Share-Based Compensation - Additional Information (Detail) |
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2016
Plans
shares
|
Jun. 30, 2015
shares
|
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Number of share-based compensation plans | Plans | 2 | |
| Restricted Stock [Member] | ||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Restricted stock and restricted stock units granted | 129,059 | 206,479 |
| Restricted Stock Units (RSUs) [Member] | ||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Restricted stock and restricted stock units granted | 247,656 | 145,552 |