INVESTMENT IN HOTEL PROPERTIES, NET - Pro forma financial information (Details) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($) hotel $ / shares	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2017 USD ($) hotel $ / shares	Jun. 30, 2016 USD ($) $ / shares
Business Combinations [Abstract]
Number of hotels owed | hotel	81		81
Revenues	$ 140,830	$ 144,572	$ 271,750	$ 274,072
Income from hotel operations	54,639	59,192	103,388	109,051
Net income before taxes	23,515	29,593	44,409	50,908
Net income	23,092	29,458	43,565	49,202
Net income attributable to common stockholders, net of amount allocated to participating securities	$ 18,694	$ 25,126	$ 34,785	$ 40,606
Basic net income per share attributable to common shareholders (in dollars per share) | $ / shares	$ 0.19	$ 0.29	$ 0.36	$ 0.47
Diluted net income per share attributable to common shareholders (in dollars per share) | $ / shares	$ 0.19	$ 0.29	$ 0.36	$ 0.47