Benefit Plans - Changes in Projected Benefit Obligation (Detail) - Pension Plans [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Defined Benefit Plan Disclosure [Line Items]
Benefit obligation at beginning of year	$ 273,148	$ 261,469
Service cost	2,553	461	$ 116
Interest cost	11,938	12,182	11,875
Actuarial loss	27,388	8,268
Benefits paid	(11,109)	(9,232)
Benefit obligation at end of year	$ 303,918	$ 273,148	$ 261,469