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Restructuring Costs (Summary Of Restructuring Expense Accruals) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 03, 2015
Restructuring Cost and Reserve [Line Items]  
Accrual balance $ 200us-gaap_RestructuringReserve
Severance And Other Employee Costs [Member]  
Restructuring Cost and Reserve [Line Items]  
Accrual balance 270us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Accrual   
Expenditures (114)hckt_RestructuringExpenseAccrualAddition
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Accrual balance $ 156us-gaap_RestructuringReserve
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember