|
Earnings per Share - Additional Information (Detail)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Earnings Per Share [Abstract] | ||
| Anti-dilutive shares excluded from computation of earnings per share, amount | 0.8 | 0.3 |