Maximus, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Business Combinations and Divestitures - Narrative (Details)

Business Combinations and Divestitures - Narrative (Details) $ in Thousands, £ in Millions, $ in Millions										12 Months Ended
	Mar. 06, 2023 USD ($)	Jun. 01, 2022 USD ($)	Jun. 01, 2022 AUD ($)	Jan. 31, 2022 USD ($)	Jan. 31, 2022 GBP (£)	Sep. 14, 2021 USD ($)	Sep. 14, 2021 GBP (£)	May 28, 2021 USD ($) asset	Mar. 01, 2021 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Mar. 30, 2023 USD ($)	Oct. 06, 2021 USD ($)
Business Acquisition [Line Items]
Cash consideration paid, net of cash acquired										$ 0	$ 14,295	$ 1,798,915
Number of intangible assets acquired \| asset								3
Useful economic life										8 years 9 months 18 days
Payments of contingent consideration										$ 9,431	1,369	0
Goodwill										$ 1,779,215	$ 1,779,415	$ 1,774,406
Disposal Group Not Discontinued Operation Gain Loss On Disposal Statement Of Income Extensible List Not Disclosed Flag	pre-tax loss
SWEDEN
Business Acquisition [Line Items]
Total fair value of consideration													$ 400
UNITED KINGDOM
Business Acquisition [Line Items]
Pre-tax loss on sale of practice	$ 600
Customer contracts and relationships
Business Acquisition [Line Items]
Useful economic life										8 years 10 months 24 days
Technology-based intangible assets
Business Acquisition [Line Items]
Useful economic life										3 years
VES Group, Inc.
Business Acquisition [Line Items]
Percentage of voting equity interests acquired								100.00%
Cash consideration paid, net of cash acquired								$ 1,370,000
Estimated straight-line useful life (in years)								12 years
Liability for uncertainty in income taxes								$ 12,300
Indemnification assets										$ 800
Cash consideration, net of cash acquired										1,370,631
Intangible assets										664,000
Goodwill										872,363
VES Group, Inc. \| Technology-based intangible assets
Business Acquisition [Line Items]
Additional annual amortization expense following change in estimated useful life								3,800
VES Group, Inc. \| Indemnification Asset On Uncertain Tax Positions
Business Acquisition [Line Items]
Indemnification assets								$ 7,200
Attain
Business Acquisition [Line Items]
Percentage of voting equity interests acquired									100.00%
Cash consideration, net of cash acquired									$ 419,097
Intangible assets									105,000
Goodwill									$ 304,026
Attain \| Customer Relationships
Business Acquisition [Line Items]
Useful economic life									10 years
Aidvantage
Business Acquisition [Line Items]
Contingent consideration										7,500				$ 18,500
Payments of contingent consideration										$ 10,800
Aidvantage \| Maximum
Business Acquisition [Line Items]
Contingent consideration														65,000
Aidvantage \| Customer Relationships
Business Acquisition [Line Items]
Estimated straight-line useful life (in years)										27 months
Intangible assets														$ 16,700
Stirling Institute of Australia Pty Ltd
Business Acquisition [Line Items]
Percentage of voting equity interests acquired		100.00%
Cash consideration paid, net of cash acquired		$ 4,100	$ 5.7
Intangible assets		1,800
Goodwill		$ 2,300
BZ Bodies Limited
Business Acquisition [Line Items]
Percentage of voting equity interests acquired				100.00%
Cash consideration paid, net of cash acquired				$ 2,500	£ 1.9
Intangible assets				1,300
Goodwill				$ 1,400
Connect Assist
Business Acquisition [Line Items]
Percentage of voting equity interests acquired						100.00%
Cash consideration paid, net of cash acquired						$ 20,800	£ 15.5
Intangible assets						7,700
Goodwill						$ 11,100