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Shareholders' Equity - Narrative (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015 | Jun. 06, 2016 | Aug. 20, 2015
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Amount repurchased | $ 34,136,000 | $ 30,000,000 | $ 30,000,000 |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |  |  |
2017 Stock Repurchase Program |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Authorized repurchase amount |  |  |  | $ 150,000,000 |
Amount repurchased (in shares) | 655,470 |  |  |  |
Amount repurchased | $ 34,100,000 |  |  |  |
Average repurchase price (in dollars per share) | $ 52.08 |  |  |  |
2016 Stock Repurchase Program |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Authorized repurchase amount |  |  |  |  | $ 30,000,000.0
Amount repurchased (in shares) |  | 760,903 |  |  |
Amount repurchased |  | $ 30,000,000 |  |  |
Average repurchase price (in dollars per share) |  | $ 39.43 |  |  |
Preferred Share Purchase Right |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |
Number of shares of Series B Junior Participating Preferred Stock entitled to each right (in shares) | 0.01 |  |  |  |
Exercise price per one-hundredth of a Preferred Share (in dollars per share) | $ 125.00 |  |  |  |
Minimum percentage of common stock required for Rights exercisable | 20.00% |  |  |  |

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