Equity grant policy effective date.

No definition available.

Name:	seas_EquityGrantPolicyEffectiveDate
Namespace Prefix:	seas_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The length of the performance period related to the Long Term Incentive performance-vesting shares.

+ References

No definition available.

+ Details

Name:	seas_LengthOfPerformancePeriod
Namespace Prefix:	seas_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of senior executives who agreed to forfeit their remaining unvested shares under the modification of award.

+ References

No definition available.

+ Details

Name:	seas_NumberOfSeniorExecutivesAgreedToForfeit
Namespace Prefix:	seas_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of bonus which is payable in cash.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfBonusInCash
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of bonus which is payable in performance-vesting restricted shares based on the Company's achievement of performance goals

+ References

No definition available.

+ Details

Name:	seas_PercentageOfBonusInShare
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of total granted shares which can be earned at the end of each performance period.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfGrantedSharesEarnedRelatedToEachPerformancePeriod
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of remaining unvested shares held by Senior executives which will forfeit under the modification of award.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfRestrictedSharesToForfeit
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of restricted shares to vest under modification of award.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfRestrictedSharesToVest
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of specified performance goal weighted to Adjusted EBITDA margin.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfWeightedAdjustedEBITDAMarginOfSpecifiedPerformanceGoals
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of specified performance goal weighted to Adjusted EBITDA.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfWeightedAdjustedEBITDAOfSpecifiedPerformanceGoals
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of specified performance goal weighted to return on invested capital.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfWeightedReturnOnInvestedCapitalOfSpecifiedPerformanceGoals
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of specified performance goal weighted to total revenue.

+ References

No definition available.

+ Details

Name:	seas_PercentageOfWeightedRevenueOfSpecifiedPerformanceGoals
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares awarded during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Represents total shares that could be earned under the maximum performance level of achievement for all performance periods.

+ References

No definition available.

+ Details

Name:	seas_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardedInPeriod
Namespace Prefix:	seas_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of performance shares eligible to vest per year.

+ References

No definition available.

+ Details

Name:	seas_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesVestRangeOnAnnualEligibleAwardVestingRightsPercentage
Namespace Prefix:	seas_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Performance goals upon achievement of which share based compensation is expected to vest.

+ References

No definition available.

+ Details

Name:	seas_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceConditions
Namespace Prefix:	seas_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based compensation arrangement by share-based payment award vesting description.

+ References

No definition available.

+ Details

Name:	seas_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingDescription
Namespace Prefix:	seas_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of paid and unpaid cash dividends declared and applicable to holders of share-based compensation, for example, but not limited to, non-vested shares, stock options, or restricted stock units.

+ References

No definition available.

