Subsequent Events - Narrative - Distributions Declared (Details) - $ / shares			3 Months Ended
	Mar. 20, 2018	Mar. 13, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Mar. 13, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Common share, distribution rate per share per day, declared (in dollars per share)		$ 0.00151890410958904	$ 0.001519	$ 0.001683	$ 0.001964
Subsequent Event [Member]
Subsequent Event [Line Items]
Share price (in dollars per share)						$ 9.40349170419484
Common Stock [Member]
Subsequent Event [Line Items]
Common share, distribution rate per share per day, declared (in dollars per share)			$ 0.001519		$ 0.001964
Common stock, distribution rate, percentage	6.00%		6.00%	6.00%	7.00%
Share price (in dollars per share)		$ 9.24		$ 10.24	$ 10.24		$ 9.24