Derivative Instruments and Hedging Activities - Effects on Statement of Income and Amounts Recognized In and Reclassified From AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 28, 2019	Dec. 29, 2018
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in AOCI (Effective Portion), Net of Tax	$ 1,176
Gain Reclassified from AOCI (Effective Portion), Net of Tax	(486)
Loss Recognized in AOCI (Effective Portion), Net of Tax		$ (802)
Gain Reclassified from AOCI (Effective Portion), Net of Tax		(371)
Commodity Contract [Member] \| Not Designated as Hedging Instrument [Member] \| Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain on commodity contracts (nonqualifying)	2,443	4,227
Commodity Contract [Member] \| Fair Value Hedging [Member] \| Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on the derivatives in designated and qualifying fair value hedges	0	391
Commodity Contract [Member] \| Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in AOCI (Effective Portion), Net of Tax	1,161
Loss Recognized in AOCI (Effective Portion), Net of Tax		(793)
Commodity Contract [Member] \| Cash Flow Hedging [Member] \| Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from AOCI (Effective Portion), Net of Tax	(486)
Gain Reclassified from AOCI (Effective Portion), Net of Tax		(371)
Inventories [Member] \| Fair Value Hedging [Member] \| Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on the derivatives in designated and qualifying fair value hedges	0	(385)
Other [Member] \| Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain Recognized in AOCI (Effective Portion), Net of Tax	15
Loss Recognized in AOCI (Effective Portion), Net of Tax		(9)
Other [Member] \| Cash Flow Hedging [Member] \| Other [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from AOCI (Effective Portion), Net of Tax	$ 0
Gain Reclassified from AOCI (Effective Portion), Net of Tax		$ 0

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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No definition available.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

+ References

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Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

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Amount, before tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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