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Stockholders' Equity and Stock Compensation Plans (Tables) | 12 Months Ended
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Sep. 29, 2019
Stockholders' Equity Note [Abstract] |
Schedule of the stock-based compensation and related income tax benefits | The stock-based compensation and related income tax benefits were as follows:
| Fiscal Year Ended
| September 29, 2019 |  | September 30, 2018 |  | October 1, 2017
| (in thousands)
Total stock-based compensation | $ | 17,618 |  |  | $ | 19,582 |  |  | $ | 13,450 |
Income tax benefit related to stock-based compensation | (4,016 | ) |  | (5,288 | ) |  | (4,715 | )
Stock-based compensation, net of tax benefit | $ | 13,602 |  |  | $ | 14,294 |  |  | $ | 8,735 |
Schedule of stock option activity | Stock option activity for the fiscal year ended September 29, 2019 was as follows:
| Number of Options (in thousands) |  | Weighted- Average Exercise Price per Share |  | Weighted- Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value (in thousands)
Outstanding on September 30, 2018 | 1,355 |  |  | $ | 30.87 |  |  |  |  |  |
Exercised | (456 | ) |  | 26.21 |  |  |  |  |  |
Forfeited | (5 | ) |  | 23.48 |  |  |  |  |  |
Outstanding at September 29, 2019 | 894 |  |  | 33.28 |  |  | 5.08 |  | $ | 46,176 |
Vested or expected to vest at September 29, 2019 | 894 |  |  | 33.28 |  |  | 5.08 |  | 46,176 |
Exercisable on September 29, 2019 | 671 |  |  | 30.75 |  |  | 4.33 |  | 36,346 |
Schedule of assumptions used in the calculation of the fair value of stock options using the Black-Scholes option pricing model | The fair value of our stock options was estimated on the date of grant using the Black-Scholes option pricing model. There were no options granted in fiscal 2019. The following assumptions were used in the calculation for fiscal 2018 and 2017:
| Fiscal Year Ended
| September 30, 2018 |  | October 1, 2017
Dividend yield | 1.0% |  | 1.0%
Expected stock price volatility | 36.1% - 38.8% |  | 36.1% - 38.8%
Risk-free rate of return, annual | 1.7% - 2.9% |  | 1.7% - 1.9%
Schedule of RSU and PSU activity | A summary of the RSU and PSU activity under our stock plans is as follows:
| RSU |  | PSU
| Number of Shares (in thousands) |  | Weighted- Average Grant Date Fair Value per Share |  | Number of Shares (in thousands) |  | Weighted- Average Grant Date Fair Value per Share
Nonvested balance at October 2, 2016 | 499 |  |  | $ | 27.16 |  |  | 277 |  |  | $ | 31.65 |
Granted | 226 |  |  | 41.00 |  |  | 99 |  |  | 48.36 |
Vested | (186 | ) |  | 26.98 |  |  | — |  |  | — |
Forfeited | (28 | ) |  | 30.15 |  |  | — |  |  | — |
Nonvested balance at October 1, 2017 | 511 |  |  | 33.19 |  |  | 376 |  |  | 36.05 |
Granted | 199 |  |  | 48.16 |  |  | 99 |  |  | 57.40 |
Vested | (184 | ) |  | 31.85 |  |  | (270 | ) |  | 31.66 |
Adjustment (1) | — |  |  | — |  |  | 131 |  |  | 31.66 |
Forfeited | (38 | ) |  | 36.39 |  |  | (13 | ) |  | 41.80 |
Nonvested balance at September 30, 2018 | 488 |  |  | 39.56 |  |  | 323 |  |  | 44.27 |
Granted | 179 |  |  | 66.26 |  |  | 90 |  |  | 80.41 |
Vested | (180 | ) |  | 36.95 |  |  | (108 | ) |  | 31.63 |
Adjustment (1) | — |  |  | — |  |  | 79 |  |  | 31.63 |
Forfeited | (17 | ) |  | 48.56 |  |  | — |  |  | — |
Nonvested balance at September 29, 2019 | 470 |  |  | 50.42 |  |  | 384 |  |  | 53.67 |
(1) For fiscal 2018, includes a payout adjustment of 130,730 PSUs due to the actual performance level achieved for PSUs granted in fiscal 2015 that vested fiscal 2018. For fiscal 2019, includes a payout adjustment of 79,465 PSUs due to the actual performance level achieved for PSUs granted in fiscal 2016 that vested during fiscal 2019.
Summary of shares purchased, weighted-average purchase price, cash received, and the aggregate intrinsic value for shares purchased under the ESPP | The following table summarizes shares purchased, weighted-average purchase price, cash received and the aggregate intrinsic value for shares purchased under the ESPP:
| Fiscal Year Ended
| September 29, 2019 |  | September 30, 2018 |  | October 1, 2017
| (in thousands, except for purchase price)
Shares purchased | 148 |  |  | 141 |  |  | 190 |
Weighted-average purchase price | $ | 46.38 |  |  | $ | 40.38 |  |  | $ | 26.02 |
Cash received from exercise of purchase rights | $ | 6,844 |  |  | $ | 5,727 |  |  | $ | 4,940 |
Aggregate intrinsic value | $ | 277 |  |  | $ | 337 |  |  | $ | — |
Schedule of the assumptions used in the Black-Scholes option pricing model in estimating the grant date fair value of each award granted under the ESPP | The grant date fair value of each award granted under the ESPP was estimated using the Black-Scholes option pricing model with the following assumptions:
| Fiscal Year Ended
| September 29, 2019 |  | September 30, 2018 |  | October 1, 2017
Dividend yield | 1.0% |  | 1.0% |  | 1.0%
Expected stock price volatility | 26.7% |  | 24.0% |  | 22.4%
Risk-free rate of return, annual | 2.6% |  | 1.8% |  | 0.9%
Expected life (in years) | 1 |  | 1 |  | 1

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