XML 44 R32.htm IDEA: XBRL DOCUMENT
v3.25.2

Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 1,348,400 | $ 1,314,929 | $ 4,112,861 | $ 3,990,327
New York state government agencies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 148,408 | $ 159,927 | $ 466,053 | $ 487,413
New York state government agencies | Revenue Benchmark | Customer Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 11.00% | 12.20% | 11.30% | 12.20%
Other U.S. state government agencies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 291,312 | $ 310,374 | $ 869,561 | $ 952,978
Other U.S. state government agencies | Revenue Benchmark | Customer Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 21.60% | 23.60% | 21.10% | 23.90%
Total U.S. state government agencies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 439,720 | $ 470,301 | $ 1,335,614 | $ 1,440,391
U.S. federal government agencies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 743,058 | $ 666,895 | $ 2,267,078 | $ 2,015,780
U.S. federal government agencies | Revenue Benchmark | Customer Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 55.10% | 50.70% | 55.10% | 50.50%
International government agencies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 146,018 | $ 156,587 | $ 451,608 | $ 468,995
International government agencies | Revenue Benchmark | Customer Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 10.80% | 11.90% | 11.00% | 11.80%
Other, including local municipalities and commercial customers |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 19,604 | $ 21,146 | $ 58,561 | $ 65,161
Other, including local municipalities and commercial customers | Revenue Benchmark | Customer Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 1.50% | 1.60% | 1.40% | 1.60%
Performance-based |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 761,428 | $ 758,942 | $ 2,193,605 | $ 2,202,541
Performance-based | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 56.50% | 57.70% | 53.30% | 55.20%
Cost-plus |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 301,385 | $ 281,823 | $ 1,020,311 | $ 958,336
Cost-plus | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 22.40% | 21.40% | 24.80% | 24.00%
Fixed price |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 180,390 | $ 170,787 | $ 540,078 | $ 514,280
Fixed price | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 13.40% | 13.00% | 13.10% | 12.90%
Time and materials |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 105,197 | $ 103,377 | $ 358,867 | $ 315,170
Time and materials | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 7.80% | 7.90% | 8.70% | 7.90%
Program Operations |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 626,981 | $ 604,614 | $ 2,045,720 | $ 1,957,034
Program Operations | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 46.50% | 46.00% | 49.70% | 49.00%
Clinical Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 560,360 | $ 506,077 | $ 1,535,849 | $ 1,401,069
Clinical Services | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 41.60% | 38.50% | 37.30% | 35.10%
Employment & Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 81,906 | $ 112,044 | $ 274,513 | $ 346,404
Employment & Other | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 6.10% | 8.50% | 6.70% | 8.70%
Technology Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 79,153 | $ 92,194 | $ 256,779 | $ 285,820
Technology Solutions | Revenue Benchmark | Contract Concentration Risk |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue in % | 5.90% | 7.00% | 6.20% | 7.20%

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-18 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-18 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 20 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-20 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-18 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-18 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 275 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482861/275-10-50-18 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 91 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479777/606-10-55-91 + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-4 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 220 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org/1943274/2147476153/220-40-55-14 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 41 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-41 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-42 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-7 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 8: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 9: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 924 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479941/924-10-S99-1 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-5 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 30 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-40 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 22 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-4 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_MajorCustomersAxis=mms_NewYorkStateGovernmentAgenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mms_OtherUnitedStateGovernmentAgenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mms_TotalUnitedStatesStateGovernmentAgenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mms_UnitedStatesFederalGovernmentAgenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mms_InternationalGovernmentAgenciesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mms_OtherIncludingLocalMunicipalitiesAndCommercialCustomersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=mms_PerformanceBasedContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=mms_ContractConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=mms_CostPlusContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_FixedPriceContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerBasisOfPricingAxis=us-gaap_TimeAndMaterialsContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mms_ProgramOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mms_ClinicalServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mms_EmploymentAndOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=mms_TechnologySolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |