Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail)

v3.8.0.1
Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Share [Abstract]    
Net loss $ (231,459) $ (96,655)
Basic and diluted (in shares) 188,536 95,795
Loss per share:    
Basic and diluted (in dollars per share) $ (1.23) $ (1.01)