Restructuring Programs - Additional Information (Detail) $ in Thousands	3 Months Ended
	Dec. 31, 2017 Position	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($) Position
2017 Restructuring Program [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring costs, description		Involves the elimination of approximately 350 positions by the end of the fourth quarter of 2017 across certain of the Company’s theme parks and corporate headquarters.
Restructuring and other related costs incurred to date | $		$ 5,100
2017 Restructuring Program [Member] | Scenario, Forecast [Member]
Restructuring Cost And Reserve [Line Items]
Number of positions eliminated | Position	350
2016 Restructuring Program [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring costs, description			Involved the elimination of approximately 320 positions across all of the Company’s theme parks and corporate headquarters.
Number of positions eliminated | Position			320
Restructuring and other related costs incurred to date | $			$ 8,904