Equity (Details) (Common Shares [Member], USD $)	3 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Common Shares [Member]
Dividends on common shares/units
Dividend per Share/Unit	$ 0.23	$ 0.23	$ 0.23	$ 0.23
Record Date	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Payable Date	Jan. 15, 2015	Oct. 15, 2014	Jul. 15, 2014	Apr. 15, 2014