Income Taxes and Distributions - Cash Distributions Paid to Common Stockholders for Federal Income Tax Purposes (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Per share:
Ordinary dividend (in USD per share)	$ 1.4828	$ 1.6389	$ 2.6937
Long-term capital gain/(loss) (in USD per share)	0.8371	1.0611	0.7863
Return of capital (in USD per share)	0.1201	0	0
Totals (in USD per share)	2.44	2.70	3.48
Section 199A dividend included in ordinary dividend (in USD per share)	1.4828	1.6389	2.6937
Gains 1250 per share (in USD per share)	$ 0.4523	$ 0.3458	$ 0.2835