EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Numerator
Income from continuing operations	$ 13,776	$ 28,564	$ 56,818	$ 61,524
Less: net income attributable to participating securities	(196)	(490)	(810)	(1,083)
Income from continuing operations, net of income attributable to participating securities	$ 13,580	$ 28,074	$ 56,008	$ 60,441
Denominator
Weighted average shares for basic earnings per share (in shares)	68,943	59,686	68,690	57,898
Effect of dilutive securities:
Employee Restricted Share Units and share options (in shares)	14	18	24	26
Convertible Preferred OP Units (in shares)	0	25	25	25
Denominator for diluted earnings per share (in shares)	68,957	59,729	68,739	57,949
Basic and diluted earnings per share	$ 0.20	$ 0.47	$ 0.82	$ 1.04