Business Combinations and Acquisition and Disposition of Hotel Properties - Disposition of Hotel Properties (Details) - USD ($)					3 Months Ended			6 Months Ended
	Jul. 16, 2019	May 29, 2019	Feb. 22, 2019	Feb. 14, 2019	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of hotel properties								$ 302,323,000	$ 0
Operating (loss) income from disposed properties						$ 1,100,000	$ 1,300,000	$ 1,500,000	$ 2,200,000
The Liaison Capitol Hill
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of hotel properties				$ 111,000,000.0
Gain (loss) on sale of hotel properties				$ 0
Hotel Palomar Washington DC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of hotel properties			$ 141,500,000
Gain (loss) on sale of hotel properties			$ 0
Onyx Hotel
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of hotel properties		$ 58,300,000
Gain (loss) on sale of hotel properties		$ 0
Hotel Amarano Burbank | Subsequent event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of hotel properties	$ 72,900,000
Rouge Hotel | Scenario, Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sales of hotel properties					$ 42,000,000.0