Distributions Paid and Payable (Details) - $ / shares	1 Months Ended													6 Months Ended
	Jul. 31, 2021	Jun. 30, 2021	May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Feb. 28, 2021	Jan. 31, 2021	Jun. 30, 2020	May 31, 2020	Apr. 30, 2020	Mar. 31, 2020	Feb. 29, 2020	Jan. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Distributions Paid and Payable
Distributions paid per common share (in dollars per share)		$ 0.2350	$ 0.2350	$ 0.2350	$ 0.2345	$ 0.2345	$ 0.2345	$ 0.2330	$ 0.2330	$ 0.2330	$ 0.2325	$ 0.2325	$ 0.2275	$ 1.4085	$ 1.3915
Distributions payable (in dollars per share)		$ 0.2355												$ 0.2355
Subsequent event
Distributions Paid and Payable
Distributions paid per common share (in dollars per share)	$ 0.2355