Equity-Based Compensation - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended			6 Months Ended					1 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended					3 Months Ended		6 Months Ended			6 Months Ended			6 Months Ended				6 Months Ended						3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Initial Public Offering [Member]	Apr. 24, 2013 Initial Public Offering [Member]	Jun. 30, 2013 Employee Unit Incentive Plan [Member]	Jun. 30, 2013 Employee Unit Incentive Plan [Member] Minimum [Member]	Jun. 30, 2013 Employee Unit Incentive Plan [Member] Maximum [Member]	Jun. 30, 2013 Employee Unit Plan and 2013 Grants [Member] Tranches	Jun. 30, 2013 Units Surrendered For Shares Plan [Member]	Apr. 19, 2013 2013 Omni Bus Incentive Plan [Member]	Jun. 30, 2013 2013 Omni Bus Incentive Plan [Member]	Jun. 30, 2013 2013 Grant [Member]	Jun. 30, 2013 2013 Grant [Member]	Jun. 30, 2013 TVUs [Member]	Jun. 30, 2013 TVUs [Member] Minimum [Member]	Jun. 30, 2013 TVUs [Member] Employee Unit Incentive Plan [Member]	Jun. 30, 2013 TVUs [Member] Units Surrendered For Shares Plan [Member]	Jun. 30, 2013 Time Vesting Units And Time Restricted Shares [Member]	Jun. 30, 2012 Time Vesting Units And Time Restricted Shares [Member]	Jun. 30, 2013 Time Vesting Units And Time Restricted Shares [Member]	Jun. 30, 2012 Time Vesting Units And Time Restricted Shares [Member]	Jun. 30, 2013 Unvested Time Restricted Shares [Member]	Jun. 30, 2013 Time Restricted Shares [Member]	Jun. 30, 2013 Time Restricted Shares [Member] After Lock Up Period [Member] 2013 Grant [Member]	Jun. 30, 2013 Time Restricted Shares [Member] Over Remaining Service Period [Member] 2013 Grant [Member]	Jun. 30, 2013 2.25x PVU Employee Units [Member]	Jun. 30, 2013 2.75x PVU Employee Units [Member]	Jun. 30, 2013 2.25x Performance Restricted Shares [Member] 2013 Grant [Member]	Jun. 30, 2013 2.75x Performance Restricted Shares [Member] 2013 Grant [Member]	Jun. 30, 2013 Common Stock [Member] Units Surrendered For Shares Plan [Member]	Jun. 30, 2013 Vested And Unvested Time Vesting Units, Performance Vesting Units Surrendered for Shares Of Stock And Unvested Restricted Stock [Member] Employee Unit Incentive Plan [Member]	Jun. 30, 2013 Class D Units and vested TVUs surrendered for shares of stock [Member] Employee Unit Incentive Plan [Member]	Jun. 30, 2013 Class D Units and vested TVUs surrendered for shares of stock [Member] Common Stock [Member] Units Surrendered For Shares Plan [Member]	Jun. 30, 2013 Unvested TVUs and PVUs surrendered for shares of unvested restricted stock [Member] Employee Unit Incentive Plan [Member]	Jun. 30, 2013 Unvested TVUs and PVUs surrendered for shares of unvested restricted stock [Member] Common Stock [Member] Units Surrendered For Shares Plan [Member]	Jun. 30, 2013 Vested Time Vesting Units Surrendered For Shares Of Stock [Member]	Jun. 30, 2013 Vested Time Vesting Units Surrendered For Shares Of Stock [Member] Employee Unit Incentive Plan [Member]	Jun. 30, 2013 Vested Time Vesting Units Surrendered For Shares Of Stock [Member] Common Stock [Member] Units Surrendered For Shares Plan [Member]	Jun. 30, 2013 Unvested Time Vesting Units Surrendered For Unvested Time Restricted Shares [Member]	Jun. 30, 2013 Unvested Time Vesting Units Surrendered For Unvested Time Restricted Shares [Member] Employee Unit Incentive Plan [Member]	Jun. 30, 2013 Unvested Time Vesting Units Surrendered For Unvested Time Restricted Shares [Member] Common Stock [Member] Time Restricted Shares [Member] Units Surrendered For Shares Plan [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 which 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. Upon vesting of the Employee Units, the Company issued the corresponding number of shares of common stock of the Company to the Partnerships. There was no related cost to the employee upon vesting of the units
Number of tranches for each equity award							3
Surrender of units to shares of stock (in units)				698,533																										669,293	150,446		548,087			121,206			103,913
Shares provided for surrender of units, in shares																													4,165,861			949,142		3,216,719			727,852			599,215
Portion of employee units originally granted that were TVUs															One-third
Vesting period of Employee Units granted, years															5 years
Vesting percentage per year															20.00%
Percentage interest a general partner or beneficial owner other than Blackstone needs to obtain more of														50.00%
Percentage of vesting upon change of control													100.00%
Incremental equity compensation cost																																			$ 282			$ 220
Recognized compensation expense											1,291						611	300	931	567
Unrecognized compensation cost																					$ 2,295		$ 1,914	$ 2,424			$ 4,974	$ 3,764
Remaining vesting term of unvested TVUs																						2 years
Annualized effective compounded return rate																									20.00%	15.00%
Employee Unit fair value input discount rate				10.50%
Fair value assumptions, holding period					2 years 7 months 6 days	3 years 7 months 6 days				2 years						2 years
Fair value assumptions, risk free rate					0.33%	1.22%		0.24%				0.24%
Fair value assumptions, volatility					49.00%	57.00%						33.20%				37.60%
Fair value assumptions, discount for lack of marketability					31.00%	53.00%
Fair value assumptions, dividend yield				0.00%												0.00%
Shares of common stock issued through initial public offering, per share		$ 27.00	$ 27.00
Common stock reserved for future issuance									15,000,000
Restricted stock granted to directors, officers and employees									494,557
Initial public offering lock up period	180 days
Grant date fair value measuring method												The grant date fair value of the 2.25x and 2.75x Performance Restricted 2013 shares was measured using the asset-or-nothing option pricing model.
Shares available for future issuance										14,505,443