Income Taxes - Distributions (Details) - $ / shares		12 Months Ended
	Dec. 15, 2020	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Common Shares
Real Estate Investment Trust Distributions [Line Items]
Ordinary non-qualified income (in usd per share)		$ 0.0400	$ 0.0419	$ 0
Ordinary non-qualified income, percent		100.00%	83.80%	0.00%
Qualified dividend (in usd per share)		$ 0	$ 0	$ 0
Qualified dividend, percent		0.00%	0.00%	0.00%
Capital gain (in usd per share)		$ 0	$ 0.0081	$ 0.0128
Capital gain, percent		0.00%	16.20%	32.00%
Return of capital (in usd per share)		$ 0	$ 0	$ 0.0272
Return of capital, percent		0.00%	0.00%	68.00%
Total (in usd per share)		$ 0.0400	$ 0.0500	$ 0.0400
Total, percent		100.00%	100.00%	100.00%
Distributions declared, treated as distributions for taxes in next year (in usd per share)	$ 0.0100
Series C Cumulative Redeemable Preferred Shares
Real Estate Investment Trust Distributions [Line Items]
Ordinary non-qualified income (in usd per share)		$ 0	$ 0	$ 0
Ordinary non-qualified income, percent		0.00%	0.00%	0.00%
Qualified dividend (in usd per share)		$ 0	$ 0	$ 0
Qualified dividend, percent		0.00%	0.00%	0.00%
Capital gain (in usd per share)		$ 0	$ 0	$ 0.1725
Capital gain, percent		0.00%	0.00%	12.45%
Return of capital (in usd per share)		$ 0	$ 0	$ 1.2133
Return of capital, percent		0.00%	0.00%	87.55%
Total (in usd per share)		$ 0	$ 0	$ 1.3858
Total, percent		0.00%	0.00%	100.00%
Series D Cumulative Redeemable Preferred Shares
Real Estate Investment Trust Distributions [Line Items]
Ordinary non-qualified income (in usd per share)		$ 0	$ 0	$ 0
Ordinary non-qualified income, percent		0.00%	0.00%	0.00%
Qualified dividend (in usd per share)		$ 0	$ 0	$ 0
Qualified dividend, percent		0.00%	0.00%	0.00%
Capital gain (in usd per share)		$ 0	$ 0	$ 0.1692
Capital gain, percent		0.00%	0.00%	12.49%
Return of capital (in usd per share)		$ 0	$ 0	$ 1.1855
Return of capital, percent		0.00%	0.00%	87.51%
Total (in usd per share)		$ 0	$ 0	$ 1.3547
Total, percent		0.00%	0.00%	100.00%
Series E Cumulative Redeemable Preferred Shares
Real Estate Investment Trust Distributions [Line Items]
Ordinary non-qualified income (in usd per share)		$ 1.5938	$ 1.6684	$ 0
Ordinary non-qualified income, percent		100.00%	83.75%	0.00%
Qualified dividend (in usd per share)		$ 0	$ 0	$ 0
Qualified dividend, percent		0.00%	0.00%	0.00%
Capital gain (in usd per share)		$ 0	$ 0.3238	$ 0.5118
Capital gain, percent		0.00%	16.25%	32.11%
Return of capital (in usd per share)		$ 0	$ 0	$ 1.0819
Return of capital, percent		0.00%	0.00%	67.89%
Total (in usd per share)		$ 1.5938	$ 1.9922	$ 1.5937
Total, percent		100.00%	100.00%	100.00%
Series F Cumulative Redeemable Preferred Shares
Real Estate Investment Trust Distributions [Line Items]
Ordinary non-qualified income (in usd per share)		$ 1.5750	$ 1.6488	$ 0
Ordinary non-qualified income, percent		100.00%	83.75%	0.00%
Qualified dividend (in usd per share)		$ 0	$ 0	$ 0
Qualified dividend, percent		0.00%	0.00%	0.00%
Capital gain (in usd per share)		$ 0	$ 0.3200	$ 0.5058
Capital gain, percent		0.00%	16.25%	32.11%
Return of capital (in usd per share)		$ 0	$ 0	$ 1.0692
Return of capital, percent		0.00%	0.00%	67.89%
Total (in usd per share)		$ 1.5750	$ 1.9688	$ 1.5750
Total, percent		100.00%	100.00%	100.00%
Series G Cumulative Redeemable Preferred Shares, $0.01 par value
Real Estate Investment Trust Distributions [Line Items]
Ordinary non-qualified income (in usd per share)		$ 1.5938	$ 1.6684	$ 0
Ordinary non-qualified income, percent		100.00%	83.75%	0.00%
Qualified dividend (in usd per share)		$ 0	$ 0	$ 0
Qualified dividend, percent		0.00%	0.00%	0.00%
Capital gain (in usd per share)		$ 0	$ 0.3238	$ 0.5787
Capital gain, percent		0.00%	16.25%	86.00%
Return of capital (in usd per share)		$ 0	$ 0	$ 0.0942
Return of capital, percent		0.00%	0.00%	14.00%
Total (in usd per share)		$ 1.5938	$ 1.9922	$ 0.6729
Total, percent		100.00%	100.00%	100.00%
Series H Cumulative Redeemable Preferred Shares, $0.01 par value
Real Estate Investment Trust Distributions [Line Items]
Ordinary non-qualified income (in usd per share)		$ 1.4250	$ 1.4917	$ 0
Ordinary non-qualified income, percent		100.00%	83.75%	0.00%
Qualified dividend (in usd per share)		$ 0	$ 0	$ 0
Qualified dividend, percent		0.00%	0.00%	0.00%
Capital gain (in usd per share)		$ 0	$ 0.2895	$ 0.2655
Capital gain, percent		0.00%	16.25%	86.01%
Return of capital (in usd per share)		$ 0	$ 0	$ 0.0432
Return of capital, percent		0.00%	0.00%	13.99%
Total (in usd per share)		$ 1.4250	$ 1.7812	$ 0.3087
Total, percent		100.00%	100.00%	100.00%