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

Annual report pursuant to Section 13 and 15(d)

Business Combinations - Narrative (Details)

Business Combinations - Narrative (Details) $ in Thousands, ₩ in Millions, £ in Millions, $ in Millions													12 Months Ended
	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 ($) asset	Mar. 01, 2021 USD ($)	Aug. 21, 2020 USD ($)	Aug. 21, 2020 KRW (₩)	Feb. 28, 2020 USD ($)	Feb. 28, 2020 AUD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Oct. 06, 2021 USD ($)	Aug. 21, 2020 KRW (₩)	Feb. 28, 2020 AUD ($)
Business Acquisition [Line Items]
Cash consideration paid, net of cash acquired													$ 14,295	$ 1,798,915	$ 7,066
Number of intangible assets acquired \| asset							3
Estimated straight-line useful life (in years)													9 years 9 months 18 days
Payments of contingent consideration													$ 1,369	0	0
Goodwill													1,779,415	1,774,406	$ 593,129
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
Liabilities arising from contingencies							12,000
Indemnification assets							6,000						2,900
Liability for uncertainty in income taxes							12,300
Intangible assets							664,000						664,000
Goodwill							864,176						872,363
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%
Intangible assets								$ 105,000
Goodwill								$ 304,026
Attain \| Customer Relationships
Business Acquisition [Line Items]
Estimated straight-line useful life (in years)								10 years
Aidvantage
Business Acquisition [Line Items]
Contingent consideration													13,800			$ 18,500
Revenue contributed from acquired business													184,300
Gross profit contributed from acquired business													28,300
Payments of contingent consideration													1,400
Change in contingent consideration liability, interest													300
Aidvantage \| Selling, General and Administrative Expenses
Business Acquisition [Line Items]
Change in contingent consideration liability													$ 3,600
Aidvantage \| Maximum
Business Acquisition [Line Items]
Contingent consideration																65,000
Aidvantage \| Customer Relationships
Business Acquisition [Line Items]
Intangible assets, estimated useful life													27 months
Intangible assets																$ 16,700
Stirling Institute of Australia Pty Ltd
Business Acquisition [Line Items]
Percentage of voting equity interests acquired	100.00%
Intangible assets	$ 1,800
Revenue contributed from acquired business													$ 1,300
Gross profit contributed from acquired business													700
Cash payment to acquire business	4,100	$ 5.7
Goodwill	$ 2,300
BZ Bodies Limited
Business Acquisition [Line Items]
Percentage of voting equity interests acquired			100.00%
Intangible assets			$ 1,300
Revenue contributed from acquired business													3,900
Gross profit contributed from acquired business													$ 1,800
Cash payment to acquire business			2,500	£ 1.9
Goodwill			$ 1,400
Connect Assist
Business Acquisition [Line Items]
Percentage of voting equity interests acquired					100.00%
Intangible assets					$ 7,700
Cash payment to acquire business					20,800	£ 15.5
Goodwill					$ 11,100
Index Root
Business Acquisition [Line Items]
Percentage of voting equity interests acquired									100.00%								100.00%
Contingent consideration									$ 900								₩ 1,100
Intangible assets									1,400
Cash payment to acquire business									5,400	₩ 6,300
Goodwill									$ 5,100
Reversal of acquisition related costs														$ 1,000
InjuryNet
Business Acquisition [Line Items]
Percentage of voting equity interests acquired											100.00%							100.00%
Contingent consideration											$ 2,100							$ 3.1
Intangible assets											900
Cash payment to acquire business											4,400	$ 6.7
Goodwill											$ 2,600