EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator
Net income attributable to Common Shareholders	$ 6,112	$ 13,776	$ 52,955	$ 56,818
Less: net income attributable to participating securities	(58)	(196)	(617)	(810)
Net income attributable to Common Shareholders, net of income attributable to participating securities	$ 6,054	$ 13,580	$ 52,338	$ 56,008
Denominator
Weighted average shares for basic earnings per share (in shares)	78,449	68,943	74,050	68,690
Effect of dilutive securities:
Employee Restricted Share Units and share options (in shares)	3	14	8	24
Incremental Common Shares Attributable to Dilutive Effect of Equity Forward Agreements	169	0	76	0
Convertible Preferred OP Units (in shares)	0	0	0	25
Denominator for diluted earnings per share (in shares)	78,621	68,957	74,134	68,739
Basic and diluted earnings per share (in dollars per share)	$ 0.08	$ 0.20	$ 0.71	$ 0.82