INVESTMENT IN HOTEL PROPERTIES - Summary of hotel properties sold (Details)			12 Months Ended
	Jul. 21, 2017 hotel	Apr. 27, 2017 hotel	Dec. 31, 2016 hotel Room	Dec. 31, 2017 Room
Business Acquisition [Line Items]
Number of guestrooms			749	2,442
Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of hotels sold | hotel			2
Disposed of by Sale
Business Acquisition [Line Items]
Number of hotels sold | hotel	3
Disposed of by Sale | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of hotels sold | hotel		7
Number of guestrooms				651
Disposed of by Sale | Jackson, MS | Courtyard by Marriott | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of guestrooms				117
Disposed of by Sale | Jackson, MS | Residence Inn | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of guestrooms				100
Disposed of by Sale | Germantown, TN | Courtyard by Marriott | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of guestrooms				93
Disposed of by Sale | Germantown, TN | Fairfield Inn & Suites | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of guestrooms				80
Disposed of by Sale | Germantown, TN | Residence Inn | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of guestrooms				78
Disposed of by Sale | Ridgeland, MS | Homewood Suites | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of guestrooms				91
Disposed of by Sale | Ridgeland, MS | Staybridge Suites | Portfolio of Hotels, Reinstatement Agreement, New ARCH Purchaser
Business Acquisition [Line Items]
Number of guestrooms				92