ACQUISITIONS AND DECONSOLIDATION (Details 2) - USD ($) $ in Thousands	Oct. 06, 2014	Mar. 03, 2014
Valmont SM
Major classes of acquired intangible assets and weighted-average amortization periods
Amount		$ 30,340
Shakespeare
Major classes of acquired intangible assets and weighted-average amortization periods
Amount	$ 13,500
Backlog | Valmont SM
Major classes of acquired intangible assets and weighted-average amortization periods
Amount		$ 3,145
Weighted Average Amortization Period (Years)		1 year 6 months
Customer Relationships | Valmont SM
Major classes of acquired intangible assets and weighted-average amortization periods
Amount		$ 15,725
Weighted Average Amortization Period (Years)		12 years
Customer Relationships | Shakespeare
Major classes of acquired intangible assets and weighted-average amortization periods
Amount	$ 9,500
Weighted Average Amortization Period (Years)	12 years
Trade Names | Valmont SM
Major classes of acquired intangible assets and weighted-average amortization periods
Amount		$ 11,470
Trade Names | Shakespeare
Major classes of acquired intangible assets and weighted-average amortization periods
Amount	$ 4,000