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Long-Term Debt - Additional Information (Detail)		12 Months Ended
	Dec. 18, 2018 USD ($) Tranche	Dec. 29, 2018 USD ($)	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Unused portion of loan commitments rate		0.25%
Maintenance of excess borrowing base		10.00%
Current borrowing available under credit facility		$ 262,000,000	$ 132,700,000
Weighted average interest rate of convertible senior notes		4.08%
Credit Agreement [Member]
Debt Instrument [Line Items]
Additional borrowings available under credit facility	$ 325,000,000
Number of tranches | Tranche	3
Tranche A [Member] | Minimum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate		1.25%
Tranche A [Member] | Maximum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate		1.50%
Tranche A-1 [Member] | Minimum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate		2.25%
Tranche A-1 [Member] | Maximum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate		2.50%
Tranche A-2 [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate		5.25%
Revolving credit agreement [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Notes maturity date	Dec. 20, 2021
Revolving credit agreement [Member] | Credit Agreement [Member] | Extended Maturity [Member]
Debt Instrument [Line Items]
Notes maturity date	Dec. 18, 2023
Revolving credit agreement [Member] | Tranche A [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Available borrowings under credit facility	$ 975,000,000			$ 900,000,000
Revolving credit agreement [Member] | Tranche A-1 [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Available borrowings under credit facility				$ 40,000,000
Revolving credit agreement [Member] | Tranche A-1 [Member] | Credit Agreement [Member] | Minimum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate	2.25%
Revolving credit agreement [Member] | Tranche A-1 [Member] | Credit Agreement [Member] | Maximum [Member] | LIBOR [Member]
Debt Instrument [Line Items]
LIBOR plus interest rate	2.50%
Revolving credit agreement [Member] | Tranche A-2 [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Available borrowings under credit facility	$ 60,000,000
Letter of credit [Member]
Debt Instrument [Line Items]
Unused borrowing capacity		$ 11,700,000	$ 9,200,000

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- Definition

Line of credit facility additional borrowing capacity.

+ References

No definition available.

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

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- 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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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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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