Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Depreciation expense		$ 155,200	$ 191,500	$ 174,700
Accelerated depreciation related to the disposal of the lifting floors			33,700
Operating Expense [Member]
Property, Plant and Equipment [Line Items]
Impairment loss of long-lived assets	$ 7,800
Blue World Project Asset Write-offs			$ 6,400