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Accounts Receivable - Net and Revenue Recognition (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Apr. 02, 2017 | Jan. 01, 2017 | Apr. 02, 2017 | Mar. 27, 2016 | Oct. 02, 2016
Net accounts receivable and billings in excess of costs on uncompleted contracts |  |  |  |  |
Billed | $ 356,929 |  | $ 356,929 |  | $ 364,287
Unbilled | 353,737 |  | 353,737 |  | 356,147
Contract retentions | 35,233 |  | 35,233 |  | 29,135
Total accounts receivable - gross | 745,899 |  | 745,899 |  | 749,569
Allowance for doubtful accounts | (31,428) |  | (31,428) |  | (35,233)
Total accounts receivable - net | 714,471 |  | 714,471 |  | 714,336
Billings in excess of costs on uncompleted contracts | 114,341 |  | $ 114,341 |  | 88,223
Period for billing and collecting unbilled receivables |  |  | 12 months |  |
Period for earning majority of billings in excess of costs |  |  | 12 months |  |
Total accounts receivable related to claims, including requests for equitable adjustment on contracts | 48,000 |  | $ 48,000 |  | 45,000
Revenue Recognition and Contract Costs |  |  |  |  |
Net unfavorable operating income adjustments |  |  | 8,000 |  |
Liabilities for anticipated losses | 11,200 |  | 11,200 |  | 6,700
Estimated cost to complete the related contracts | 14,400 |  | 14,400 |  |
Accounts Receivable | U.S. federal government contracts |  |  |  |  |
Net accounts receivable and billings in excess of costs on uncompleted contracts |  |  |  |  |
Billed accounts receivable related to U.S. federal government contracts | 49,900 |  | 49,900 |  | 47,400
U.S. federal government unbilled receivables | 92,400 |  | 92,400 |  | $ 92,200
RME |  |  |  |  |
Revenue Recognition and Contract Costs |  |  |  |  |
Net unfavorable operating income adjustments |  |  | 2,300 |  |
RCM |  |  |  |  |
Net accounts receivable and billings in excess of costs on uncompleted contracts |  |  |  |  |
Reduction in the revenue related to the evaluation of the claims | 4,500 |  |  |  |
Cash proceeds from claim settlement |  |  |  | $ 13,400 |
Claims amount |  |  |  | 8,800 |
Gains (loss) from claim settlement | (3,200) | $ 0 |  | $ 4,600 |
Revenue Recognition and Contract Costs |  |  |  |  |
Net unfavorable operating income adjustments | $ 4,000 |  | $ 5,700 |  |

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