INVESTMENT IN HOTEL PROPERTIES, NET - Summary of hotel properties acquired (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Purchase Price	$ 421,950	$ 170,400
Net assets acquired	424,773	169,654
Settlement amount of net working capital assets	600
Other assets and capitalized transaction costs	2,200
Settlement amount of net liabilities		700
Homewood Suites | Aliso Viejo (Laguna Beach), CA
Business Acquisition [Line Items]
Purchase Price	38,000
Hyatt Place | Phoenix (Mesa), AZ
Business Acquisition [Line Items]
Purchase Price	22,200
Courtyard by Marriott | Fort Lauderdale, FL
Business Acquisition [Line Items]
Purchase Price	85,000
Courtyard by Marriott | Charlotte, NC
Business Acquisition [Line Items]
Purchase Price	56,250
Courtyard by Marriott | Fort Worth, TX
Business Acquisition [Line Items]
Purchase Price	40,000
Courtyard by Marriott | Kansas City, MO
Business Acquisition [Line Items]
Purchase Price	24,500
Courtyard by Marriott | Pittsburgh, PA
Business Acquisition [Line Items]
Purchase Price	42,000
Courtyard by Marriott | Nashville, TN
Business Acquisition [Line Items]
Purchase Price		71,000
Hampton Inn & Suites | Baltimore, MD
Business Acquisition [Line Items]
Purchase Price	18,000
Residence Inn by Marriott | Baltimore, MD
Business Acquisition [Line Items]
Purchase Price	38,500
Residence Inn by Marriott | Atlanta, GA
Business Acquisition [Line Items]
Purchase Price		38,000
AC Hotel by Marriott | Atlanta, GA
Business Acquisition [Line Items]
Purchase Price	$ 57,500
Marriott | Boulder, CO
Business Acquisition [Line Items]
Purchase Price		$ 61,400