Other Data - Characterization of Distributions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Characterization of distributions on common stock
Ordinary income (in dollars per share)	$ 0.75	$ 0.77	$ 0.79
Return of capital (in dollars per share)	0.36	0.11	0.40
Unrecaptured section 1250 gain (in dollars per share)	0.10	0.32	0.01
Common stock distributions (in dollars per share)	$ 1.21	$ 1.20	$ 1.20
Ordinary income in percent of common stock distribution	62.00%	64.50%	65.70%
Return of capital in percent of common stock distribution	8.00%	9.00%	33.90%
Unrecaptured section 1250 gain in percent of common stock distribution	30.00%	26.50%	0.40%
Common stock distribution in percentage	100.00%	100.00%	100.00%