ACQUISITIONS (Details) - USD ($) $ in Thousands	Aug. 01, 2015	Jan. 16, 2015	Dec. 31, 2015
Business Acquisition [Line Items]
Net assets acquired			$ 3,056
Harmonics Holdings Incorporated [Member]
Business Acquisition [Line Items]
Business acquisition, name of acquired entity		Harmonics Holdings Inc.
Business acquisition, effective date of acquisition		Jan. 16, 2015
Business combination location within acquiree's segment		T&D Solutions
Business combination primary form of consideration		Seller note/debt forgiveness
Net assets acquired		$ 1,043
Pacific Power Systems Integration Incorporated [Member]
Business Acquisition [Line Items]
Business acquisition, name of acquired entity	Pacific Power Systems Integration, Inc.
Business acquisition, effective date of acquisition	Aug. 01, 2015
Business combination location within acquiree's segment	T&D Solutions
Business combination primary form of consideration	Cash
Net assets acquired	$ 2,013