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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Accumulated other comprehensive income) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Oct. 01, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Gain/(Loss) from foreign currency translation adjustments $ 2,422 $ 462
Unrecognized actuarial loss, Switzerland pension plan, net of tax (1,736) (2,726)
Accumulated other comprehensive income 2,039 (2,726)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax $ 1,353 $ (462)