XML 78 R94.htm IDEA: XBRL DOCUMENT v2.4.1.9
Stock-Based Compensation - Summary of the Activity for Nonvested Stock Option Awards (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Jan. 25, 2015
Jan. 26, 2014
Jan. 27, 2013
Jan. 29, 2012
Jan. 25, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]          
Options granted (in shares) 426us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 376us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross 258us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross    
Weighted Average Exercise Price (per share)          
Beginning balance (in dollars per share) $ 21.33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 18.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 16.94us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice    
Options granted (in dollars per share) $ 24.87us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice $ 30.62us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice $ 28.21us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice    
Options forfeited (in dollars per share) $ 26.69us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice $ 26.10us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice $ 25.30us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice    
Ending balance (in dollars per share) $ 23.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 21.33us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 18.29us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice    
Weighted Average Grant Date Fair Value (per share)          
Options granted (in dollars per share) $ 7.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 8.92us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 9.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue    
Unvested Stock Options Award          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]          
Beginning balance (in shares) 660us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
642us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
924us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options granted (in shares) 426us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
376us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
258us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options vested (in shares) (275)smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
(310)smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
(484)smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options forfeited (in shares) (35)us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
(48)us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
(56)us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Ending balance (in shares) 776us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
660us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
642us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
924us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
 
Weighted Average Exercise Price (per share)          
Beginning balance (in dollars per share) $ 28.39us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 23.66us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 18.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options granted (in dollars per share) $ 24.87us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 30.62us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 28.21us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options vested (in dollars per share) $ 27.03smtc_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 21.58smtc_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 16.42smtc_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options forfeited (in dollars per share) $ 26.32us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 26.16us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 21.69us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Ending balance (in dollars per share) $ 27.09us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 28.39us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 23.66us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 18.47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
 
Weighted Average Grant Date Fair Value (per share)          
Beginning balance (in dollars per share) $ 8.88us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 8.31us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 6.99us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
  $ 8.01us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
Options granted (in dollars per share) $ 7.18us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 8.92us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 9.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options vested (in dollars per share) $ 8.77us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 7.77us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 6.49us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options forfeited (in dollars per share) $ 8.02us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 8.53us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 7.74us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Weighted Average Remaining Expense Period (years)          
Ending Balance 2 years 5 months 2 years 3 months 1 year 10 months 24 days 1 year 10 months  
Total Fair Value          
Beginning balance $ 5,856smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 5,333smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 6,452smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options granted 3,058smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedOptionsGrantedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
3,355smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedOptionsGrantedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
2,457smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedOptionsGrantedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options vested 2,414us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
2,406us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
3,144us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Options forfeited 283smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonVestedOptionsForfeitedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
422smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonVestedOptionsForfeitedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
432smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsNonVestedOptionsForfeitedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
   
Ending balance $ 6,217smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 5,856smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 5,333smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember
$ 6,452smtc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsUnvestedTotalFairValue
/ us-gaap_AwardTypeAxis
= smtc_UnvestedStockOptionsAwardMember