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Acquisition - Summary of Identifiable Intangible Assets Amortized on a Straight Line Basis (Details) - USD ($) $ in Thousands |  | 6 Months Ended
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Apr. 30, 2021 | Sep. 30, 2021
Euro​ Infrastructure​ Co Step Acquisition [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 26,574 |
Estimated weighted average useful life | 8 years |
RigNet, Inc [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 221,540 |
Estimated weighted average useful life | 10 years |
Customer Relationships [Member] | Euro​ Infrastructure​ Co Step Acquisition [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 17,877 |
Estimated weighted average useful life | 8 years |
Customer Relationships [Member] | RigNet, Inc [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 101,920 |
Estimated weighted average useful life | 12 years |
Other [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Estimated weighted average useful life |  | 9 years
Other [Member] | Euro​ Infrastructure​ Co Step Acquisition [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 7,851 |
Estimated weighted average useful life | 7 years |
Other [Member] | RigNet, Inc [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 8,640 |
Estimated weighted average useful life | 12 years |
Trade Name [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Estimated weighted average useful life |  | 7 years
Trade Name [Member] | Euro​ Infrastructure​ Co Step Acquisition [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 846 |
Estimated weighted average useful life | 2 years |
Trade Name [Member] | RigNet, Inc [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 25,540 |
Estimated weighted average useful life | 8 years |
Technology [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Estimated weighted average useful life |  | 7 years
Technology [Member] | RigNet, Inc [Member] |  |
Acquired Finite Lived Intangible Assets [Line Items] |  |
Preliminary fair value | $ 85,440 |
Estimated weighted average useful life | 8 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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