Distributions Paid and Payable - Distributions to Common Stockholders (Details) - $ / shares	1 Months Ended																																					12 Months Ended
	Jan. 31, 2022	Dec. 31, 2021	Nov. 30, 2021	Oct. 31, 2021	Sep. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Jan. 31, 2021	Dec. 31, 2020	Nov. 30, 2020	Oct. 31, 2020	Sep. 30, 2020	Aug. 31, 2020	Jul. 31, 2020	Jun. 30, 2020	May 31, 2020	Apr. 30, 2020	Mar. 31, 2020	Feb. 29, 2020	Jan. 31, 2020	Dec. 31, 2019	Nov. 30, 2019	Oct. 31, 2019	Sep. 30, 2019	Aug. 31, 2019	Jul. 31, 2019	Jun. 30, 2019	May 31, 2019	Apr. 30, 2019	Mar. 31, 2019	Feb. 28, 2019	Jan. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Distributions Paid and Payable
Distributions paid per common share (in dollars per share)		$ 0.2460	$ 0.2360	$ 0.2360	$ 0.2355	$ 0.2355	$ 0.2355	$ 0.2350	$ 0.2350	$ 0.2350	$ 0.2345	$ 0.2345	$ 0.2345	$ 0.2340	$ 0.2340	$ 0.2340	$ 0.2335	$ 0.2335	$ 0.2335	$ 0.2330	$ 0.2330	$ 0.2330	$ 0.2325	$ 0.2325	$ 0.2275	$ 0.2270	$ 0.2270	$ 0.2270	$ 0.2265	$ 0.2265	$ 0.2265	$ 0.2260	$ 0.2260	$ 0.2260	$ 0.2255	$ 0.2255	$ 0.2210	$ 2.8330	$ 2.7940	$ 2.7105
Distributions payable (in dollars per share)		$ 0.2465												$ 0.2345																								$ 0.2465	$ 0.2345
Subsequent event
Distributions Paid and Payable
Distributions paid per common share (in dollars per share)	$ 0.2465