|
Fully Vested Stock Options and Stock Options Expected to Vest (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Dec. 31, 2014
|
|
| Number of Shares | ||
| Outstanding | 2,995 | 2,649 |
| Vested and expected to vest | 2,887 | |
| Exercisable | 1,659 | |
| Weighted Average Exercise Price | ||
| Outstanding | $ 33.53 | $ 32.33 |
| Vested and expected to vest | $ 33.28 | |
| Exercisable | $ 30.80 | |
| Weighted Average Remaining Contractual Term (In years) | ||
| Outstanding | 8 years 1 month 10 days | |
| Vested and expected to vest | 8 years 26 days | |
| Exercisable | 7 years 8 months 5 days | |
| Aggregate Intrinsic Values | ||
| Outstanding | $ 28,595 | |
| Vested and expected to vest | 28,242 | |
| Exercisable | $ 19,997 |