Equity-Based Compensation - Additional Information (Detail) (USD $)	9 Months Ended		0 Months Ended				0 Months Ended		3 Months Ended		9 Months Ended				0 Months Ended	3 Months Ended		9 Months Ended				0 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2014 Employee Unit Incentive Plan [Member]	Sep. 30, 2014 Employee Unit Plan and 2013 Grants [Member] Tranches	Apr. 18, 2013 Units Surrendered for Shares Plan [Member] Common Stock [Member]	Apr. 19, 2013 2013 Omnibus Incentive Plan [Member]	Sep. 30, 2014 2013 Omnibus Incentive Plan [Member]	Apr. 19, 2013 2013 Omnibus Incentive Plan [Member]	Apr. 18, 2013 Class D Units and Vested TVUs Surrendered for Shares of Stock [Member] Units Surrendered for Shares Plan [Member] Common Stock [Member]	Apr. 18, 2013 Unvested TVUs and PVUs Surrendered for Shares of Unvested Restricted Stock [Member] Units Surrendered for Shares Plan [Member] Common Stock [Member]	Sep. 30, 2014 2.25x Performance Restricted Shares [Member]	Sep. 30, 2013 2.25x Performance Restricted Shares [Member]	Sep. 30, 2014 2.25x Performance Restricted Shares [Member]	Sep. 30, 2013 2.25x Performance Restricted Shares [Member]	Sep. 30, 2014 2.25x Performance Restricted Shares [Member] Units Surrendered for Shares Plan [Member]	Sep. 30, 2014 2.25x Performance Restricted Shares [Member] 2013 Omnibus Incentive Plan [Member]	Nov. 01, 2014 2.25x Performance Restricted Shares [Member] Omnibus Stock Plan [Member] Subsequent Events [Member] Units Surrendered for Shares Plan [Member] Blackstone and Affiliates [Member]	Sep. 30, 2014 2.75x Performance Restricted Shares [Member]	Sep. 30, 2013 2.75x Performance Restricted Shares [Member]	Sep. 30, 2014 2.75x Performance Restricted Shares [Member]	Sep. 30, 2013 2.75x Performance Restricted Shares [Member]	Sep. 30, 2014 2.75x Performance Restricted Shares [Member] Units Surrendered for Shares Plan [Member]	Sep. 30, 2014 2.75x Performance Restricted Shares [Member] 2013 Omnibus Incentive Plan [Member]	Nov. 01, 2014 2.75x Performance Restricted Shares [Member] Omnibus Stock Plan [Member] Subsequent Events [Member] Units Surrendered for Shares Plan [Member] Blackstone and Affiliates [Member]	Sep. 30, 2014 Time Restricted Shares [Member]	Sep. 30, 2014 Time Restricted Shares [Member]	Sep. 30, 2014 Time Restricted Shares [Member] Units Surrendered for Shares Plan [Member]	Sep. 30, 2014 Time Restricted Shares [Member] 2013 Omnibus Incentive Plan [Member]	Sep. 30, 2013 Time Restricted Shares [Member] 2013 Omnibus Incentive Plan [Member]	Sep. 30, 2014 Time Restricted Shares [Member] 2013 Omnibus Incentive Plan [Member]	Sep. 30, 2013 Time Restricted Shares [Member] 2013 Omnibus Incentive Plan [Member]	Sep. 30, 2013 Time Vesting Units and Time Restricted Shares [Member]	Sep. 30, 2013 Time Vesting Units and Time Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Unit Incentive Plan terms	Under the Employee Unit Plan, the Partnerships granted employee units to certain key employees of SEA ("Employee Units"). The Employee Units that were granted were accounted for as equity awards and were divided into three tranches, Time Vesting Units ("TVUs"), 2.25x Performance Vesting Units ("PVUs") and 2.75x PVUs.
Number of tranches for each equity award		3
Shares provided for surrender of units, in shares			4,165,861				949,142	3,216,719
Equity compensation expense									$ 0	$ 0	$ 0	$ 0				$ 0	$ 0	$ 0	$ 0				$ 248,000	$ 774,000		$ 321,000	$ 1,876,000	$ 1,131,000	$ 3,167,000	$ 606,000	$ 1,537,000
Unrecognized compensation cost													27,734,000	4,902,000						18,584,000	3,709,000				539,000	1,083,000		1,083,000
Annualized effective compounded return rate											20.00%							15.00%
Return on investment											2.25x multiple on such funds' investment							2.75x multiple on such funds' investment
Common stock reserved for future issuance						15,000,000
Restricted stock granted to directors, officers and employees				494,557
Additional future cash proceeds															$ 17,000,000							$ 444,000,000
Shares available for future issuance					14,521,774