Quarterly report pursuant to Section 13 or 15(d)

Business combinations (Details)

v2.4.1.9
Business combinations (Details)
6 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended
Mar. 31, 2014
USD ($)
Mar. 31, 2015
USD ($)
Sep. 30, 2014
USD ($)
Apr. 01, 2015
Acentia LLC
Subsequent events
USD ($)
Apr. 01, 2015
Acentia LLC
Subsequent events
USD ($)
Apr. 01, 2015
Acentia LLC
Customer relationships
Subsequent events
Apr. 01, 2015
Acentia LLC
Customer relationships
Subsequent events
USD ($)
Apr. 07, 2015
Remploy
Subsequent events
USD ($)
Apr. 07, 2015
Remploy
Subsequent events
GBP (£)
Apr. 07, 2015
Remploy
Subsequent events
GBP (£)
Business combinations                    
Share capital acquired (as a percent)         100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
        70.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= mms_RemployLimitedMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Share capital held in trust for the benefit of employees (as a percent)                   30.00%mms_BusinessAcquisitionPercentageOfVotingInterestsHeldInTrustForBenefitOfEmployees
/ us-gaap_BusinessAcquisitionAxis
= mms_RemployLimitedMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Preliminary Purchase Price Accounting                    
Cash consideration, net of cash acquired $ 2,670,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired     $ 294,005,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
           
Percentage of goodwill anticipated to be deductible for tax purpose       70.00%mms_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductiblePercentage
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
           
Acquisition consideration               3,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mms_RemployLimitedMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
2,000,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= mms_RemployLimitedMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Net assets                   0mms_BusinessCombinationNetAssetsOnAcquireeBalanceSheetOnDateOfAcquisition
/ us-gaap_BusinessAcquisitionAxis
= mms_RemployLimitedMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Billed and unbilled receivables         35,087,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Other assets         3,635,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Property and equipment         1,619,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Intangible assets             69,900,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Total identifiable assets acquired         110,241,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Accounts payable and other liabilities         30,676,000mms_BusinessAcquisitionPurchasePriceAllocationCurrentLiabilitiesAccountsPayableAndOtherLiabilities
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Deferred revenue         251,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Total liabilities assumed         30,927,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Net identifiable assets acquired         79,314,000mms_BusinessCombinationRecognizedIdentifiableAssetsExcludingGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Goodwill   162,214,000us-gaap_Goodwill 170,626,000us-gaap_Goodwill   214,691,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Net assets acquired         $ 294,005,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= mms_AcentiaLlcMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
         
Amortization period of intangible assets           14 years