Annual report pursuant to Section 13 and 15(d)

Acquisition of TNT Energy, LLC - Purchase Price Allocation (Parenthetical) (Detail)

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Acquisition of TNT Energy, LLC - Purchase Price Allocation (Parenthetical) (Detail) - USD ($)
$ in Millions
3 Months Ended
May 06, 2017
Jun. 30, 2017
TNT    
Business Acquisition [Line Items]    
Increase in goodwill related to adjustments in working capital $ 1.7 $ 0.1