Quarterly report pursuant to Section 13 or 15(d)

Derivatives and Fair Value (IS) (Detail)

v3.5.0.2
Derivatives and Fair Value (IS) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2016
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other, net [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Gain (Loss) on Derivative, Net $ (578) $ (578)