HOTEL PROPERTY ACQUISITIONS (Details) $ in Thousands		9 Months Ended
	Jan. 10, 2014 USD ($) shares	Sep. 30, 2015 USD ($) property	Sep. 30, 2014 USD ($)	Jun. 02, 2015 property
Hotels
Hotel property acquisitions
Number of hotels | property		95
Portfolio of Hotels, ARCH Agreements
Hotel property acquisitions
Number of hotels | property				26
2015 acquisitions
Hotel property acquisitions
Purchase Price		$ 154,751
2015 acquisitions | Hampton Inn & Suites | Minneapolis, MN
Hotel property acquisitions
Purchase Price		38,951
2015 acquisitions | Hampton Inn | Boston (Norwood), MA
Hotel property acquisitions
Purchase Price		24,000
2015 acquisitions | Hotel Indigo | Asheville, NC
Hotel property acquisitions
Purchase Price		35,000
2015 acquisitions | Residence Inn | Branchburg, NJ
Hotel property acquisitions
Purchase Price		25,700
2015 acquisitions | Residence Inn | Hunt Valley, MD
Hotel property acquisitions
Purchase Price		$ 31,100
2014 acquisitions
Hotel property acquisitions
Purchase Price			$ 214,710
Debt Assumed			43,172
2014 acquisitions | Hampton Inn & Suites | Austin, TX
Hotel property acquisitions
Purchase Price			53,000
2014 acquisitions | Hampton Inn | Santa Barbara (Goleta), CA
Hotel property acquisitions
Purchase Price			27,900
Debt Assumed			12,037
2014 acquisitions | Hilton Garden Inn | Houston (Galleria), Texas
Hotel property acquisitions
Purchase Price			37,500
Debt Assumed			17,846
2014 acquisitions | Hilton Garden Inn | Houston (Energy Corridor), TX
Hotel property acquisitions
Purchase Price			36,000
2014 acquisitions | Four Points by Sheraton | South San Francisco, CA
Hotel property acquisitions
Purchase Price			21,250
2014 acquisitions | Double Tree by Hilton | San Francisco, CA
Hotel property acquisitions
Purchase Price			39,060
Debt Assumed			$ 13,289
Operating partnership | 2014 acquisitions | Hampton Inn | Santa Barbara (Goleta), CA | Partnership interest
Hotel property acquisitions
Common units issued for acquisition (in shares) | shares	412,174
Common units issued for acquisition	$ 3,700