Subsequent Events	3 Months Ended
Mar. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	11. SUBSEQUENT EVENTS In connection with the preparation of the unaudited condensed consolidated financial statements, the Company evaluated subsequent events after the condensed consolidated balance sheet date through the date the unaudited condensed consolidated financial statements were issued, to determine whether any events occurred that required recognition or disclosure in the accompanying unaudited condensed consolidated financial statements. The Company believes the following events require disclosure: *Stock Split* On April 7, 2013, the Company’s Board of Directors authorized an eight-for-one split of the Company’s common stock which was effective on April 8, 2013. The Company retained the current par value of $0.01 per share for all shares of common stock after the stock split, and accordingly, stockholders’ equity on the accompanying condensed consolidated balance sheets and condensed consolidated statements of changes in stockholders’ equity reflects the stock split by reclassifying from “Additional paid-in capital” to “Common stock” an amount equal to the par value of the additional shares arising from the split. The Company’s historical share and per share information has been retroactively adjusted to give effect to this stock split. Contemporaneously with the stock split, the Company’s Board of Directors approved an increase in the number of authorized shares of common stock to 1 billion shares. Additionally, upon the consummation of the initial public offering, the Board of Directors authorized 100,000,000 shares of preferred stock at a par value of $0.01 per share. *Initial Public Offering* On April 24, 2013, the Company completed its initial public offering of its common stock in which it offered and sold 10,000,000 shares of common stock and the selling shareholders of the Company offered and sold 19,900,000 shares of common stock including, 3,900,000 shares of common stock pursuant to the exercise in full of the underwriters’ over-allotment option. The shares offered and sold in the offering were registered under the Securities Act pursuant to the Company’s Registration Statement on Form S-1, which was declared effective by the SEC on April 18, 2013. The common stock is listed on the New York Stock Exchange under the symbol “SEAS”. The Company’s shares of common stock were sold at an initial public offering price of $27.00 per share, which generated net proceeds of approximately $245,400 to the Company after deducting underwriting discounts, expenses and transaction costs. The Company did not receive any proceeds from shares sold by the selling shareholders. The Company used a portion of the net proceeds received in the offering to redeem $140,000 in aggregate principal amount of its Senior Notes at a redemption price of 111.0% plus accrued and unpaid interest thereof, pursuant to a provision in the indenture governing the Senior Notes that permits the Company to redeem up to 35% of the aggregate principal amount of the Senior Notes with the net cash proceeds of certain equity offerings. In addition, the Company used approximately $46,300 of the net proceeds received from the offering to make a one-time payment to an affiliate of Blackstone in connection with the termination of the 2009 Advisory Agreement described below. Approximately $37,000 of the net proceeds received from the offering were used to pay principal on Term Loan B. The remainder of the proceeds will be used for other general corporate purposes. *2013 Omnibus Incentive Plan* On April 19, 2013, the Company registered 15,000,000 shares of common stock reserved for future issuance under the Company’s new 2013 Omnibus Incentive Plan (“Incentive Plan”). In connection with the initial public offering, 494,557 shares of restricted stock were granted to the Company’s directors, officers and employees under this Incentive Plan. *Shares of Common Stock Granted to Employees* Prior to the consummation of the initial public offering, on April 18, 2013, units granted by the Partnerships in the form of Class D Units and Employee Units and held by certain of the Company’s directors, officers, employees, and consultants were surrendered to the Partnerships and such individuals received an aggregate of 4,165,861 shares of the Company’s common stock from the Partnerships. The number of shares of the Company’s common stock granted to individuals was determined in a manner intended to replicate the economic benefit to each equity holder immediately prior to the transaction. The Class D Units and vested Employee Units were converted into shares of common stock and the unvested Employee Units were converted into unvested restricted shares of the Company’s common stock which are subject to vesting terms substantially similar to those applicable to the unvested Employee Units immediately prior to the transaction. The Company is currently performing a valuation of these equity awards to determine the fair value of the awards immediately before and after the modification in order to assess if there is an incremental equity compensation cost associated with this modification. *Amendment No. 4 to the Senior Secured Credit Facilities and Fourth Supplemental Indenture* On April 5, 2013, SEA entered into Amendment No. 4 to the Senior Secured Credit Facilities (“Amendment No. 4”) and on April 12, 2013, entered in the Fourth Supplemental Indenture to the Indenture (the “Fourth Supplemental Indenture”) related to the Senior Notes. Amendment No. 4 amends the terms of the existing Senior Secured Credit Facilities to, among other things, permit SEA to pay certain distributions following an initial public offering and replaces the existing $172,500 senior secured revolving credit facility with a new $192,500 senior secured revolving credit facility. Additionally, the Fourth Supplemental Indenture increases by $20,000 the amount of debt that the Company can incur and have outstanding at one time under the Senior Secured Credit Facilities and amends the transactions with affiliates covenant to allow for the payment of a termination fee not to exceed $50,000 in connection with the termination of the 2009 Advisory Agreement. The amendments contemplated by Amendment No. 4 and the Fourth Supplemental Indenture became effective on April 24, 2013. *Advisory Agreement* In connection with the completion of the initial public offering, as described above, on April 24, 2013, the Company terminated the 2009 Advisory Agreement between the Company and affiliates of Blackstone (see Note 9-Related- Party Transactions), provided, however, that the provisions relating to indemnification and certain other provisions survive termination. In connection with such termination, the Company paid a termination fee to Blackstone equal to approximately $46,300 with a portion of the net proceeds from the offering. *Amendment No. 5 to the Senior Secured Credit Facilities* On May 14, 2013, SEA entered into Amendment No. 5 to the Senior Secured Credit Facilities (“Amendment No. 5”). Amendment No. 5 amends the terms of the existing Senior Secured Credit Facilities to, among other things, refinance Term Loan A and Term Loan B into new Term B-2 Loans, extend the final maturity date of the term loan facilities, reduce future principal and interest payments, and provide for additional future borrowings. The Term B-2 Loans were borrowed in an aggregate principal amount of $1,405,000. Borrowings under the Term B-2 Loans will bear interest, at SEA’s option, at a rate equal to a margin over either (a) a base rate determined by reference to the higher of (1) the Bank of America’s prime lending rate and (2) the federal funds effective rate plus 1/2 of 1% or (b) a LIBOR rate determined by reference to the British Bankers Association (“BBA”) LIBOR rate for the interest period relevant to such borrowing. The margin for the Term B-2 Loans is 1.25%, in the case of base rate loans, and 2.25%, in the case of LIBOR rate loans, subject to a base rate floor of 1.75% and a LIBOR floor of 0.75%. The applicable margin for the Term B-2 Loans is subject to one 25 basis point step-down upon achievement by SEA of a certain leverage ratio. Term B-2 Loans will amortize in equal quarterly installments in an aggregate annual amount equal to 1.0% of the original principal amount of the Term B-2 Loans on the Amendment No. 5 effective date, with the balance payable on the final maturity date. The Term B-2 Loans will have a final maturity date of May 14, 2020. Amendment No. 5 also permits SEA to add one or more incremental term loan facilities to the Senior Secured Credit Facilities and/or increase commitments under the Revolving Credit Facility in an aggregate principal amount of up to $350,000. SEA may also incur additional incremental term loans provided that, among other things, on a pro forma basis after giving effect to the incurrence of such incremental term loans, the first lien secured net leverage ratio, as defined in the Senior Secured Credit Facility, is no greater than 3.50 to 1.00.

