Preferred Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		9 Months Ended
	May 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Class Of Stock [Line Items]
Preferred stock, par value		$ 0.01	$ 0.01
Proceeds from issuance of redeemable preferred stock		$ 15
Series A Preferred Stock [Member]
Class Of Stock [Line Items]
Aggregate liquidation preference, value		$ 15
Payment of cash dividend on preferred stock percentage per annum		13.00%
Preferred stock leverage ratio, increase percentage		7.50%
Preferred stock leverage ratio, decrease percentage		1.00%
Percentage of preferred stock cash dividend required to pay if event of default occurs		15.00%
Percentage of preferred stock leverage ratio increase if an event of default occurs		16.50%
Wholly Owned Subsidiary of LQH Parent [Member] | Series A Preferred Stock [Member]
Class Of Stock [Line Items]
Number of shares issued	15,000	15,000
Preferred stock, par value		$ 0.01
Proceeds from issuance of redeemable preferred stock		$ 15