CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2022	Mar. 27, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 62,906	$ 55,001
Foreign currency translation adjustments:
Unrealized translation gain (loss)	11,062	(12,633)
Gain (loss) on hedging activities:
Cash flow hedges	0	22
Amortization cost included in interest expense	(16)	(16)
Commodity hedges	20,560	9,946
Realized gain on commodity hedges recorded in earnings	(2,043)	0
Cross currency swaps	1,811	3,606
Total gain (loss) on hedging activities	20,312	13,558
Actuarial gain on defined benefit pension plan	686	832
Other comprehensive income	32,060	1,757
Comprehensive income	94,966	56,758
Comprehensive (income) loss attributable to noncontrolling interests	(1,688)	486
Comprehensive income attributable to Valmont Industries, Inc.	$ 93,278	$ 57,244