Income Taxes [Line Items]

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible capital loss carryforwards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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-Paragraph 2
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- Definition

A brief description of status of the tax examination, significant findings to date, and the entity's position with respect to the findings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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- Definition

The sum of the amounts of estimated penalties and interest recognized in the period arising from income tax examinations.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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- Definition

The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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- Definition

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
-Glossary Carryforwards
-URI http://asc.fasb.org/extlink&oid=6506874

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- Definition

Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

+ References

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-Publisher FASB
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- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

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-Publisher FASB
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Income taxes - Narrative (Detail) - USD ($) $ in Thousands	12 Months Ended
Income taxes - Narrative (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 28, 2014	Dec. 29, 2013
Income Taxes [Line Items]
Capital loss carryforwards	$ 343,800
Deferred tax assets valuation allowance	184,413	$ 140,731
Unrecognized tax benefits that, if recognized, would impact effective tax rate	12,500	11,600
Recognized interest and the release of penalty reserves	400	3,400	$ 5,400
Accrued interest and penalties payable related to unrecognized tax benefits	1,700	$ 2,000
Estimated decrease in gross unrecognized tax positions within the next 12 months, maximum	3,800
Foreign
Income Taxes [Line Items]
Tax credit carryforward	$ 23,100
Federal
Income Taxes [Line Items]
Tax years subject to examination	The 2011 through 2015 tax years remain subject to examination by the Internal Revenue Service and state authorities.
State
Income Taxes [Line Items]
Tax years subject to examination	Tax years before 2011 remain subject to examination by certain states primarily due to the filing of amended tax returns as a result of the settlement of the Internal Revenue Service examination for these years and due to ongoing audits.