Summary of Significant Accounting Policies - Impairments of Investments in Real Estate (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge				2018-06
Impairment	$ 4,457	$ 18,307	$ 18,873	$ 18,307
Courtyard Pensacola Florida Property [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-03
Impairment			$ 937
Hilton Garden Inn Saratoga Springs New York Property [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-03
Impairment			$ 5,927
Homewood Suites Fort Worth Texas Property [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-03
Impairment			$ 3,969
Residence Inn Pittsburgh Pennsylvania [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge				2018-06
Impairment				$ 13,605
Hilton Garden Inn - McAllen, Texas Property [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-03	2018-06
Impairment			$ 3,583	$ 4,702
Hampton Inn Foothill Ranch California Property [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-06
Impairment			$ 336
Hilton Garden Inn Foothill Ranch California [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-06
Impairment			$ 588
Homewood Suites Fort Worth Texas Property1 [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-06
Impairment			$ 2,260
Hilton Garden Inn Bakersfield California Property [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Date of Impairment Charge			2019-06
Impairment			$ 1,273