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NET INCOME PER SHARE (Details 2) (Stock options and stock appreciation rights)
In Millions, unless otherwise specified
3 Months Ended
Apr. 04, 2015
Mar. 29, 2014
Stock options and stock appreciation rights
   
Net income per share    
Antidilutive securities excluded from computation of earnings per share, amount 0.6us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= newp_StockOptionsAndStockSettledStockAppreciationRightsSARSMember
0.1us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= newp_StockOptionsAndStockSettledStockAppreciationRightsSARSMember