EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator
Income from continuing operations	$ 26,495	$ 11,365	$ 43,042	$ 32,960
Less: net income attributable to participating securities	(238)	(197)	(478)	(585)
Income from continuing operations, net of income attributable to participating securities	$ 26,257	$ 11,168	$ 42,564	$ 32,375
Denominator
Weighted average shares for basic earnings per share (in shares)	68,825	58,013	68,561	56,989
Effect of dilutive securities:
Employee Restricted Share Units and share options (in shares)	19	19	30	28
Convertible Preferred OP Units (in shares)	25	0	25	25
Denominator for diluted earnings per share (in shares)	68,869	58,032	68,616	57,042
Earnings Per Share, Basic, Undistributed	$ 0.38	$ 0.19	$ 0.62	$ 0.57