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Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Sep. 30, 2018
Mar. 31, 2018
Related Party Transaction [Line Items]      
Total interest payments $ 14,000   $ 20,000
Mr. Glenn Alba [Member]      
Related Party Transaction [Line Items]      
Due to Related Parties   $ 8  
Previously Managed Hotels [Member]      
Related Party Transaction [Line Items]      
Purchase products and services from affiliates 100   $ 300
Senior Secured Term Loan Facility [Member] | Blackstone [Member]      
Related Party Transaction [Line Items]      
Senior secured credit facility   518,000  
Total interest payments subordinate risk retension interest 99,000    
Total interest payments $ 2,000    
Contributed for loan asset securitization   518,000  
Investment in asset securitization subordinate risk interest amount   $ 99,000  
Blackstone [Member]      
Related Party Transaction [Line Items]      
Equity method investment ownership percentage 30.00%