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Long-Term Debt - Additional Information (Detail)	1 Months Ended		12 Months Ended
	Nov. 30, 2015 USD ($)	Jan. 31, 2015 USD ($) Tranche	Jan. 02, 2016 USD ($)	Jan. 03, 2015 USD ($)
Debt Instrument [Line Items]
Maintenance of excess borrowing base			10.00%
Current borrowing available under credit facility			$ 334,300,000	$ 406,800,000
Weighted average interest rate of convertible senior notes			3.90%
Minimum [Member]
Debt Instrument [Line Items]
Unused portion of loan commitments rate			0.25%
Maximum [Member]
Debt Instrument [Line Items]
Unused portion of loan commitments rate			0.375%
Amended Credit Facility [Member]
Debt Instrument [Line Items]
Available borrowings under credit facility		$ 1,000,000,000
Number of tranches | Tranche		3
Additional borrowings available under credit facility		$ 400,000,000
Notes maturity date			Nov. 19, 2018
6.625% Senior Notes Due December 2016 [Member]
Debt Instrument [Line Items]
Principal amount of senior notes	$ 50,000,000
Senior notes, rate	6.625%
Redemption price (expressed as percentage of the principal amount)	101.65625%
Expected redemption premium and write-off unamortized issuance costs	$ 1,200,000
Debt instrument redemption, expected to decrease in annual interest expense	$ 2,000,000
Line of Credit [Member] | Amended Credit Facility [Member]
Debt Instrument [Line Items]
Decrease in debt instrument applicable margin interest rate		(0.25%)
Tranche A [Member]
Debt Instrument [Line Items]
Secured revolving credit facility			$ 360,973
Tranche A-1 [Member]
Debt Instrument [Line Items]
Secured revolving credit facility			34,008
Tranche A-2 [Member]
Debt Instrument [Line Items]
Secured revolving credit facility			34,843
Revolving credit agreement [Member]
Debt Instrument [Line Items]
Secured revolving credit facility			429,800,000	450,200,000
Revolving credit agreement [Member] | Tranche A [Member] | Amended Credit Facility [Member]
Debt Instrument [Line Items]
Available borrowings under credit facility			900,000,000
Revolving credit agreement [Member] | Tranche A-1 [Member]
Debt Instrument [Line Items]
Available borrowings under credit facility		$ 40,000,000
Revolving credit agreement [Member] | Tranche A-2 [Member]
Debt Instrument [Line Items]
Secured revolving credit facility		$ 60,000,000
Letter of credit [Member]
Debt Instrument [Line Items]
Unused borrowing capacity			$ 11,100,000	$ 11,500,000

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Debt instrument redemption, expected to decrease in annual interest expense.

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Expected redemption premium and write-off of unamortized issuance costs.

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Line of credit facility additional borrowing capacity.

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Line of credit facility percentage of maintenance of excess borrowing base.

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Number of tranches.

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
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Incremental percentage increase (decrease) in the stated rate on a debt instrument.

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

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.22(a)(1))
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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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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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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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-Number 210
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-Paragraph 19, 20, 22
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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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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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Weighted average interest rate of long-term debt outstanding.

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