DESCRIPTION OF THE BUSINESS AND BASIS OF PRESENTATION (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jul. 31, 2016	Jul. 31, 2016	Jul. 31, 2015
Power Industry Services
Description of the Business
Unapproved change orders contract amount	$ 4.0	$ 4.0
Outstanding litigation settled amount	$ 12.9
Power Industry Services | Minimum
Description of the Business
Revenue recognition period		3 months
Power Industry Services | Maximum
Description of the Business
Revenue recognition period		3 years
GPS
Description of the Business
Consolidated revenues by subsidiaries		84.00%	95.00%