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v3.19.1

Acquisitions and Divestitures - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2019 USD ($) | Jul. 01, 2018 USD ($) | Apr. 01, 2018 USD ($) employee | Dec. 31, 2017 USD ($) employee | Mar. 31, 2019 USD ($) | Apr. 01, 2018 USD ($)
Mergers and Acquisitions |  |  |  |  |  |
Issuance of promissory note for business acquisition |  |  |  |  | $ 24,688 | $ 0
Aggregate maximum of contingent consideration | $ 62,700 |  |  |  | 62,700 |
Contingent earn-out liability | 45,900 |  |  |  | $ 45,900 |
Change in contingent consideration |  | $ 1,900 |  |  |  |
Minimum |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Significant unobservable input, earn-out period |  |  |  |  | 2 years |
Minimum | Existing customer contracts |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 1 year |
Minimum | Trade names |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 3 years |
Maximum |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Significant unobservable input, earn-out period |  |  |  |  | 3 years |
Maximum | Existing customer contracts |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 10 years |
Maximum | Trade names |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Useful life of intangible assets |  |  |  |  | 5 years |
eGlobalTech |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Fair value of acquisition purchase price | 48,400 |  |  |  |  |
Issuance of promissory note for business acquisition | 24,700 |  |  |  |  |
Accruals | 2,600 |  |  |  | $ 2,600 |
Estimated fair value of contingent earn-out obligation | 21,100 |  |  |  | 21,100 |
Aggregate maximum of contingent consideration | $ 25,000 |  |  |  | $ 25,000 |
Contingent consideration achievement period | 3 years |  |  |  |  |
Glumac |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Fair value of acquisition purchase price |  |  |  | $ 38,400 |  |
Aggregate maximum of contingent consideration |  |  |  | $ 20,000 |  |
Contingent consideration achievement period |  |  |  | 3 years |  |
Number of employees acquired in acquisition | employee |  |  |  | 300 |  |
Cash paid to the former owners |  |  |  | $ 20,000 |  |
Contingent earn-out liability |  |  |  | $ 18,400 |  |
Norman Disney & Young |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Fair value of acquisition purchase price |  |  | $ 56,100 |  |  |
Aggregate maximum of contingent consideration |  |  | $ 20,200 |  |  | 20,200
Contingent consideration achievement period |  |  | 3 years |  |  |
Number of employees acquired in acquisition | employee |  |  | 700 |  |  |
Cash paid to the former owners |  |  | $ 46,900 |  |  |
Contingent earn-out liability |  |  | 7,600 |  |  | 7,600
Amount held in escrow |  |  | $ 1,600 |  |  | $ 1,600
Non-core field services business | Disposed of by sale |  |  |  |  |  |
Mergers and Acquisitions |  |  |  |  |  |
Proceeds from sale of divested business |  | 30,200 |  |  |  |
Revenue from wired and fiber optic communication and infrastructure projects |  | 70,000 |  |  |  |
Loss on disposition of business |  | $ 1,700 |  |  |  |

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