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EARNINGS PER SHARE (Details) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2018 | Apr. 01, 2017
Basic EPS |  |
Net earnings attributable to Valmont Industries, Inc. | $ 39,281,000 | $ 38,979,000
Shares outstanding basic (in shares) | 22,609,000 | 22,472,000
Per share amount basic (in dollars per share) | $ 1.74 | $ 1.73
Dilutive Effect of Stock Options |  |
Dilutive Effect of Stock Options | $ 0 | $ 0
Dilutive effect of stock options number of shares (in shares) | 187,000 | 188,000
Dilutive effect of stock options (in dollars per share) | $ (0.02) | $ (0.01)
Diluted EPS |  |
Diluted EPS | $ 39,281,000 | $ 38,979,000
Shares outstanding dilutive (in shares) | 22,796,000 | 22,660,000
Per share amount diluted (in dollars per share) | $ 1.72 | $ 1.72
Antidilutive Securities |  |
Outstanding stock options with exercise prices exceeding the market price of common stock, excluded from the computation of diluted earnings per share (in shares) |  | 147,554

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