Summary of AOCI exclusive of reclassification (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax	$ 8,457	$ 2,978	$ (6,789)
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax	457	(16,853)	(9,426)
Derivative Instruments
Accumulated Other Comprehensive Income Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments before tax	11,313	3,984	(9,734)
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments tax benefit (expense)	(2,856)	(1,006)	2,945
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax	8,457	2,978	(6,789)
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax	8,457	2,978
Current Year Actuarial Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax	(10,702)	(26,528)	(4,307)
Accumulated Defined Benefit Plans Adjustment
Accumulated Other Comprehensive Income Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI, Current year, before tax	(10,702)	(26,528)	(4,307)
Amount of Gain (Loss) Recognized in AOCI, Current year, tax benefit (expense)	2,702	6,697	1,670
Amount of Gain (Loss) Recognized in AOCI, Current year, net of tax	(8,000)	(19,831)	(2,637)
Commodity Contract
Accumulated Other Comprehensive Income Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments net of tax	8,457	2,978	(6,789)
Commodity Contract | Derivative Instruments
Accumulated Other Comprehensive Income Loss [Line Items]
Amount of Gain (Loss) Recognized in AOCI, Derivative instruments before tax	$ 11,313	$ 3,984	$ (9,734)