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Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015 | Apr. 01, 2017
Summary Of Significant Accounting Policies |  |  |  |
Fiscal Period Duration - Weeks | 1 year | 1 year | 1 year 7 days |
Percentage of sales accounted for using percentage of completion | 38.00% | 34.00% | 33.00% |
Percent of sales as units are delivered or services are performed | 62.00% | 66.00% | 67.00% |
Vesting period | 3 years |  |  |
Goodwill impairment charge | $ 0 | $ 4,800 | $ 0 |
Tangible Asset Impairment Charges | 1,378 |  |  |
Impairment charges of long-lived assets |  |  | 2,432 |
Debt Issuance Costs, Net | 3,468 | 5,457 |  |
Deferred Tax Assets, Net | $ 13,238 | 64,774 |  |
Accounting Standards Update 2015-03 |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Debt Issuance Costs, Net |  | 5,457 |  |
Accounting Standards Update 2015-07 |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Investments Measured at Net Asset Value per Share |  | 302,713 |  |
Accounting Standards Update 2015-17 |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Deferred Tax Assets, Net |  | 92,620 |  |
New Accounting Pronouncement, Early Adoption, Effect |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Restricted Cash and Cash Equivalents, Current |  |  |  | $ 37,366
Minimum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Standard Product Warranty Description | twelve |  |  |
Maximum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Standard Product Warranty Description | sixty |  |  |
Buildings and Improvements | Minimum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Estimated useful lives of property plant and equipment, years | 15 |  |  |
Buildings and Improvements | Maximum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Estimated useful lives of property plant and equipment, years | 40 |  |  |
Machinery And Equipment | Minimum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Estimated useful lives of property plant and equipment, years | 5 |  |  |
Machinery And Equipment | Maximum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Estimated useful lives of property plant and equipment, years | 15 |  |  |
Computer Equipment and Software | Minimum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Estimated useful lives of property plant and equipment, years | 3 |  |  |
Computer Equipment and Software | Maximum |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Estimated useful lives of property plant and equipment, years | 7 |  |  |
Other Restructuring |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Restructuring costs and asset impairment charges |  | $ 4,913 |  |
Other Restructuring | Finite-Lived Intangible Assets |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Restructuring costs and asset impairment charges |  |  | $ 472 |
Performance-based Restricted Stock Units (PSUs) |  |  |  |
Summary Of Significant Accounting Policies |  |  |  |
Vesting period | 3 years |  |  |

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