Accumulated Other Comprehensive Income or Loss - Schedule Of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, value	$ 790,779	$ 747,253	$ 706,873
Other comprehensive loss before reclassifications	(643)	(455)	(8,195)
Income tax benefit	236	114	3,138
Other comprehensive loss, net of tax, before reclassifications	(407)	(341)	(5,057)
Amortization of amounts included in net periodic benefit cost	657	884	3,410
Income tax expense	(240)	(335)	(1,214)
Amounts reclassified out of AOCI, net of tax	417	549	2,196
Other comprehensive income (loss), net of tax	10	208	(2,861)
Balance, value	825,407	790,779	747,253
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, value	(11,447)	(11,655)	(8,794)
Other comprehensive income (loss), net of tax	10	208	(2,861)
Balance, value	$ (11,437)	$ (11,447)	$ (11,655)