Defined Benefit Pension Plans - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Disclosure Defined Benefit Pension Plans Components Of Net Periodic Benefit Cost And Other Amounts Recognized In Other Comprehensive Loss [Abstract]
Service cost	$ 2,216	$ 1,856	$ 2,478
Interest cost	40,830	42,061	49,202
Expected return on assets	(41,780)	(47,621)	(55,127)
Curtailments	154	(489)	0
Settlement cost	23	115	25
Amortization of:
Prior service cost	9	9	22
Net actuarial loss	19,053	17,052	14,551
Net periodic benefit cost	20,505	12,983	11,151
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Net loss	15,186	41,921	3,813
Prior service credit (cost)	(380)	(9)	22
Total loss recognized in other comprehensive income	14,806	41,912	3,835
Total recognized in net periodic benefit cost and other comprehensive income	$ 35,311	$ 54,895	$ 14,986