Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisition of Hotel Properties - Narrative (Details) - USD ($) $ in Millions			6 Months Ended	12 Months Ended
	Dec. 05, 2018	Aug. 27, 2018	Jun. 30, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Property acquisition costs capitalized			$ 0.0	$ 0.2
RI Summerville
Business Acquisition [Line Items]
Consideration transferred		$ 20.8
Dallas DT
Business Acquisition [Line Items]
Consideration transferred	$ 49.0