Benefit Plans - Change in Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	$ 213,378
Fair value of plan assets at end of year	227,549	$ 213,378
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets at beginning of year	214,055	212,692
Actual return on plan assets	12,313	(829)
Employer contributions	11,120	10,500
Benefits paid	(9,232)	(8,308)
Fair value of plan assets at end of year	$ 228,256	$ 214,055