+ Details

Name:	us-gaap_DividendsShareBasedCompensationCash
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Date the subsidiary or equity investee issued or sold stock, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockTransactionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of vesting of share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandThirteenOmnibusIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSeventeenOmnibusIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSeventeenBonusPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSixteenBonusPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSeventeenLongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSeventeenLongTermIncentivePlanBelowThresholdPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSeventeenLongTermIncentivePlanThresholdPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSeventeenLongTermIncentivePlanForTargetPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSeventeenLongTermIncentivePlanAtOrAboveMaximumPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_LongTermIncentivePlanBelowThresholdPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_LongTermIncentivePlanThresholdPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_LongTermIncentivePlanForTargetPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_LongTermIncentivePlanAtOrAboveMaximumPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_TwoPointTwoFivePerformanceRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_TwoPointSevenFivePerformanceRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=seas_ClosingOfStockSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_ModificationOfVestingConditionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_BonusPerformanceRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_BelowThresholdPerformanceBonusRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_ThresholdPerformanceBonusRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_TargetPerformanceBonusRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_AtOrAboveMaximumPerformanceBonusRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_LongTermIncentiveTimeRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_ExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSixteenAndTwoThousandFifteenLongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_ThirdAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_FourthAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_FifthAnniversaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_EmployeeStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_LongTermIncentivePerformanceRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandFifteenAndTwoThousandSixteenLongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_MaximumPerformanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_FiscalYearTwentySixteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_FiscalYearTwentyEighteenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_TwoThousandSixteenLongTermIncentivePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_LongtermIncentiveOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=seas_TimeVestingRestrictedSharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=seas_OtherGrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=seas_BoardMembersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VestingAxis=seas_ShareBasedCompensationAwardTrancheFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Equity-Based Compensation - Additional Information (Detail)				1 Months Ended	3 Months Ended				9 Months Ended		12 Months Ended
	Jun. 14, 2017 shares	May 08, 2017 USD ($)	Mar. 03, 2017 shares	Apr. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) shares	Jun. 30, 2017 USD ($)	Mar. 31, 2017 Executive $ / shares	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($)	Dec. 31, 2017	Dec. 31, 2016 USD ($) shares	Jun. 13, 2017 shares	Apr. 01, 2016 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense \| $					$ 3,245,000			$ 2,545,000	$ 19,265,000	$ 34,596,000
Unrecognized equity compensation cost \| $					$ 33,400,000				$ 33,400,000
Unvested shares of common stock					4,449,475				4,449,475
Accumulated dividends paid related to performance shares which vested during the period \| $									$ 1,270,000
2013 Omnibus Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock reserved for future issuance, gross													15,000,000
Shares available for future issuance					0				0
2017 Omnibus Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares available for future issuance					7,269,698				7,269,698
Additional shares of authorized for issuance									0
2017 Bonus Plan [Member] \| Scenario, Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of bonus payable by cash											50.00%
2016 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of bonus payable by cash												50.00%
2017 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares									587,947
2017 Long-Term Incentive Plan Below Threshold Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									0.00%
2017 Long-Term Incentive Plan Threshold Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									50.00%
2017 Long-Term Incentive Plan Target Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									100.00%
2017 Long-Term Incentive Plan At or Above Maximum Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									200.00%
Long-Term Incentive Plan Below Threshold Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									0.00%
Long-Term Incentive Plan Threshold Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									50.00%
Long-Term Incentive Plan Target Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									100.00%
Long-Term Incentive Plan At or Above Maximum Performance [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									200.00%
2.25x Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized equity-based compensation expense \| $										$ 27,516,000
Unvested shares of common stock														1,370,821
Accumulated dividends paid related to performance shares which vested during the period \| $				$ 3,400,000
2.75x Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Sale of stock percentage closing date									May 08, 2017
Unvested shares of common stock					628,293				628,293			1,310,726
2.75x Performance Restricted Shares [Member] \| Upon Closing of Sale [Member] \| Modification of Vesting Conditions [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized equity-based compensation expense \| $		$ 8,400,000
