INVESTMENT IN HOTEL PROPERTIES, NET - Total revenue and net income for hotel properties acquired (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Real estate tax expense, depreciation expense, interest expense, and other corporate expenses	$ 46,200	$ 34,300	$ 124,300	$ 110,900
2017 acquisitions
Business Acquisition [Line Items]
Revenues	20,913		28,283
Net income	1,960		3,816
Real estate tax expense, depreciation expense, interest expense, and other corporate expenses	7,000		8,500
2016 acquisitions
Business Acquisition [Line Items]
Revenues	9,233	8,071	25,929	18,582
Net income	1,734	2,568	4,965	5,284
Real estate tax expense, depreciation expense, interest expense, and other corporate expenses	$ 3,000	$ 1,900	$ 8,200	$ 4,600