Ratio of adjusted earnings before interest, taxes, depreciation and amortization to cash interest charges

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- Definition

Credit facility maximum allowable consolidated leverage ratio as defined in the Company's Credit Agreement.

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Credit facility, maximum allowable consolidated leverage ratio multiple

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- Definition

Debt Instrument Interest Additional Interest Above Eurodollar Rate

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- Definition

Debt Instrument Interest Additional Interest Above Federal Fund Rate

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- Definition

Debt Instrument, Interest Rate at Period End

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- Definition

Line Of Credit Facility Additional Borrowing Capacity

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- Definition

Percentage of adjusted EBITDA that guarantor subsidiaries represent

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No definition available.

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Percentage of consolidated net revenues and adjusted EBITDA that guarantor wholly-owned subsidiaries represent

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No definition available.

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- Definition

Ratio of debt to earnings before interest, taxes, depreciation and amortization.

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No definition available.

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- Definition

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

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No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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No definition available.

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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- 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.

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No definition available.

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- Definition

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

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- Definition

Amount, before accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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- 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.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Weighted average interest rate of long-term debt outstanding calculated over time.

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No definition available.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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LONG-TERM OBLIGATIONS - Narrative (Details)		3 Months Ended		9 Months Ended
LONG-TERM OBLIGATIONS - Narrative (Details)	Jun. 29, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Debt Instrument [Line Items]
Consolidated leverage ratio		0.4		0.4
Consolidated interest coverage ratio		57.6		57.6
Credit facility, maximum borrowing capacity	$ 550,000,000
Principal payments of long-term obligations				$ 91,071,000	$ 4,069,000
Deferred debt issuance cost						$ 2,400,000
Principal amount		$ 59,800,000		59,800,000			$ 90,700,000
Term Loan [Member] \| 100 Million Term Loan
Debt Instrument [Line Items]
Debt instrument, face amount		100,000,000		$ 100,000,000
Weighted average interest rate (percent)			3.20%		3.00%
Maturity Date				Aug. 28, 2020
Swing Line Loan [Member]
Debt Instrument [Line Items]
Revolving Credit Facility Total	25,000,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Revolving Credit Facility Total	60,000,000
Revolving Credit Facility [Member] \| 550 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	550,000,000	$ 550,000,000.0		$ 550,000,000.0
Weighted average interest rate (percent)		3.60%		3.80%
Credit facility, maximum additional borrowing capacity	$ 125,000,000
Credit facility, maximum allowable consolidated leverage ratio multiple	0.5
Credit facility, maximum allowable consolidated leverage ratio	3.0
Maturity Date				Jun. 29, 2023
Remaining availability under revolving credit facility		$ 458,100,000		$ 458,100,000
Principal amount		57,500,000		$ 57,500,000			$ 0
Prior Credit Agreement [Member]
Debt Instrument [Line Items]
Principal payments of long-term obligations	$ 127,500,000
Credit Agreement [Member]
Debt Instrument [Line Items]
Additional interest rate above Federal Fund rate				0.50%
Additional interest rate above Eurodollar rate				1.00%
Percentage of consolidated revenue and adjusted EBITDA that guarantor wholly-owned subsidiaries represent				95.00%
Percentage of adjusted EBITDA that guarantor subsidiaries represent				70.00%
Line of Credit [Member] \| 550 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Outstanding letters of credit		$ 34,400,000		$ 34,400,000
Base Rate [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Description of variable rate basis				Fluctuating rate per annum equal to the highest of (a) the federal funds rate plus 0.50% per annum, (b) the prime rate of interest established by the Administrative Agent, and (c) the Eurodollar Rate for an interest period of one month plus 1% per annum.
Base Rate [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Eurodollar [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Description of variable rate basis				Rate at which Eurodollar deposits in the London interbank market for an interest period of one, two, three or six months
Eurodollar [Member] \| Revolving Credit Facility [Member] \| 550 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate at Period End		3.70%		3.70%
Eurodollar [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.50%