Accumulated dividends paid related to performance shares which vested during the period \| $						$ 1,300,000
Percentage of restricted shares to vest							60.00%
Number of senior executives agreed to forfeit \| Executive							8
Percentage of restricted shares to forfeit by executives							40.00%
Acquisition price paid per share \| $ / shares							$ 23.00
2.75x Performance Restricted Shares [Member] \| Upon Closing of Sale [Member] \| Modification of Vesting Conditions [Member] \| Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized equity-based compensation expense \| $									$ 8,400,000
Bonus Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares			888,235						912,986
Unvested shares of common stock					857,464				857,464			451,289
Bonus Performance Restricted Shares [Member] \| 2017 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity grant effective date			Mar. 03, 2017
Bonus Performance Restricted Shares [Member] \| 2017 Bonus Plan [Member] \| Scenario, Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage of bonus payable by shares											50.00%
Performance goals											Based upon the Company’s achievement of specified performance goals with respect to Fiscal 2017 Adjusted EBITDA (weighted at 50%), Total Revenue (weighted at 30%) and Adjusted EBITDA Margin (weighted at 20%).
Adjusted EBITDA performance goal weight											50.00%
Total revenue performance goal weight											30.00%
Adjusted EBITDA margin performance goal weight											20.00%
Bonus Performance Restricted Shares [Member] \| 2016 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense \| $												$ 0
Percentage of bonus payable by shares												50.00%
Below Threshold Performance Bonus Restricted Shares [Member] \| 2017 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									0.00%
Threshold Performance Bonus Restricted Shares [Member] \| 2017 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									30.00%
Target Performance Bonus Restricted Shares [Member] \| 2017 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									100.00%
At or Above Maximum Performance Bonus Restricted Shares [Member] \| 2017 Bonus Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									200.00%
Long-Term Incentive Time Restricted Shares [Member] \| 2017 Long-Term Incentive Plan [Member] \| Executives [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period									5 years
Long-Term Incentive Time Restricted Shares [Member] \| 2016 and 2015 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period									4 years
Vesting percentage, per year									25.00%
Long-Term Incentive Time Restricted Shares [Member] \| Third Anniversary [Member] \| 2017 Long-Term Incentive Plan [Member] \| Executives [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									33.00%
Long-Term Incentive Time Restricted Shares [Member] \| Fourth Anniversary [Member] \| 2017 Long-Term Incentive Plan [Member] \| Executives [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									33.00%
Long-Term Incentive Time Restricted Shares [Member] \| Fifth Anniversary [Member] \| 2017 Long-Term Incentive Plan [Member] \| Executives [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage, per year									33.00%
Long-Term Incentive Time Restricted Shares [Member] \| Employees [Member] \| Third Anniversary [Member] \| 2017 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period									3 years
Vesting percentage, per year									100.00%
Long-Term Incentive Performance Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity-based compensation expense \| $									$ 0
Granted shares									791,108
Unvested shares of common stock					893,425				893,425			212,369
Long-Term Incentive Performance Restricted Shares [Member] \| 2017 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Adjusted EBITDA performance goal weight									50.00%
Total revenue performance goal weight									30.00%
Performance period									3 years
Return on invested capital performance goal weight									20.00%
Long-Term Incentive Performance Restricted Shares [Member] \| 2015 and 2016 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance period									3 years
Shares earned, percentage									33.00%
Long-Term Incentive Performance Restricted Shares [Member] \| Maximum Performance [Member] \| 2016 and 2015 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awarded shares									411,547
Long-Term Incentive Performance Restricted Shares [Member] \| Fiscal 2016 [Member] \| 2016 and 2015 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares									137,183
Long-Term Incentive Performance Restricted Shares [Member] \| Fiscal 2018 [Member] \| 2016 Long-Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Awarded shares									106,069
Long-Term Incentive Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period									4 years
Vesting percentage, per year									25.00%
Long-Term Incentive Options, expiration period									10 years
Time-Vesting Restricted Shares [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares									1,185,276
Unvested shares of common stock					1,964,224				1,964,224			1,323,025
Time-Vesting Restricted Shares [Member] \| Other Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares					214,580
Time-Vesting Restricted Shares [Member] \| Other Grants [Member] \| Board Members [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares	56,232
Vesting percentage, per year	100.00%
Time-Vesting Restricted Shares [Member] \| Tranche One [Member] \| Other Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares					170,601
Vesting percentage, per year					50.00%
Vesting description					vest 50% on each of the two anniversaries
Time-Vesting Restricted Shares [Member] \| Tranche Two [Member] \| Other Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares					15,000
Vesting percentage, per year					100.00%
Vesting description					vest 100% on the first anniversary
Time-Vesting Restricted Shares [Member] \| Tranche Three [Member] \| Other Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares					23,979
Vesting percentage, per year					100.00%
Vesting date					Oct. 11, 2018
Time-Vesting Restricted Shares [Member] \| Tranche Four [Member] \| Other Grants [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted shares					5,000
Vesting percentage, per year					100.00%
Vesting date					Mar. 31, 2018