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Income Taxes - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015
Income tax expense | $ 9,761,000 | $ 10,967,000 | $ 11,963,000
Additions to valuation allowance | 14,900,000 |  | 17,500,000
Foreign earnings repatriated |  | 100,000,000 |
Net impact to fiscal 2017 opening retained earnings balance | 0 |  |
Increase to valuation allowance | 20,700,000 |  |
Aggregate undistributed earnings of foreign subsidiaries for which deferred income tax liability has not been recorded | 990,700,000 |  |
Uncertain tax benefits | 3,100,000 |  |
Unrecognized tax benefits that would reduce company's effective tax rate if recognized | 800,000 | 600,000 |
Total accrued penalties and net accrued interest with respect to income taxes | 200,000 | 200,000 | 200,000
Expense recognized for accrued penalties and net accrued interest (less than) | 100,000 | 100,000 | 100,000
Other liabilities (noncurrent) |  |  |
Uncertain tax benefits | 800,000 |  |
Deferred income taxes (noncurrent asset) |  |  |
Uncertain tax benefits | 2,300,000 |  |
State Jurisdiction |  |  |
Net operating loss carryforwards | 181,500,000 |  |
AMER |  |  |
Increase to valuation allowance | 18,400,000 |  |
EMEA |  |  |
Increase to valuation allowance | 2,300,000 |  |
APAC |  |  |
Tax reductions related to tax holiday | $ 37,500,000 | $ 27,100,000 | $ 29,900,000
Tax reductions related to tax holiday, basic (in dollars per share) | $ 1.11 | $ 0.81 | $ 0.89
Tax reductions related to tax holiday, diluted (in dollars per share) | $ 1.08 | $ 0.79 | $ 0.87
Accounting Standards Update 2016-09 |  |  |
Net operating loss carryforwards |  | $ 4,900,000 |
Increase to valuation allowance |  | 4,900,000 |
Accounting Standards Update 2016-09 | Retained Earnings |  |  |
Net impact to fiscal 2017 opening retained earnings balance |  | $ 0 |

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