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Business Acquisitions, Goodwill and Intangible Assets - Acquisitions (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 17, 2014 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2016 USD ($) item
Business acquisition |  |  |  |
Number of acquisition | item |  |  |  | 1
Consideration paid in cash |  |  |  | $ 5,500
Acquisition and integration expenses |  |  |  |
Total |  | $ 15,412 | $ 41,038 |
Loss on disposal activities |  |  | (41,053) |
Trademark / tradename | Minimum |  |  |  |
Business acquisition |  |  |  |
Useful life |  | 3 months 18 days |  |
Trademark / tradename | Maximum |  |  |  |
Business acquisition |  |  |  |
Useful life |  | 2 years |  |
URS Corporation |  |  |  |
Business acquisition |  |  |  |
Consideration paid in cash | $ 2,300,000 |  |  |
Percentage of ownership acquired | 100.00% |  |  |
Consideration paid by issuing stock | $ 1,600,000 |  |  |
Senior notes assumed in acquisition as part of consideration net of repayments | 400,000 |  |  |
Repayment of acquiree term loan as part of consideration | 600,000 |  |  |
Repayment of acquiree line of credit as part of consideration | 100,000 |  |  |
Accrued expenses and other current liabilities | 240,000 |  |  |
Amortization of intangible assets of acquiree since acquisition date |  | $ 20,900 | 59,000 |
Fair value adjustment of joint ventures |  | 2,000 | 9,700 |
Fair value adjustment of noncontrolling interests |  | (2,100) | (5,700) |
Fair value of margin liability | 149,100 |  |  |
Billings in excess of costs on uncompleted contracts |  | $ 13,300 |  |
Years the majority liability will be recognized |  | 2 years |  |
Revenue and related income from operations |  | $ 1,600 | 15,100 |
Acquisition and integration expenses |  |  |  |
Severance and personnel costs |  | 11,500 | 6,600 |
Professional service, real estate-related, and other expenses |  | 3,900 | 34,400 |
Total |  | 15,400 | 41,000 |
Severance expense |  | 8,700 | 6,600 |
Severance expense paid |  | 0 | 4,300 |
Financing-related expenses |  | 2,800 | $ 4,100 |
URS Corporation | Non-core |  |  |  |
Acquisition and integration expenses |  |  |  |
Loss on disposal activities |  | (41,000) |  |
Net assets related to the loss on disposal activities |  | 99,600 |  |
Income from continuing operations of acquiree since acquisition date |  | $ (7,100) |  |
URS Corporation | Customer relationships, contracts and backlog |  |  |  |
Business acquisition |  |  |  |
Acquired backlog and customer relationship assets | $ 973,800 |  |  |
URS Corporation | Customer relationships, contracts and backlog | Minimum |  |  |  |
Business acquisition |  |  |  |
Useful life | 1 year |  |  |
URS Corporation | Customer relationships, contracts and backlog | Maximum |  |  |  |
Business acquisition |  |  |  |
Useful life | 11 years |  |  |
URS Corporation | Customer relationships, contracts and backlog | Weighted Average |  |  |  |
Business acquisition |  |  |  |
Useful life | 3 years |  |  |

X
- Definition This element represents acquisition-related costs for professional service, real estate-related, and other expenses incurred in connection with a business combination. + References No definition available. + Details
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- Definition This element represents acquisition-related costs for severance and personnel costs incurred in connection with a business combination. + References No definition available. + Details
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- Definition Amount of repayment of acquiree line of credit as part of consideration for the business combination. + References No definition available. + Details
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- Definition Amount of repayment of acquiree term loan as part of consideration for the business combination. + References No definition available. + Details
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- Definition This element represents the amount of amortization of intangible assets of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References No definition available. + Details
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- Definition Amount of billings in excess of costs on uncompleted contracts assumed at the acquisition date. + References No definition available. + Details
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- Definition Represents the margin fair value liability of acquisition. + References No definition available. + Details
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- Definition Represents the numbers of acquisitions. + References No definition available. + Details
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- Definition Represents the number of years the billings in excess of costs on uncompleted contracts majority liability will be recognized as revenue. + References No definition available. + Details
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- Definition Amount of obligations incurred and payable, pertaining to costs that are statutory in nature, incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include, but not limited to, taxes, interest, rent and utilities. Also includes the aggregate carrying amount of liabilities not separately disclosed. + References No definition available. + Details
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- Definition Amount classified as assets attributable to disposal group held for sale or disposed of. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51716988&loc=d3e1107-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=51717284&loc=SL51721673-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=51716988&loc=SL51721533-107759 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + Details
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- Definition Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2443-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2941-110230 + 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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- Definition Interest and debt related expenses associated with nonoperating financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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