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Business Acquisitions, Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 28, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2016
Identifiable intangible assets with finite useful lives |  |  |  |
Gross Amount |  | $ 1,270,900 |  | $ 1,263,500
Accumulated Amortization |  | (860,600) |  | (784,100)
Intangible Assets, Net |  | 410,294 |  | 479,439
Amortization expense |  | 76,500 | $ 169,100 |
Estimated amortization expense of intangible assets for the remainder of fiscal 2017 and for the succeeding years |  |  |  |
2017 (three months remaining) |  | 24,000 |  |
2018 |  | 83,700 |  |
2019 |  | 78,400 |  |
2020 |  | 66,400 |  |
2021 |  | 56,400 |  |
Thereafter |  | 101,400 |  |
Intangible Assets, Net |  | 410,294 |  | 479,439
Acquisitions -additional disclosures |  |  |  |
Total consideration |  | 4,100 |  | 5,500
Shimmick Construction Company, Inc | Subsequent Event |  |  |  |
Acquisitions -additional disclosures |  |  |  |
Total consideration | $ 175,000 |  |  |
Backlog and customer relationships |  |  |  |
Identifiable intangible assets with finite useful lives |  |  |  |
Gross Amount |  | 1,254,500 |  | 1,247,100
Accumulated Amortization |  | (844,200) |  | (767,700)
Intangible Assets, Net |  | 410,300 |  | 479,400
Estimated amortization expense of intangible assets for the remainder of fiscal 2017 and for the succeeding years |  |  |  |
Intangible Assets, Net |  | $ 410,300 |  | 479,400
Backlog and customer relationships | Minimum |  |  |  |
Identifiable intangible assets with finite useful lives |  |  |  |
Amortization Period |  | 1 year |  |
Backlog and customer relationships | Maximum |  |  |  |
Identifiable intangible assets with finite useful lives |  |  |  |
Amortization Period |  | 11 years |  |
Trademark / tradename |  |  |  |
Identifiable intangible assets with finite useful lives |  |  |  |
Gross Amount |  | $ 16,400 |  | 16,400
Accumulated Amortization |  | $ (16,400) |  | $ (16,400)
Trademark / tradename | Minimum |  |  |  |
Identifiable intangible assets with finite useful lives |  |  |  |
Amortization Period |  | 3 months 18 days |  |
Trademark / tradename | Maximum |  |  |  |
Identifiable intangible assets with finite useful lives |  |  |  |
Amortization Period |  | 2 years |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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