Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Accounts receivable, net:
Accounts receivable, Billed	$ 545,081		$ 327,148
Accounts receivable, Unbilled	156,322		104,889
Allowance for doubtful accounts	(23,193)		(12,103)
Accounts receivable, net	678,210		419,934
Inventories:
Raw materials	89,778		68,655
Work in process	31,884		25,347
Finished goods	196,216		174,561
Inventories	317,878		268,563
Prepaid expenses and other current assets:
Insurance receivable	261,500
Prepaid expenses	185,892		115,701
Other	134,391		60,928
Prepaid expenses and other current assets	581,783		176,629
Property, equipment and satellites, net:
Property, equipment and satellites, gross	10,651,781		6,710,243
Less: accumulated depreciation and amortization	(3,094,575)		(2,331,960)
Property and equipment, net	7,557,206		4,378,283
Other assets:
Deferred income taxes	163,590		23,724
Capitalized software costs, net	240,597		222,155
Patents, orbital slots and other licenses, net	112,535		73,932
Other	217,225		146,227
Other assets	733,947		466,038
Accrued and other liabilities:
Collections in excess of revenues and deferred revenues	260,264		132,187
Accrued employee compensation	177,854		125,349
Accrued vacation	48,636		45,177
Operating lease liabilities	$ 71,561		$ 50,639
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued and other liabilities		Accrued and other liabilities
Interest payable	$ 127,098		$ 23,330
Income taxes payable	48,538		113,905
Other	216,670		156,645
Accrued and other liabilities	950,621		647,232
Other liabilities:
Deferred revenues, long-term portion	896,402		84,747
Deferred income taxes	1,228,270		85,989
Other	327,428		47,806
Other liabilities	2,452,100		218,542
Equipment and Software [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	2,992,325		1,917,243
CPE Leased Equipment [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	567,548		395,427
Furniture and Fixtures [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	65,433		58,807
Leasehold Improvements [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	209,162		151,827
Building [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	16,647		12,487
Land [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	20,787		3,873
Construction in Progress [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	1,301,376		685,646
Satellites [Member]
Prepaid expenses and other current assets:
Insurance receivable		$ 770,000
Property, equipment and satellites, net:
Property, equipment and satellites, gross	3,324,458		1,056,313
Satellite Ka-band Capacity Obtained under Finance Leases [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	177,576		175,712
Satellites under Construction [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	$ 1,976,469		$ 2,252,908