Amount of incremental credit facility which will result in modification of debt covenants

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Swingline Loan, Maximum Borrowing Capacity

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Unsecured debt, net of debt issuance costs

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The amount of a specific compensating balance arrangement that is maintained under an agreement for a bank loan or future credit availability.

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

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States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

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Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

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

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Amount of the required periodic payments including both interest and principal payments.

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Amount, after accumulated amortization, of debt issuance costs. 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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The effective interest rate at the end of the reporting period.

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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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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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Maximum month-end amount borrowed under the credit facility during the period.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Senior Credit Facility - Credit Agreement (Details) - USD ($)						3 Months Ended
	Jun. 29, 2019	Dec. 29, 2018	Jun. 30, 2018	Jun. 15, 2017	Feb. 19, 2016	Jun. 29, 2019
Line of Credit Facility [Line Items]
Unsecured Debt	$ 490,000,000.0	$ 408,800,000	$ 543,000,000.0			$ 490,000,000.0
Unamortized Debt Issuance Costs	(1,200,000)	(1,400,000)	(1,600,000)			(1,200,000)
Unsecured debt, net of debt issuance costs	488,800,000	407,400,000	541,400,000			488,800,000
Unsecured Debt, Current	(22,500,000)	(26,250,000)	(25,000,000)			(22,500,000)
Long-term Debt, Excluding Current Maturities	466,290,000	381,100,000	516,410,000			466,290,000
Letters of Credit Outstanding, Amount	37,300,000	33,500,000	39,900,000			37,300,000
Senior credit facility, maximum borrowing capacity	500,000,000				$ 500,000,000	$ 500,000,000
Swingline Loan, Maximum Borrowing Capacity	$ 50,000,000				50,000,000
Debt instrument, basis spread on variable rate						0.75%
Commitment fee for unused capacity	0.125%
Debt Instrument, Interest Rate, Stated Percentage - June 2017 Term Loan	1.00%					1.00%
Compensating Balance, Amount	$ 0					$ 0
Debt Instrument, Covenant Compliance	all
Amount of incremental credit facility which will result in modification of debt covenants						$100 million or greater
Base Rate
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End	5.50%					5.50%
London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate at Period End	2.398%					2.398%
Minimum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate						0.50%
Commitment fee for unused capacity						0.075%
Maximum
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate						1.125%
Commitment fee for unused capacity						0.20%
February 2016 Term Loan
Line of Credit Facility [Line Items]
Notional Amount, Current	$ 150,000,000.0	165,000,000.0	170,000,000.0			$ 150,000,000.0
Term Loan, Maximum Borrowing Capacity					$ 200,000,000
Due in years one and two February 2016 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Amount of Periodic Payment						10,000,000
Due in years three through Maturity February 2016 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Amount of Periodic Payment						20,000,000
June 2017 Term Loan
Line of Credit Facility [Line Items]
Notional Amount, Current	90,000,000.0	93,800,000	95,000,000.0			90,000,000.0
Term Loan, Maximum Borrowing Capacity				$ 100,000,000
Due in years one and two June 2017 Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Amount of Periodic Payment						5,000,000
Due in years three through five June 2017 Term Loan [Member] [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Amount of Periodic Payment						$ 10,000,000
Number of Financial Covenants [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Covenant Description						two material covenants
2016 Senior Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Month-end Outstanding Amount	$ 100,000,000.0	$ 0	$ 128,000,000.0
Fixed Charge Coverage Ratio Minimum Requirement [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Covenant Description						2.00 to 1.0
Leverage Ratio Maximum Requirement [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Covenant Description						4.00 to 1.0