11. SUBSEQUENT EVENTS

In connection with the preparation of the unaudited condensed consolidated financial statements, the Company evaluated subsequent events after the condensed consolidated balance sheet date through the date the unaudited condensed consolidated financial statements were issued, to determine whether any events occurred that required recognition or disclosure in the accompanying unaudited condensed consolidated financial statements. The Company believes the following events require disclosure:

Stock Split

On April 7, 2013, the Company’s Board of Directors authorized an eight-for-one split of the Company’s common stock which was effective on April 8, 2013. The Company retained the current par value of $0.01 per share for all shares of common stock after the stock split, and accordingly, stockholders’ equity on the accompanying condensed consolidated balance sheets and condensed consolidated statements of changes in stockholders’ equity reflects the stock split by reclassifying from “Additional paid-in capital” to “Common stock” an amount equal to the par value of the additional shares arising from the split. The Company’s historical share and per share information has been retroactively adjusted to give effect to this stock split.

Contemporaneously with the stock split, the Company’s Board of Directors approved an increase in the number of authorized shares of common stock to 1 billion shares. Additionally, upon the consummation of the initial public offering, the Board of Directors authorized 100,000,000 shares of preferred stock at a par value of $0.01 per share.

Initial Public Offering

On April 24, 2013, the Company completed its initial public offering of its common stock in which it offered and sold 10,000,000 shares of common stock and the selling shareholders of the Company offered and sold 19,900,000 shares of common stock including, 3,900,000 shares of common stock pursuant to the exercise in full of the underwriters’ over-allotment option. The shares offered and sold in the offering were registered under the Securities Act pursuant to the Company’s Registration Statement on Form S-1, which was declared effective by the SEC on April 18, 2013. The common stock is listed on the New York Stock Exchange under the symbol “SEAS”.

The Company’s shares of common stock were sold at an initial public offering price of $27.00 per share, which generated net proceeds of approximately $245,400 to the Company after deducting underwriting discounts, expenses and transaction costs. The Company did not receive any proceeds from shares sold by the selling shareholders. The Company used a portion of the net proceeds received in the offering to redeem $140,000 in aggregate principal amount of its Senior Notes at a redemption price of 111.0% plus accrued and unpaid interest thereof, pursuant to a provision in the indenture governing the Senior Notes that permits the Company to redeem up to 35% of the aggregate principal amount of the Senior Notes with the net cash proceeds of certain equity offerings. In addition, the Company used approximately $46,300 of the net proceeds received from the offering to make a one-time payment to an affiliate of Blackstone in connection with the termination of the 2009 Advisory Agreement described below. Approximately $37,000 of the net proceeds received from the offering were used to pay principal on Term Loan B. The remainder of the proceeds will be used for other general corporate purposes.

