The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The pretax net amount of gains and losses that are not yet recognized as a component of net periodic benefit cost, and that are recognized as increases or decreases in other comprehensive income as they arise. Gains and losses are due to changes in the value of either the benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption, or the consequence of a decision to temporarily deviate from the substantive plan.

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Amount related to the pretax cost of benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation, which has not yet been recognized as components of net periodic benefit cost.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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The amount of contributions made by plan participants. This item represents a periodic increase to the plan obligation and an increase to plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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Amount of the period's gross receipts received from the prescription drug subsidy, which is to be used in the roll forward of the accumulated postretirement benefit obligation of an applicable postretirement benefit plan.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The amount of increase or decrease due to a change in the terms of an existing plan or the initiation of a new plan. A plan amendment may increase or decrease benefits, including those attributed to years of service already rendered.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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The amount of decrease that relates to 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 (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts.

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For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

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This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

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Funded Status and Amounts Recognized in Consolidated Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Jan. 03, 2015	Dec. 28, 2013	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Participant contributions	$ 400
Fair value of plan assets at beginning of year				378,194	428,605
Actual return on plan assets	41,900
Participant contributions	400
Fair value of plan assets at end of year				378,194	428,605
Fair value of plan assets				378,194	428,605
Current liability		(1,089)	(1,301)
Noncurrent liability		(93,589)	(44,226)
Net Periodic Pension Cost
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at beginning of year		463,726	514,636
Service cost	610	640	708
Interest cost	21,670	21,427	20,089
Actuarial loss (gain)		52,305	(46,213)
Benefits paid	(24,884)	(27,046)	(25,494)
Settlements		(48,413)
Benefit obligation at end of year	514,636	462,639	463,726
Fair value of plan assets at beginning of year		428,605	365,671
Actual return on plan assets		11,613	73,174
Employer contribution		13,435	15,254
Benefits paid	(24,884)	(27,046)	(25,494)
Settlements		(48,413)
Fair value of plan assets at end of year	365,671	378,194	428,605
Fair value of plan assets	365,671	378,194	428,605
Benefit obligations	514,636	462,639	463,726
Unfunded status and amount recognized at end of year		(84,445)	(35,121)
Current liability		(409)	(418)
Noncurrent liability		(84,036)	(34,703)
Amount recognized at end of year		(84,445)	(35,121)
Net actuarial (gain) loss before taxes		144,842	87,645
Accumulated benefit obligation at end of year		460,931	462,754
Net Periodic Postretirement Benefit Cost
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at beginning of year		10,406	11,481
Service cost	458	377	341
Interest cost	605	445	380
Participant contributions		192	364
Actuarial loss (gain)		(521)	214
Benefits paid		(670)	(1,316)
Less federal subsidy on benefits paid			52
Plan amendments			(1,110)
Benefit obligation at end of year	11,481	10,229	10,406
Employer contribution		478	952
Participant contributions		192	364
Benefits paid		(670)	(1,316)
Benefit obligations	11,481	10,229	10,406
Unfunded status and amount recognized at end of year		(10,229)	(10,406)
Current liability		(680)	(883)
Noncurrent liability		(9,549)	(9,523)
Amount recognized at end of year		(10,229)	(10,406)
Net actuarial (gain) loss before taxes		(3,056)	(3,135)
Prior service (credit) cost before taxes		(953)	(1,422)
Accumulated benefit obligation at end of year		$ (4,009)	$ (4,557)