Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows From Operating Activities:
Net income	$ 49,919us-gaap_NetIncomeLoss	$ 51,920us-gaap_NetIncomeLoss	$ 74,221us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	176,275us-gaap_DepreciationAndAmortization	166,086us-gaap_DepreciationAndAmortization	166,975us-gaap_DepreciationAndAmortization
Amortization of debt issuance costs and discounts	9,399	10,869	13,896
Loss on sale or disposal of assets	5,792us-gaap_GainLossOnDispositionOfAssets1	10,100us-gaap_GainLossOnDispositionOfAssets1	11,223us-gaap_GainLossOnDispositionOfAssets1
Loss on early extinguishment of debt and write-off of discounts and deferred financing costs	461	29,858	2,053
Deferred income tax provision	28,000us-gaap_DeferredIncomeTaxExpenseBenefit	24,728us-gaap_DeferredIncomeTaxExpenseBenefit	36,937us-gaap_DeferredIncomeTaxExpenseBenefit
Equity-based compensation	2,349us-gaap_ShareBasedCompensation	6,025us-gaap_ShareBasedCompensation	1,191us-gaap_ShareBasedCompensation
Changes in assets and liabilities:
Accounts receivable	6,256	(3,215)	4,651
Inventories	2,709us-gaap_IncreaseDecreaseInInventories	(166)us-gaap_IncreaseDecreaseInInventories	(4,156)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	(1,276)	(5,343)	(1,327)
Accounts payable	(8,791)	4,293	(6,247)
Accrued salaries, wages and benefits	(4,928)	(9,092)	899
Deferred revenue	(6,089)	94	(1,444)
Other accrued expenses	(763)	(824)	(760)
Other assets and liabilities	2,219	1,128	1,328
Net cash provided by operating activities	261,532	286,461	299,440
Cash Flows From Investing Activities:
Capital expenditures	(154,641)	(166,258)	(191,745)
Acquisition of Knott's Soak City Water Park			(12,000)
Acquisition of intangible assets	(1,900)
Change in restricted cash	(5)	(118)	(573)
Net cash used in investing activities	(156,546)	(166,376)	(204,318)
Cash Flows From Financing Activities:
Repayment of long-term debt	(45,537)us-gaap_RepaymentsOfLongTermDebt	(189,255)us-gaap_RepaymentsOfLongTermDebt	(57,680)us-gaap_RepaymentsOfLongTermDebt
Purchase of treasury stock	(60,058)	(44,163)
Proceeds from draw on revolving credit facility	40,000us-gaap_ProceedsFromLinesOfCredit	35,000us-gaap_ProceedsFromLinesOfCredit	61,000us-gaap_ProceedsFromLinesOfCredit
Repayment of revolving credit facility	(40,000)us-gaap_RepaymentsOfLinesOfCredit	(35,000)us-gaap_RepaymentsOfLinesOfCredit	(97,000)us-gaap_RepaymentsOfLinesOfCredit
Dividends paid to stockholders	(72,113)us-gaap_PaymentsOfDividendsCommonStock	(36,175)us-gaap_PaymentsOfDividendsCommonStock	(502,977)us-gaap_PaymentsOfDividendsCommonStock
Proceeds from the issuance of debt		1,455us-gaap_ProceedsFromIssuanceOfDebt	487,163us-gaap_ProceedsFromIssuanceOfDebt
Debt issuance costs		(10,635)us-gaap_PaymentsOfDebtIssuanceCosts	(2,951)us-gaap_PaymentsOfDebtIssuanceCosts
Payment of tax withholdings on equity-based compensation through shares withheld	(213)	(852)
Proceeds from issuance of common stock in initial public offering, net of underwriter commissions		253,800
Repayment of note payable		(3,000)us-gaap_RepaymentsOfNotesPayable
Redemption premium payment		(15,400)seas_DebtRedemptionPremiumPayment
Offering costs		(4,694)us-gaap_PaymentsOfStockIssuanceCosts	(3,665)us-gaap_PaymentsOfStockIssuanceCosts
Net cash used in financing activities	(177,921)	(48,919)	(116,110)
Change in Cash and Cash Equivalents	(72,935)	71,166	(20,988)
Cash and Cash Equivalents-Beginning of period	116,841	45,675	66,663
Cash and Cash Equivalents-End of period	43,906	116,841	45,675
Supplemental Disclosures of Noncash Investing and Financing Activities
Dividends declared, but unpaid	172us-gaap_DividendsPayableCurrent	17,939us-gaap_DividendsPayableCurrent	203us-gaap_DividendsPayableCurrent
Capital expenditures in accounts payable	25,730	27,160	22,696
Issuance of notes payable related to business acquisition			3,000us-gaap_NotesIssued1
Treasury stock purchases settled in January 2015	$ 5,650

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The cash outflow to reacquire common stock during the period.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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