Supplemental Information to Statements of Cash Flows - Schedule of Supplemental Information to Statements of Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flows [Line Items]
Restricted cash reserves	$ 6,100		$ 3,200
Rangers Sub I, LLC
Supplemental Cash Flows [Line Items]
Cash and cash equivalents	12,695	$ 15,735	21,351
Restricted cash reserves	6,056	5,225	3,211
Cash, cash equivalents, and restricted cash reserves	18,751	20,960	$ 24,562	$ 18,031
Interest paid	20,518	38,069
Interest Paid, Related Party	3,105	0
Income taxes refunded	0	(1,742)
Operating Lease, Payments	6,332
Sale of hotel properties	147,377	441,200
Transaction costs	(1,682)	(7,034)
Operating prorations	(536)	195
Proceeds from Sale of Real Estate Held-for-investment	145,159	434,361
Accrued capital expenditures	$ 3,662	$ 2,566