Dividends Declared and Paid (Details) - $ / shares							3 Months Ended			6 Months Ended
	Jun. 29, 2018	May 31, 2018	Apr. 30, 2018	Mar. 29, 2018	Feb. 28, 2018	Jan. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Equity [Abstract]
Common shares, dividend declared per share (in dollars per share)	$ 0.11	$ 0.11	$ 0.11	$ 0.11	$ 0.11	$ 0.11	$ 0.33	$ 0.33	$ 0.33	$ 0.66	$ 0.66
LTIP units, distributions per unit (in dollars per share)	$ 0.11	$ 0.11	$ 0.11	$ 0.11	$ 0.11	$ 0.11	$ 0.33	$ 0.33		$ 0.66	$ 0.66