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Revenue Recognition - Cash Flow Statement Impact of Adoption of ASC 606 (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 29, 2019 | Sep. 30, 2018 | Oct. 01, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Net income | $ 158,761 | $ 136,957 | $ 117,917
Deferred income taxes | (37,615) | (29,360) | (9,957)
Accounts receivable and contract assets | (10,226) | (46,273) | (64,781)
Contract liabilities | (6,039) | 15,228 | 28,298
Net cash provided by operating activities | 208,513 | $ 185,733 | $ 141,487
Recognition Under Previous Guidance |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Net income | 157,535 |  |
Deferred income taxes | (38,116) |  |
Accounts receivable and contract assets | (17,434) |  |
Contract liabilities | 2,896 |  |
Net cash provided by operating activities | 208,513 |  |
Impact of the Adoption of ASC 606 | Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Net income | 1,226 |  |
Deferred income taxes | 501 |  |
Accounts receivable and contract assets | 7,208 |  |
Contract liabilities | (8,935) |  |
Net cash provided by operating activities | $ 0 |  |

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