Computation of Basic and Diluted Net (Loss) Income Per Common Share (Parenthetical) (Detail) shares in Millions |
12 Months Ended |
---|---|
Dec. 31, 2017
$ / shares
shares
| |
Convertible Notes | |
Net Income Loss Per Common Share | |
Initial debt conversion price | $ / shares | $ 31.80 |
Shares that would be issued upon conversion | shares | 14.5 |
Convertible Notes Hedge Warrant | |
Net Income Loss Per Common Share | |
Initial debt conversion price | $ / shares | $ 39.91 |
Shares that would be issued upon conversion | shares | 14.5 |