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PENSION AND EMPLOYEE BENEFITS PLANS: (401k Plan) (Details) (Plan [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Nov. 30, 2014
Nov. 30, 2013
Nov. 30, 2012
Plan [Member]
     
Defined Contribution Plan Disclosure [Line Items]      
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 2,231us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
/ snx_DefinedContributionPlansAndOtherPostretirementBenefitPlansDisclosuresAxisAxis
= snx_DefinedContributionPlan401KPlanMember
$ 1,365us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
/ snx_DefinedContributionPlansAndOtherPostretirementBenefitPlansDisclosuresAxisAxis
= snx_DefinedContributionPlan401KPlanMember
$ 1,252us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
/ snx_DefinedContributionPlansAndOtherPostretirementBenefitPlansDisclosuresAxisAxis
= snx_DefinedContributionPlan401KPlanMember