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Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	1 Months Ended	3 Months Ended	12 Months Ended			0 Months Ended
	Apr. 08, 2013	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Jan. 05, 2015	Apr. 24, 2013	Apr. 09, 2014	Dec. 17, 2013	Aug. 12, 2014	Dec. 16, 2014	Apr. 30, 2014	Apr. 18, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued			90,191,100us-gaap_CommonStockSharesIssued	90,191,100us-gaap_CommonStockSharesIssued	89,900,453us-gaap_CommonStockSharesIssued		90,191,100us-gaap_CommonStockSharesIssued
Unvested shares of common stock			3,067,451	3,067,451			3,067,451
Shares of treasury stock held			4,105,970us-gaap_TreasuryStockNumberOfSharesHeld	4,105,970us-gaap_TreasuryStockNumberOfSharesHeld			4,105,970us-gaap_TreasuryStockNumberOfSharesHeld
Stock split description				On April 7, 2013, the Board authorized an eight-for-one split of the Company's common stock, which was effective on April 8, 2013. The Company’s historical share and per share information has been retroactively adjusted to give effect to this stock split.
Stock split conversion ratio	8
Common stock, par value			$ 0.01	$ 0.01	$ 0.01		$ 0.01
Common stock, shares authorized			1,000,000,000us-gaap_CommonStockSharesAuthorized	1,000,000,000us-gaap_CommonStockSharesAuthorized	1,000,000,000us-gaap_CommonStockSharesAuthorized		1,000,000,000us-gaap_CommonStockSharesAuthorized
Preferred stock, shares authorized			100,000,000us-gaap_PreferredStockSharesAuthorized	100,000,000us-gaap_PreferredStockSharesAuthorized	100,000,000us-gaap_PreferredStockSharesAuthorized		100,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, par value			$ 0.01	$ 0.01	$ 0.01		$ 0.01
Net proceeds received from offering					$ 245,441
Secondary offering costs				747seas_SecondaryOfferingCosts	1,407seas_SecondaryOfferingCosts
Number of shares repurchased			4,105,970us-gaap_TreasuryStockShares	4,105,970us-gaap_TreasuryStockShares	1,500,000us-gaap_TreasuryStockShares		4,105,970us-gaap_TreasuryStockShares
Share Repurchase Program, authorized amount			15,000	15,000			15,000					250,000
Share Repurchase Program, beginning date				Jan. 01, 2015
Shares repurchased			855,970us-gaap_TreasuryStockSharesAcquired	2,605,970us-gaap_TreasuryStockSharesAcquired	1,500,000us-gaap_TreasuryStockSharesAcquired
Stock repurchase during period under Share Repurchase Program, average price per share			$ 17.50
Share Repurchase Program, remaining authorized repurchase amount			235,000	235,000			235,000
Stock repurchased during period, total cost			15,000	65,708	44,163
Treasury stock at cost			109,871us-gaap_TreasuryStockValue	109,871us-gaap_TreasuryStockValue	44,163us-gaap_TreasuryStockValue		109,871us-gaap_TreasuryStockValue
Cash dividends declared				$ 0.62	$ 0.60	$ 6.07
Dividends paid to common stockholders				72,113us-gaap_PaymentsOfDividendsCommonStock	36,175us-gaap_PaymentsOfDividendsCommonStock	502,977us-gaap_PaymentsOfDividendsCommonStock
Dividend declared to stockholders		500,000us-gaap_DividendsCommonStockCash		54,345us-gaap_DividendsCommonStockCash	53,911us-gaap_DividendsCommonStockCash	500,000us-gaap_DividendsCommonStockCash
On or After December 1, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redemption price for Senior Notes percentage				105.50%
2.25x Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends on unvested restricted shares							1,770
2.75x Performance Restricted Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends on unvested restricted shares							1,770
Subsequent Events [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividends declared								$ 0.21
Dividend payable date								Jan. 22, 2015
Dividend record date								Jan. 13, 2015
Dividends declared date								Jan. 05, 2015
Amended Share Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Repurchase Program, authorized amount during remainder of 2014													15,000
Share Repurchase Program, beginning date				Dec. 17, 2014
Senior Notes [Member] \| On or After December 1, 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Redemption price for Senior Notes percentage									111.00%
Secondary Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued										0	0
Shares offered and sold by the selling stockholders										17,250,000	18,000,000
Number of shares repurchased					1,500,000									1,750,000
Treasury stock at cost			109,871	109,871	44,163		109,871
Initial Public Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock issued through initial public offering, shares									10,000,000
Shares offered and sold by the selling stockholders									19,900,000
Offering price per share									27.00						$ 27.00
Net proceeds received from offering									245,400
Payment made to affiliate for termination of Advisory Agreement									46,300
Initial Public Offering [Member] \| Senior Notes [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net proceeds received used to redeem 11% Senior Notes									140,000
Initial Public Offering [Member] \| Term B Loan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net proceeds from offering									37,000
Underwriters Over-Allotment Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares offered and sold by the selling stockholders									3,900,000	2,250,000