REVENUE FROM CONTRACTS WITH CUSTOMERS - Disaggregation of Revenues from Franchised and Managed Hotels (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 323,657	$ 336,501	$ 601,326	$ 634,268
Management fees
Disaggregation of Revenue [Line Items]
Revenue	367	343	660	541
Franchise fees
Disaggregation of Revenue [Line Items]
Revenue	1,080	518	2,012	735
Indirect reimbursements (system services fees)
Disaggregation of Revenue [Line Items]
Revenue	1,400	563	2,584	771
Direct reimbursements
Disaggregation of Revenue [Line Items]
Revenue	3,126	2,637	6,037	4,296
Total revenues from franchised and managed hotels
Disaggregation of Revenue [Line Items]
Revenue	$ 5,973	$ 4,061	$ 11,293	$ 6,343

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration