 taxable year for federal income tax purposes.

[2] Pursuant to Internal Revenue Code Section 857(b)(9), if you were a stockholder of record as of December 31, 2019, your dividend payment of $0.2200 per share received in January 2020 was reported on Form 1099-DIV for the 2019 taxable year for federal income tax purposes.