Property, Plant and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense	$ 60,397,000us-gaap_Depreciation	$ 58,338,000us-gaap_Depreciation	$ 61,168,000us-gaap_Depreciation
Depreciation expense reduction due to change in useful lives		1,700,000
Change to earnings per share basic for depreciation expense reduction from change in useful lives		$ 0.11
Change to earnings per share diluted for depreciation expense reduction from change in useful lives		$ 0.11
Impairment expense	$ 0us-gaap_AssetImpairmentCharges	$ 0us-gaap_AssetImpairmentCharges	$ 0us-gaap_AssetImpairmentCharges
Class B Common Stock [Member]
Property, Plant and Equipment [Line Items]
Change to earnings per share basic for depreciation expense reduction from change in useful lives		$ 0.11
Change to earnings per share diluted for depreciation expense reduction from change in useful lives		$ 0.11

The adjustment to depreciation expense recognized in the current period for a change in the estimated useful lives.

No definition available.

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- Definition

Earnings per share basic adjustment for depreciation expense reduction from change in useful lives.

+ References

No definition available.

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- Definition

Earnings per share diluted adjustment for depreciation expense reduction from change in useful lives.

+ References

No definition available.

+ Details

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228

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- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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