Basis of Presentation - Additional Information (Detail 3) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
	May 30, 2023	Aug. 12, 2022	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Jun. 24, 2022
Company And Summary Of Significant Accounting Policies [Line Items]
Payments to Noncontrolling Interests					$ 30,000
Interest Rate Cap [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Interest rate cap contracts, description				). The interest rate cap contracts provided protection of Compound SOFR up to 2% and covered 99% of the total nominal amount of the Inmarsat Term Loan Facility. At the time of the acquisition, the Company continued to account for the interest rate cap contracts as cash-flow hedges.
Gain (loss) in other comprehensive income arising from changes in the fair value of derivative contracts (designated as cash-flow hedging instruments)			$ 10,000	$ 10,600
Tax on gain (loss) arising from changes in the fair value of the interest rate cap contracts (designated as cash-flow hedging instruments)			(2,300)	2,900
Derivative contracts gain (loss) reclassified to other comprehensive income and interest expense, net (based on the nature of the underlying transaction)			16,900	1,800
Tax related to the reclassification of other comprehensive income and interest expense, net (based on the nature of the underlying transaction)			4,000
Cash received			14,000	31,800
Interest rate cap contracts			10,300	10,300
Interest Rate Cap [Member] | Other Current Assets [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Interest rate cap contracts			44,200	44,200
Interest Rate Cap [Member] | Other Noncurrent Assets [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Interest rate cap contracts			$ 4,700	$ 4,700
Inmarsat Term Loan Facility [Member] | Interest Rate Cap [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Interest rate cap	2.00%
Interest rate cap contracts percentage of protection of nominal amount	99.00%
2023 Term Loan Facility [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Credit Facility maximum borrowing capacity	$ 616,700
Bridge Facility [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Credit Facility maximum borrowing capacity	$ 733,400
Maximum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)			38 years	38 years
Financing lease, remaining lease term			3 years	3 years
Operating lease, remaining lease term			14 years	14 years
Estimated useful life, years			20 years	20 years
Maximum [Member] | Software Development Costs [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, years			5 years	5 years
Maximum [Member] | Software Development Member
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)			7 years	7 years
Minimum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)			2 years	2 years
Financing lease, remaining lease term			1 year	1 year
Operating lease, remaining lease term			1 year	1 year
Estimated useful life, years			2 years	2 years
Minimum [Member] | Software Development Member
Company And Summary Of Significant Accounting Policies [Line Items]
Property, equipment and satellites, estimated useful life (years)			3 years	3 years
TrellisWare [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Payments to Noncontrolling Interests		$ 30,000
Minority interest ownership percentage by parent						60.00%