Earnings (Loss) per Common Share - Computation of Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Earnings (loss) per common share—basic |
|
|
|
|
| Net income (loss) |
$ (5,866)
|
$ (3,617)
|
$ 66,629
|
$ 45,020
|
| Weighted-average common shares outstanding—basic (in shares) |
94,081
|
83,875
|
94,021
|
80,030
|
| Basic earnings per common share (in dollars per share) |
$ (0.06)
|
$ (0.04)
|
$ 0.71
|
$ 0.56
|
| Earnings (loss) per common share—diluted |
|
|
|
|
| Interest on convertible debt |
$ 0
|
$ 0
|
$ 0
|
$ 5,329
|
| Net income (loss) including assumed conversions |
$ (5,866)
|
$ (3,617)
|
$ 66,629
|
$ 50,349
|
| Weighted-average common shares outstanding—basic (in shares) |
94,081
|
83,875
|
94,021
|
80,030
|
| Convertible notes weighted-average shares outstanding (in shares) |
0
|
0
|
0
|
13,217
|
| Options and restricted stock (in shares) |
0
|
0
|
1,666
|
1,367
|
| Weighted-average common shares outstanding—diluted (in shares) |
94,081
|
83,875
|
95,687
|
94,614
|
| Dilutive earnings (loss) per common share (in dollars per share) |
$ (0.06)
|
$ (0.04)
|
$ 0.70
|
$ 0.53
|