Benefit Plans - Changes in Projected Benefit Obligation (Detail) - Pension Plans [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	$ 303,918	$ 273,148
Service cost	5,484	2,553	$ 461
Interest cost	11,350	11,938	12,182
Actuarial (gain) / loss	(29,692)	27,388
Benefits paid	(12,103)	(11,109)
Benefit obligation at end of year	$ 278,957	$ 303,918	$ 273,148

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

+ References

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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