UNIVERSAL ACQUISITION SPIG Proforma Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Revenues		$ 424,373	$ 1,660,986
Net income (loss) attributable to B&W		$ 10,602	(113,940)
Amortization of Intangible Assets	$ 6,012		$ 1,538
Basic earnings per common share		$ 0.21	$ (2.27)
Diluted earnings per common share		$ 0.20	$ (2.27)
Universal [Domain] [Domain]
Amortization		$ 1,400	$ 2,800
Interest Expense		$ (100)	(400)
Acquisition Costs, Period Cost			$ 500
Amortization of Intangible Assets	$ 1,500