2013 Omnibus Incentive Plan

On April 19, 2013, the Company registered 15,000,000 shares of common stock reserved for future issuance under the Company’s new 2013 Omnibus Incentive Plan (“Incentive Plan”). In connection with the initial public offering, 494,557 shares of restricted stock were granted to the Company’s directors, officers and employees under this Incentive Plan.

Shares of Common Stock Granted to Employees

Prior to the consummation of the initial public offering, on April 18, 2013, units granted by the Partnerships in the form of Class D Units and Employee Units and held by certain of the Company’s directors, officers, employees, and consultants were surrendered to the Partnerships and such individuals received an aggregate of 4,165,861 shares of the Company’s common stock from the Partnerships. The number of shares of the Company’s common stock granted to individuals was determined in a manner intended to replicate the economic benefit to each equity holder immediately prior to the transaction. The Class D Units and vested Employee Units were converted into shares of common stock and the unvested Employee Units were converted into unvested restricted shares of the Company’s common stock which are subject to vesting terms substantially similar to those applicable to the unvested Employee Units immediately prior to the transaction. The Company is currently performing a valuation of these equity awards to determine the fair value of the awards immediately before and after the modification in order to assess if there is an incremental equity compensation cost associated with this modification.

Amendment No. 4 to the Senior Secured Credit Facilities and Fourth Supplemental Indenture

On April 5, 2013, SEA entered into Amendment No. 4 to the Senior Secured Credit Facilities (“Amendment No. 4”) and on April 12, 2013, entered in the Fourth Supplemental Indenture to the Indenture (the “Fourth Supplemental Indenture”) related to the Senior Notes.

Amendment No. 4 amends the terms of the existing Senior Secured Credit Facilities to, among other things, permit SEA to pay certain distributions following an initial public offering and replaces the existing $172,500 senior secured revolving credit facility with a new $192,500 senior secured revolving credit facility. Additionally, the Fourth Supplemental Indenture increases by $20,000 the amount of debt that the Company can incur and have outstanding at one time under the Senior Secured Credit Facilities and amends the transactions with affiliates covenant to allow for the payment of a termination fee not to exceed $50,000 in connection with the termination of the 2009 Advisory Agreement. The amendments contemplated by Amendment No. 4 and the Fourth Supplemental Indenture became effective on April 24, 2013.

Advisory Agreement

In connection with the completion of the initial public offering, as described above, on April 24, 2013, the Company terminated the 2009 Advisory Agreement between the Company and affiliates of Blackstone (see Note 9-Related- Party Transactions), provided, however, that the provisions relating to indemnification and certain other provisions survive termination. In connection with such termination, the Company paid a termination fee to Blackstone equal to approximately $46,300 with a portion of the net proceeds from the offering.

Amendment No. 5 to the Senior Secured Credit Facilities

On May 14, 2013, SEA entered into Amendment No. 5 to the Senior Secured Credit Facilities (“Amendment No. 5”). Amendment No. 5 amends the terms of the existing Senior Secured Credit Facilities to, among other things, refinance Term Loan A and Term Loan B into new Term B-2 Loans, extend the final maturity date of the term loan facilities, reduce future principal and interest payments, and provide for additional future borrowings.

The Term B-2 Loans were borrowed in an aggregate principal amount of $1,405,000. Borrowings under the Term B-2 Loans will bear interest, at SEA’s option, at a rate equal to a margin over either (a) a base rate determined by reference to the higher of (1) the Bank of America’s prime lending rate and (2) the federal funds effective rate plus 1/2 of 1% or (b) a LIBOR rate determined by reference to the British Bankers Association (“BBA”) LIBOR rate for the interest period relevant to such borrowing. The margin for the Term B-2 Loans is 1.25%, in the case of base rate loans, and 2.25%, in the case of LIBOR rate loans, subject to a base rate floor of 1.75% and a LIBOR floor of 0.75%. The applicable margin for the Term B-2 Loans is subject to one 25 basis point step-down upon achievement by SEA of a certain leverage ratio.

Term B-2 Loans will amortize in equal quarterly installments in an aggregate annual amount equal to 1.0% of the original principal amount of the Term B-2 Loans on the Amendment No. 5 effective date, with the balance payable on the final maturity date. The Term B-2 Loans will have a final maturity date of May 14, 2020. Amendment No. 5 also permits SEA to add one or more incremental term loan facilities to the Senior Secured Credit Facilities and/or increase commitments under the Revolving Credit Facility in an aggregate principal amount of up to $350,000. SEA may also incur additional incremental term loans provided that, among other things, on a pro forma basis after giving effect to the incurrence of such incremental term loans, the first lien secured net leverage ratio, as defined in the Senior Secured Credit Facility, is no greater than 3.50 to 1.00.