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v3.21.2

Acquisitions - Additional Information (Detail) € in Millions, shares in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 30, 2021 USD ($) shares | Mar. 31, 2017 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Apr. 30, 2021 EUR (€)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Net cash outlay after acquiree's cash on hand |  |  |  |  | $ 138,668,000 |  |
Shares issued in connection with acquisition of business |  |  |  |  | 207,169,000 |  |
Total revenues |  |  | $ 701,354,000 | $ 554,278,000 | $ 1,366,214,000 | $ 1,084,766,000 |
Euro Infrastructure Co [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Equity method investment ownership percentage |  | 49.00% |  |  |  |  |
Euro​ Infrastructure​ Co Step Acquisition [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Percentage of additional interest in subsidiary acquired | 51.00% |  |  |  |  |  | 51.00%
Ownership percentage after completing the acquisition | 100.00% |  |  |  |  |  | 100.00%
The consideration transferred | $ 327,400,000 | $ 160,400,000 |  |  |  |  |
Payments to acquire business | 167,000,000.0 |  |  |  |  |  |
Euro Infrastructure Co.’s cash on hand | 121,700,000 |  |  |  |  |  |
Net cash outlay after acquiree's cash on hand | $ 51,000,000.0 |  |  |  |  |  |
Contingent consideration arrangements | the Company may pay or receive up to €20.0 million, or approximately $23.4 million, in cash. |  |  |  | up to plus or minus €20.0 million |  |
Euro​ Infrastructure​ Co Step Acquisition [Member] | Maximum [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Amount of estimated purchase price consideration to be settled among the parties over the next 24 months from the closing date | $ 23,400,000 |  |  |  |  |  | € 20.0
RigNet, Inc [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
The consideration transferred | 317,900,000 |  |  |  |  |  |
Shares issued in connection with acquisition of business | $ 207,200,000 |  |  |  |  |  |
Shares issued in connection with acquisition of business, net of issuance costs, shares | shares | 4.0 |  |  |  |  |  |
Pay down of outstanding borrowings of acquiree | $ 107,300,000 |  |  |  |  |  |
Remaining amount payable |  |  | 0 |  | $ 0 |  |
Total revenues |  |  | 45,200,000 |  | 79,200,000 |  |
Net losses |  |  | 9,900,000 |  | 16,200,000 |  |
RigNet, Inc [Member] | Selling General and Administrative Expenses [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Merger-related transaction costs |  |  | $ 7,100,000 |  | $ 7,100,000 |  |
RigNet, Inc [Member] | Maximum [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Contingent consideration liability | $ 13,800,000 |  |  |  |  |  |

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