Basis of Presentation - Additional Information (Detail 2) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 07, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Mar. 31, 2024
Company And Summary Of Significant Accounting Policies [Line Items]
Increase (decrease) in unbilled accounts receivable				$ (18,500)
Insurance recovery proceeds				240,000
Capitalized costs related to software developed for resale		$ 758,000		758,000		$ 723,900
Capitalized cost related to software development for resale, additions		18,300	$ 25,100	56,100	$ 56,100
Amortization expense of capitalized software development costs		13,500	14,700	42,900	43,200
Capitalized Computer Software, Accumulated Amortization		504,200		504,200		483,300
Gross capitalized implementation costs incurred in cloud computing arrangements		78,900		78,900		63,600
Accumulated amortization related to capitalized implementation costs incurred in cloud computing arrangements		15,000		15,000		$ 9,500
Amortization of capitalized implementation costs incurred in cloud computing arrangements		$ 2,200	$ 2,200	$ 5,400	$ 2,200
Maximum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, years		20 years		20 years
Software Development Costs [Member] | Maximum [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Estimated useful life, years		5 years		5 years
Funded Research and Development from Customer Contracts [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Percentage of revenue		11.00%	10.00%	12.00%	12.00%
Fixed-price Contract [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Percentage of revenue		96.00%	96.00%	96.00%	95.00%
U.S. Government as an Individual Customer [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Percentage of revenue		20.00%	17.00%	18.00%	17.00%
Satellites [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Insurance recovery proceeds	$ 759,000	$ 42,500		$ 240,000
Satellites [Member] | Subsequent Event [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Insurance recovery proceeds	$ 10,000
Communication Services [Member] | Satellites [Member] | Selling General and Administrative Expenses [Member]
Company And Summary Of Significant Accounting Policies [Line Items]
Satellite impairment loss, net, including liabilities associated with the termination of certain subcontractor agreements			$ 905,500		$ 905,500