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Acquisitions - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2012
Nov. 30, 2012
Sep. 30, 2013
Dec. 31, 2014
Business Acquisition [Line Items]        
Payments in acquisition $ 12,000us-gaap_PaymentsToAcquireBusinessesGross      
Knott's Soak City [Member]        
Business Acquisition [Line Items]        
Cost of acquired entity   15,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_SubsidiarySaleOfStockAxis
= seas_KnottSoakCityMember		    
Payments in acquisition   12,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_SubsidiarySaleOfStockAxis
= seas_KnottSoakCityMember		    
Note payable     $ 3,000us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ us-gaap_SubsidiarySaleOfStockAxis
= seas_KnottSoakCityMember		  
Description of acquired entity       For the year ended December 31, 2012, there were no material revenues or expenses associated with the park included in the accompanying consolidated financial statements because the park was closed for the season. The Company rebranded the water park as Aquatica San Diego and re-opened in June 2013.