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Goodwill and Intangible Assets Valuation Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 27, 2015 | Mar. 27, 2016
Goodwill | $ 601,379 | $ 716,244
RME |  |
Goodwill | 390,631 | 495,753
RME | WMG |  |
Fair value of business | 103,500 |
Carrying value of business | $ 93,900 |
Goodwill |  | $ 56,500
RME | WMG | US treasury bonds |  |
Impairment of goodwill |  |
Maturity of investments whose yield is considered in determination of impairment |  | 20 years
RME | WMG | Maximum |  |
Percentage of excess of fair value over carrying value | 20.00% |
Goodwill. | RME | WMG |  |
Discounted cash flow rate (as a percent) | 11.00% |
Revenue multiple | 1.0 |
Preceding period used for revenue multiple | 12 months |
Impairment of goodwill |  |
Maximum percentage of revenue growth that could indicate goodwill impairment |  | 2.00%
Minimum decline in future market prices of similar businesses that could indicate goodwill impairment |  | 10.00%
Minimum discounted cash flow rate (as a percent) |  | 14.00%
Goodwill. | RME | WMG | Minimum |  |
Annual revenue growth rate (as a percent) | 3.00% |
Goodwill. | RME | WMG | Maximum |  |
Annual revenue growth rate (as a percent) | 5.00% |
Income approach |  |
Weighted rate used in fair value of goodwill (as a percent) |  | 70.00%
Discounted cash flow and market approach |  |
Weighted rate used in fair value of goodwill (as a percent) |  | 30.00%

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