Income (Loss) Per Common Share - Schedule of Potentially Dilutive Shares (Detail) - shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Number of shares excluded from the computation of diluted income (loss) per share | 720,955 | 696,610 | 680,650 |
| Restricted stock and restricted stock rights | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Number of shares excluded from the computation of diluted income (loss) per share | 665,955 | 511,492 | 499,371 |
| Stock options | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Number of shares excluded from the computation of diluted income (loss) per share | 55,000 | 185,118 | 181,279 |