Stock-based Compensation (Tables)
|
6 Months Ended |
Mar. 31, 2018 |
|---|
| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
|
| Fair Values of Options, Black-Scholes Option-Pricing Model, Weighted-Average Assumptions |
The fair values of the options granted during the six months ended March 31, 2018 were estimated on the dates of grants using the Black-Scholes option-pricing model with the following weighted-average assumptions:
|
Risk-free interest rate |
|
2.10 |
% |
|
Expected volatility |
|
26.43 |
% |
|
Expected life (in years) |
|
5.46 |
|
|
Dividend yield |
- |
|
|
| Stock Options Outstanding and Activity During the Period |
The following table summarizes all stock option activity for the six months ended March 31, 2018 (in thousands, except share, per share, and time period amounts):
|
|
Options
Outstanding |
|
|
Weighted-
Average
Exercise
Price |
|
|
Weighted-
Average
Remaining
Contractual
Term (Years) |
|
|
Aggregate
Intrinsic
Value1 |
|
|
Balance as of September 30, 2017 |
|
2,084,228 |
|
|
$ |
28.84 |
|
|
|
6.1 |
|
|
$ |
46,714 |
|
|
Granted |
|
276,370 |
|
|
|
55.17 |
|
|
|
|
|
|
|
|
|
|
Exercised |
|
(217,397 |
) |
|
|
24.46 |
|
|
|
|
|
|
|
|
|
|
Canceled/Forfeited |
|
(47,842 |
) |
|
|
41.82 |
|
|
|
|
|
|
|
|
|
|
Expired |
|
(1,991 |
) |
|
|
15.28 |
|
|
|
|
|
|
|
|
|
|
Balance as of March 31, 2018 |
|
2,093,368 |
|
|
$ |
32.48 |
|
|
|
6.2 |
|
|
$ |
43,646 |
|
|
Vested and expected to vest after March 31, 2018 |
|
2,071,674 |
|
|
$ |
32.32 |
|
|
|
6.1 |
|
|
$ |
43,510 |
|
|
Exercisable as of March 31, 2018 |
|
1,512,437 |
|
|
$ |
27.48 |
|
|
|
5.2 |
|
|
$ |
38,704 |
|
________________________________
|
|
1 |
Aggregate intrinsic value as represents the difference between the closing fair value of the underlying common stock and the exercise price of outstanding, in-the-money options on the date of measurement. |
|
| Stock Option Grants, Vesting, and Exercises |
The following table summarizes additional information on stock options for the periods presented (in thousands, except per share amounts):
|
|
Six Months Ended March 31, |
|
|
|
2018 |
|
|
2017 |
|
|
Weighted-average fair value of stock options granted |
$ |
15.86 |
|
|
$ |
14.21 |
|
|
Total fair value of stock options vested |
|
3,832 |
|
|
|
4,977 |
|
|
Total intrinsic value of stock options exercised |
|
7,700 |
|
|
|
7,906 |
|
|
| Restricted Shares and Units Outstanding and Activity During the Period |
The following table summarizes all restricted stock unit activity for the six months ended March 31, 2018:
|
|
RSUs
Outstanding |
|
|
Weighted-
Average
Grant Date
Fair Value |
|
|
Balance at September 30, 2017 |
|
770,973 |
|
|
$ |
38.95 |
|
|
Granted |
|
370,190 |
|
|
|
57.40 |
|
|
Performance awards1 |
|
41,440 |
|
|
|
39.56 |
|
|
Released |
|
(189,154 |
) |
|
|
31.63 |
|
|
Canceled/Forfeited |
|
(35,974 |
) |
|
|
47.65 |
|
|
Balance at March 31, 2018 |
|
957,475 |
|
|
$ |
47.23 |
|
|
Vested and expected to vest after March 31, 2018 |
|
936,924 |
|
|
$ |
47.10 |
|
_________________________________
|
|
1 |
Additional restricted stock units outstanding as a result of the satisfaction of a performance vesting condition prior to the ascribed time-based vesting condition (release date). |
|
| Schedule Of Restricted Stock Units Additional Information |
The following table summarizes additional information on RSUs for the periods presented (in thousands, except per share amounts):
|
|
Six Months Ended March 31, |
|
|
|
2018 |
|
|
2017 |
|
|
Weighted-average fair value of RSUs granted |
$ |
57.40 |
|
|
$ |
47.27 |
|
|
Total fair value of RSUs vested |
|
6,523 |
|
|
|
2,736 |
|
|
Total intrinsic value of RSUs released |
|
10,924 |
|
|
|
3,074 |
|
|