Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258

+ Details

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

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
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Balance Type:
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- Details

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Balance Type:
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- Details

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Balance Type:
Period Type:

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Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
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Balance Type:
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- Details

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Debt - Summary of Debt and Capital Lease Obligations - General Information (Details) - USD ($)		9 Months Ended
	Jun. 26, 2018	Sep. 30, 2018	Dec. 31, 2017
Line of Credit [Member] \| Revolving Credit Facility [Member] \| $700 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 700,000,000	$ 700,000,000
Credit facility, maturity date		May 23, 2021
Unamortized deferred financing costs		$ 7,185,000	9,076,000
Line of Credit [Member] \| Revolving Credit Facility [Member] \| $700 Million Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Spread rate (as a percent)		1.55%
Secured Debt [Member] \| $200 Million Term Loan A [Member]
Debt Instrument [Line Items]
Face amount		$ 200,000,000	200,000,000
Credit facility, maturity date		May 23, 2022
Unamortized deferred financing costs		$ 1,305,000	1,557,000
Secured Debt [Member] \| $200 Million Term Loan A [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Spread rate (as a percent)		1.50%
Secured Debt [Member] \| $500 Million Term Loan B [Member]
Debt Instrument [Line Items]
Face amount		$ 500,000,000	500,000,000
Debt instrument, maturity date		May 11, 2024
Unamortized deferred financing costs		$ 5,527,000	7,595,000
Secured Debt [Member] \| $500 Million Term Loan B [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Spread rate (as a percent)	2.00%	2.00%
Secured Debt [Member] \| Revolving Credit Facility [Member] \| $500 Million Term Loan B [Member]
Debt Instrument [Line Items]
Face amount		$ 500,000,000
Senior Notes [Member] \| $350 Million 5% Senior Notes [Member]
Debt Instrument [Line Items]
Face amount		$ 350,000,000	350,000,000
Stated interest rate (as a percent)		5.00%
Debt instrument, maturity date		Apr. 15, 2021
Unamortized deferred financing costs		$ 2,624,000	3,340,000
Senior Notes [Member] \| $400 Million 5% Senior Notes [Member]
Debt Instrument [Line Items]
Face amount		$ 400,000,000	400,000,000
Stated interest rate (as a percent)		5.00%
Debt instrument, maturity date		Apr. 15, 2023
Unamortized deferred financing costs		$ 4,305,000	$ 4,929,000