Income Taxes - Summary of Average Taxable Nature of Dividends (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Stock
Income Tax Contingency [Line Items]
Total dividends per share, common (usd per share)	$ 0.430	$ 0.420	$ 0.485
Taxable percentage allocation on dividends	100.00%	100.00%	100.00%
Common Stock | Ordinary income
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	65.89%	95.10%	61.07%
Common Stock | Qualifying dividend
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.10%	0.60%	0.22%
Common Stock | Capital gain
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.00%	0.00%	0.00%
Common Stock | Return of capital
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	34.01%	4.30%	38.71%
Series C
Income Tax Contingency [Line Items]
Total dividends per share, preferred (usd per share)	$ 3.25	$ 3.25	$ 3.25
Taxable percentage allocation on dividends	100.00%	100.00%	100.00%
Series C | Ordinary income
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	99.84%	99.38%	99.64%
Series C | Qualifying dividend
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.16%	0.62%	0.36%
Series C | Capital gain
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.00%	0.00%	0.00%
Series C | Return of capital
Income Tax Contingency [Line Items]
Taxable percentage allocation on dividends	0.00%	0.00%	0.00%