Equity (Details) - Common Shares [Member] - $ / shares	3 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Dividends on common shares/units
Dividend per Share/Unit (usd per share)	$ 0.31	$ 0.31	$ 0.31	$ 0.31
Record Date	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Payable Date	Jan. 15, 2016	Oct. 15, 2015	Jul. 15, 2015	Apr. 15, 2015