Income Taxes (Details 2) (USD $)	12 Months Ended
Dec. 28, 2014	Dec. 29, 2013
Income Taxes
Accrued liabilities	$ 12,319,000	$ 10,584,000
Accrued bonuses	3,624,000	4,153,000
Other assets and liabilities	11,109,000us-gaap_DeferredTaxAssetsOther	10,209,000us-gaap_DeferredTaxAssetsOther
Equity awards	6,494,000	5,974,000
Other	3,730,000	3,992,000
Foreign net operating losses	6,322,000	7,233,000
Valuation allowance on foreign net operating losses and foreign deferred tax assets	(2,932,000)	(7,682,000)
Total deferred tax assets	40,666,000us-gaap_DeferredTaxAssetsNet	34,463,000us-gaap_DeferredTaxAssetsNet
Deferred expenses	(6,141,000)	(5,655,000)
Accelerated depreciation	(21,425,000)	(16,838,000)
Goodwill	(15,725,000)	(13,953,000)
Other	(7,401,000)us-gaap_DeferredTaxLiabilitiesOther	(4,673,000)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	(50,692,000)us-gaap_DeferredTaxLiabilities	(41,119,000)us-gaap_DeferredTaxLiabilities
Net deferred (liability) asset	(10,026,000)us-gaap_DeferredTaxAssetsLiabilitiesNet	(6,656,000)us-gaap_DeferredTaxAssetsLiabilitiesNet
Foreign tax net operating loss carryovers	29,700,000	34,000,000
Decrease in valuation allowance	$ 4,800,000

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee bonuses.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from other provisions, reserves, allowances, and accruals not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

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

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Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.

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Amount of deferred tax liability attributable to taxable temporary differences from capitalized costs.

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Amount of deferred tax liability attributable to taxable temporary differences from goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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