Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and Losses on Hedging Derivatives	$ 2,333	[1]	$ (132)	[2]	$ 973
Reclassification adjustment for (gain) loss on early retiree medical plan included in net earnings, net of income taxes of $49, ($108) and ($279) for 2019, 2018 and 2017, respectively	57	[1]	(350)	[2]	(415)
Reclassification adjustment for (gain) loss on settlement of hedging derivatives included in net earnings, tax effect	700		0		400
AOCI reclassification impact on tax	49		(108)		$ (279)
Cost of Products Sold [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive (loss) income into earnings, Gains and Losses on Hedging Derivatives	2,333		(132)
Reclassification adjustment for (gain) loss on early retiree medical plan included in net earnings, net of income taxes of $49, ($108) and ($279) for 2019, 2018 and 2017, respectively	57		(350)
Reclassification adjustment for (gain) loss on settlement of hedging derivatives included in net earnings, tax effect	700		0
AOCI reclassification impact on tax	$ 49		$ (108)

[1] Includes $2,333 and 57 net-of-tax impact of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts and adjustment to early retiree medical plan, respectively. The tax impacts of these reclassifications were $700 and $49, respectively.

[2] Includes ($132) and ($350) net-of-tax impact of accumulated other comprehensive income reclassifications into cost of products sold for net losses on commodity contracts and adjustment to early retiree medical plan, respectively. The tax impacts of these reclassifications were $0 and ($108), respectively