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Revenue (Tables)

12 Months Ended

Mar. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

									Fiscal Year Ended March 31,
															2023									2022									2021
Cost-reimbursable																					$	4,908,451		53%						$	4,514,262		54%						$	4,419,533		56%
Time-and-materials																					2,296,965			25%						2,017,094			24%						1,962,999			25%
Fixed-price																					2,053,495			22%						1,832,344			22%						1,476,406			19%
Total Revenue																					$	9,258,911		100%						$	8,363,700		100%						$	7,858,938		100%

Revenue by Customer Type:

									Fiscal Year Ended March 31,
															2023									2022									2021
U.S. government(1):
Defense Clients																					$	4,210,430		45%						$	3,950,751		47%						$	3,920,498		49%
Intelligence Clients																					1,693,942			18%						1,578,939			19%						1,549,422			20%
Civil Clients																					3,124,889			34%						2,617,730			31%						2,183,184			28%
Total U.S. government																					9,029,261			97%						8,147,420			97%						7,653,104			97%
Global Commercial Clients																					229,650			3%						216,280			3%						205,834			3%
Total Revenue																					$	9,258,911		100%						$	8,363,700		100%						$	7,858,938		100%

(1) Certain contracts were reassigned between the various verticals of our U.S. government business shown in the table above to better align our operations to the customers we serve within each market. Comparative periods revenue by customer type has been recast to reflect the changes.

Revenue by Whether the Company Acts as a Prime Contractor or a Sub-Contractor:    

									Fiscal Year Ended March 31,
															2023									2022									2021
Prime Contractor																					$	8,755,628		95%						$	7,864,273		94%						$	7,311,313		93%
Sub-contractor																					503,283			5%						499,427			6%						547,625			7%
Total Revenue																					$	9,258,911		100%						$	8,363,700		100%						$	7,858,938		100%

Schedule of Contract Assets and Liabilities

The following table summarizes the contract assets and liabilities, and accounts receivable, net of allowance recognized on the Company’s consolidated balance sheets:

			March 31,
			2023						2022
Current assets:
Accounts receivable–billed			$	551,666					$	465,322
Accounts receivable–unbilled (contract assets)			1,223,482						1,157,667
Allowance for credit losses			(318)						—
Accounts receivable, net			1,774,830						1,622,989
Other long-term assets:
Accounts receivable–unbilled (contract assets)			59,455						64,339
Total accounts receivable, net			$	1,834,285					$	1,687,328
Other current liabilities
Advance payments, billings in excess of costs incurred and deferred revenue (contract liabilities)			$	18,995					$	26,747

X

- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045

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X

- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

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- References

No definition available.

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