v3.26.1
NET EARNINGS (LOSS) PER SHARE - Reconciliation of earnings and share amounts to compute basic and diluted earnings per share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 27, 2026
Jun. 28, 2025
Jun. 27, 2026
Jun. 28, 2025
NET EARNINGS (LOSS) PER SHARE        
Net earnings (loss) attributable to Valmont Industries, Inc. $ 119,918 $ (4,020) $ 227,951 $ 83,241
Change in redemption value of redeemable noncontrolling interests   (26,243)   (26,243)
Net earnings (loss) attributable to Valmont Industries, Inc. including change in redemption value of redeemable noncontrolling interests $ 119,918 $ (30,263) $ 227,951 $ 56,998
Weighted average shares outstanding (in thousands):        
Basic (in shares) 19,368,000 19,809,000 19,421,000 19,928,000
Dilutive effect of various stock awards (in shares) 152,000   150,000 135,000
Diluted (in shares) 19,520,000 19,809,000 19,571,000 20,063,000
Net earnings attributable to Valmont Industries, Inc. per share:        
Basic (in dollars per share) $ 6.19 $ (1.53) $ 11.74 $ 2.86
Dilutive effect of various stock awards (in dollars per share) (0.05)   (0.09) (0.02)
Diluted (in dollars per share) $ 6.14 $ (1.53) $ 11.65 $ 2.84
Outstanding stock options with exercise prices exceeding the market price of common stock, excluded from the computation of diluted earnings per share (in shares)     0 39,543