CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Storage facilities, net	$ 3,056,841	$ 2,872,983
Series A Preferred shares, percentage	7.75%	7.75%
Series A Preferred shares, par value (in dollars per share)	$ 0.01	$ 0.01
Series A Preferred shares, shares authorized	3,220,000	3,220,000
Series A Preferred shares, shares issued	3,100,000	3,100,000
Series A Preferred shares, shares outstanding	3,100,000	3,100,000
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, shares authorized	400,000,000	400,000,000
Common shares, shares issued	177,126,709	174,667,870
Common shares, shares outstanding	177,126,709	174,667,870
VIE
Storage facilities, net	$ 169,141	$ 136,274