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Income Taxes (Reconciliation of Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2016	Dec. 30, 2015	Dec. 31, 2014	Dec. 28, 2011
Reconciliation of income taxes at the U.S. federal statutory tax rate to effective tax rate:
Statutory provision rate	35.00%	35.00%	35.00%
State and local taxes, net of federal income tax benefit	9.00%	6.00%	3.00%
Foreign taxes, net of federal income tax benefit	0.00%	0.00%	1.00%
Wage addback on income tax credits earned	3.00%	2.00%	2.00%
General business credits generated	(9.00%)	(6.00%)	(6.00%)
Foreign tax credits generated	(12.00%)	(2.00%)	(0.00%)
Pension plan liquidation	18.00%	0.00%	0.00%
Other	2.00%	(2.00%)	(1.00%)
Release of valuation allowance	0.00%	0.00%	(1.00%)
Effective tax rate	46.00%	33.00%	33.00%
Tax benefit recognized with pension plan liquidation	$ 2,100
Pension settlement loss	(24,297)	$ 0	$ 0
Tax benefit recognized with reversal of the valuation allowance	(132)	$ 130	$ 270	$ 7,200
Tax benefit recognized with foreign tax credits	$ 3,700

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the pension plan liquidation.

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Amount of net gain (loss) recognized in net periodic benefit cost as a result of an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign tax credit.

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