CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jun. 25, 2022	Jul. 01, 2023	Jun. 25, 2022
Statement of Comprehensive Income [Abstract]
Net earnings	$ 88,798	$ 77,207	$ 161,143	$ 140,113
Foreign currency translation adjustments:
Unrealized translation gain (loss)	11,967	(43,666)	20,156	(32,050)
Hedging activities:
Unrealized gain (loss) on commodity hedges	(1,339)	(19,512)	(2,815)	1,048
Realized (gain) loss on commodity hedges recorded in earnings	925	1,545	3,797	(498)
Unrealized gain (loss) on cross currency swaps	(760)	3,470	(1,351)	5,281
Amortization cost included in interest expense	(12)	(16)	(28)	(32)
Total hedging activities	(1,186)	(14,513)	(397)	5,799
Net gain on defined benefit pension plan	95	124	186	256
Other comprehensive income (loss)	10,876	(58,055)	19,945	(25,995)
Comprehensive income	99,674	19,152	181,088	114,118
Comprehensive (income) loss attributable to noncontrolling interests	233	932	2,135	(756)
Comprehensive income attributable to Valmont Industries, Inc.	$ 99,907	$ 20,084	$ 183,223	$ 113,362