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Restructurings - Summary of Costs Related to Restructuring Actions (Detail) - USD ($) | 12 Months Ended
--- | ---
Sep. 27, 2019 | Sep. 28, 2018 | Sep. 29, 2017
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | $ 89,000 | $ 627,000 |
Restructuring cost | 19,543,000 | 6,265,000 | $ 2,744,000
Charges paid/settled | (17,105,000) | (6,803,000) |
Ending balance | 2,527,000 | 89,000 | 627,000
Long Beach, Belfast and Sydney Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 89,000 | 0 |
Restructuring cost | 0 | 6,265,000 |
Charges paid/settled | (89,000) | (6,176,000) |
Ending balance | 0 | 89,000 | 0
Ithaca Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 5,450,000 |  |
Charges paid/settled | (5,367,000) |  |
Ending balance | 83,000 | 0 |
Design Facility Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 2,528,000 |  |
Charges paid/settled | (2,077,000) |  |
Ending balance | 451,000 | 0 |
2019 Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 11,565,000 |  |
Charges paid/settled | (9,572,000) |  |
Ending balance | 1,993,000 | 0 |
Employee related costs |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 89,000 | 627,000 |
Restructuring cost | 8,084,000 | 2,789,000 | 2,744,000
Charges paid/settled | (6,624,000) | (3,327,000) |
Ending balance | 1,549,000 | 89,000 | 627,000
Employee related costs | Long Beach, Belfast and Sydney Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 89,000 | 0 |
Restructuring cost | 0 | 2,789,000 |
Charges paid/settled | (89,000) | (2,700,000) |
Ending balance | 0 | 89,000 | 0
Employee related costs | Ithaca Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 1,481,000 |  |
Charges paid/settled | (1,468,000) |  |
Ending balance | 13,000 | 0 |
Employee related costs | Design Facility Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 338,000 |  |
Charges paid/settled | (338,000) |  |
Ending balance | 0 | 0 |
Employee related costs | 2019 Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 6,265,000 |  |
Charges paid/settled | (4,729,000) |  |
Ending balance | 1,536,000 | 0 |
Facility related expenses |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 | 0 |
Restructuring cost | 11,459,000 | 3,476,000 | 0
Charges paid/settled | (10,481,000) | (3,476,000) |
Ending balance | 978,000 | 0 | 0
Facility related expenses | Long Beach, Belfast and Sydney Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 | 0 |
Restructuring cost | 0 | 3,476,000 |
Charges paid/settled | 0 | (3,476,000) |
Ending balance | 0 | 0 | $ 0
Facility related expenses | Ithaca Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 3,969,000 |  |
Charges paid/settled | (3,899,000) |  |
Ending balance | 70,000 | 0 |
Facility related expenses | Design Facility Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 2,190,000 |  |
Charges paid/settled | (1,739,000) |  |
Ending balance | 451,000 | 0 |
Facility related expenses | 2019 Restructuring Plan |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | 0 |  |
Restructuring cost | 5,300,000 |  |
Charges paid/settled | (4,843,000) |  |
Ending balance | $ 457,000 | $ 0 |

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