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Commitments and Contingencies (Lease Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract] |  |  |
Lease expense | $ 9,519 | $ 9,824 | $ 8,703

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- Definition Operating and Capital Leases, Rent Expense, Net + References No definition available. + Details
Name: | scsc_OperatingandCapitalLeasesRentExpenseNet
Namespace Prefix: | scsc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration