Commitments and Contingencies (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($) hotel	Dec. 31, 2018 USD ($)
Commitments and Contingencies (Textual) [Abstract]
Number of hotels operating pursuant to franchise agreements with hotel brand companies | hotel	10
Number of hotels operating pursuant to management agreements allowing them to operate under brand | hotel	10
Management Agreements [Member] | Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
General base management fee percentage of hotel revenues	4.00%
Management Agreements [Member] | Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
General base management fee percentage of hotel revenues	2.00%
Franchise Agreements [Member] | Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
General royalty fee percentage of room revenues	6.00%
General royalty fee percentage of food and beverage revenues	3.00%
General other franchisor fees percentage of room revenues	5.00%
Franchise Agreements [Member] | Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
General royalty fee percentage of room revenues	3.00%
General royalty fee percentage of food and beverage revenues	0.00%
General other franchisor fees percentage of room revenues	1.00%
FF&E Reserve [Member] | Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
Contribution percentage of gross revenues to reserve for hotel FF&E replacements	5.00%
FF&E Reserve [Member] | Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Contribution percentage of gross revenues to reserve for hotel FF&E replacements	3.00%
Hyatt Regency Mission Bay Spa and Marina [Member] | Ground Lease Agreement [Member]
Commitments and Contingencies (Textual) [Abstract]
Ground lease agreement expiration month year	January 2056
Ground lease annual base rent | $	$ 2.7	$ 2.3
Base rent reset frequency in years	3 years
Percentage of actual rent paid used to calculate base rent reset amount	75.00%
Number of years of actual rent paid used to calculate base rent reset amount	2 years
JW Marriott San Francisco Union Square [Member] | Ground Lease Agreement [Member]
Commitments and Contingencies (Textual) [Abstract]
Ground lease agreement expiration month year	January 2083
Ground lease annual base rent | $	$ 2.0	$ 1.7
Base rent reset frequency in years	5 years
Number of years used to determine level of inflation to calculate base rent reset amount	5 years
Percentage limit on base rent increase to calculate base rent reset amount	125.00%
Base rent fair market value reset month year	January 2034
Percentage of fair market value of land to calculate base rent reset amount	10.00%