Quarterly report pursuant to Section 13 or 15(d)

Impact of Derivative Activities on Condensed Consolidated Statements of Income (Detail)

v3.7.0.1
Impact of Derivative Activities on Condensed Consolidated Statements of Income (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Successor [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivatives $ 11,061   $ 28,077  
Predecessor [Member]        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivatives   $ (21,759)   $ (17,267)