CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Jun. 25, 2022	Jun. 26, 2021
Statement of Comprehensive Income [Abstract]
Net earnings	$ 77,207	$ 62,657	$ 140,113	$ 117,658
Foreign currency translation adjustments:
Unrealized translation gain (loss)	(43,666)	10,690	(32,050)	(1,943)
Gain (loss) on hedging activities:
Cash flow hedges	0	(313)	0	(291)
Amortization cost included in interest expense	(16)	(16)	(32)	(32)
Commodity hedges	(19,512)	16,308	1,048	26,254
Realized (gain) loss on commodity hedges recorded in earnings	1,545	(270)	(498)	(270)
Cross currency swaps	3,470	(2,095)	5,281	1,511
Actuarial gain on defined benefit pension plan	124	843	256	1,675
Other comprehensive income (loss)	(58,055)	25,147	(25,995)	26,904
Comprehensive income	19,152	87,804	114,118	144,562
Comprehensive (income) loss attributable to noncontrolling interests	932	(1,573)	(756)	(1,087)
Comprehensive income attributable to Valmont Industries, Inc.	$ 20,084	$ 86,231	$ 113,362	$ 143,475