Mandatorily Redeemable Preferred Shares - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Class Of Stock [Line Items]
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	750.00%
Preferred stock leverage ratio, decrease percentage	100.00%
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
Preferred stock, par value	$ 0.01
Proceeds from issuance of redeemable preferred stock	$ 15