Quarterly report pursuant to Section 13 or 15(d)

STOCK INCENTIVE PLAN (Schedule of Stock Option Activity) (Details)

v2.4.1.9
STOCK INCENTIVE PLAN (Schedule of Stock Option Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Shares [Roll Forward]      
Beginning Balance 1,816,204us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber   2,030,459us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Granted 10,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod    
Exercised (73,115)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised    
Forfeited or expired (37,837)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod    
Ending Balance 1,715,252us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 1,816,204us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber 2,030,459us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Exercisable at end of period 962,327us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber    
Expected to Vest 714,905salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestNumber    
Weighted Average Exercise Price [Abstract]      
Beginning Balance $ 4.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice    
Granted $ 6.08us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice    
Exercised $ 2.39us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice    
Forfeited or expired $ 11.68us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice    
Ending Balance $ 4.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 4.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Exercisable at end of period $ 5.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice    
Expected to Vest $ 4.47salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedToVestWeightedAverageExercisePrice    
Weighted Average Grant Date Fair value [Abstract]      
Beginning Balance $ 3.39salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageGrantDateFairValue    
Granted $ 1.98us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue    
Exercised $ 1.42salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue    
Forfeited or expired $ 8.01salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageGrantDateFairValue    
Ending Balance $ 3.36salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageGrantDateFairValue $ 3.39salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageGrantDateFairValue  
Exercisable at end of period $ 3.63salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue    
Expected to Vest $ 3.01salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue    
Weighted Average Remaining Contractual Term [Abstract]      
Outstanding at beginning of period 4 years 9 months 18 days 4 years 9 months 18 days  
Outstanding at end of period 4 years 9 months 18 days 4 years 9 months 18 days  
Exercisable at end of period 3 years 8 months 12 days    
Expected to Vest 6 years 3 months 18 days    
Aggregate Intrinsic Value [Abstract]      
Beginning Balance $ 5,718us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue    
Ending Balance 3,102us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue 5,718us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue  
Exercisable at end of period 1,559us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1    
Expected to Vest $ 1,466salm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpectedTovestedAggregateIntrinsicValue