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Reportable Segments - Financial Information (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 30, 2018 USD ($) segment | Dec. 31, 2017 USD ($) | Sep. 30, 2018 USD ($)
Financial information regarding reportable segments |  |  |
Number of renamed reportable segments | segment | 2 |  |
Revenue | $ 717,431 | $ 759,749 |
Income from operations | 55,711 | 48,589 |
Total Assets | 1,834,889 |  | $ 1,959,421
GSG |  |  |
Financial information regarding reportable segments |  |  |
Revenue | 717,431 |  |
CIG |  |  |
Financial information regarding reportable segments |  |  |
Revenue | 759,749 |  |
Operating segment | GSG |  |  |
Financial information regarding reportable segments |  |  |
Revenue | 411,971 | 442,772 |
Income from operations | 37,413 | 39,125 |
Total Assets | 495,343 |  | 468,010
Operating segment | CIG |  |  |
Financial information regarding reportable segments |  |  |
Revenue | 317,793 | 331,513 |
Income from operations | 27,099 | 21,294 |
Total Assets | 441,829 |  | 478,197
Operating segment | RCM |  |  |
Financial information regarding reportable segments |  |  |
Revenue | 1,453 | 6,807 |
Income from operations | 4 | (1,158) |
Total Assets | 24,185 |  | 25,683
Elimination of inter-segment revenue |  |  |
Financial information regarding reportable segments |  |  |
Revenue | (13,786) | (21,343) |
Corporate |  |  |
Financial information regarding reportable segments |  |  |
Income from operations | (8,805) | $ (10,672) |
Total Assets | $ 873,532 |  | $ 987,531

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