Annual report pursuant to Section 13 and 15(d)

Notes Payable (Notes Payable) (Details)

v2.4.1.9
Notes Payable (Notes Payable) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 31, 2014
Nov. 15, 2014
Aug. 08, 2014
Debt Instrument [Line Items]            
Unamortized discount $ 1,093us-gaap_DebtInstrumentUnamortizedDiscount $ 1,618us-gaap_DebtInstrumentUnamortizedDiscount        
Interest paid 5,920us-gaap_InterestPaid 16,034us-gaap_InterestPaid 22,968us-gaap_InterestPaid      
Highland Capital Brokerage, Inc. (Highland)            
Debt Instrument [Line Items]            
Notes payable-current       21,834us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= lts_HighlandCapitalBrokerageInc.HighlandMember
   
Highland Capital Brokerage, Inc. (Highland) | 10% Promissory Notes due February 26, 2019            
Debt Instrument [Line Items]            
Interest rate, stated percentage       10.00%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_BusinessAcquisitionAxis
= lts_HighlandCapitalBrokerageInc.HighlandMember
/ us-gaap_DebtInstrumentAxis
= lts_TenPercentPromissoryNotesdueFebruary262019Member
   
Frequency of periodic payment       quarterly    
Highland Capital Brokerage, Inc. (Highland) | Promissory Notes | 10% Promissory Notes due February 26, 2019            
Debt Instrument [Line Items]            
Amount outstanding       6,737us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_BusinessAcquisitionAxis
= lts_HighlandCapitalBrokerageInc.HighlandMember
/ us-gaap_DebtInstrumentAxis
= lts_TenPercentPromissoryNotesdueFebruary262019Member
/ us-gaap_LongtermDebtTypeAxis
= lts_PromissoryNotesMember
   
KMS | Promissory Notes | One Point Eight Four Percent Promissory Notes [Member]            
Debt Instrument [Line Items]            
Interest rate, stated percentage         1.84%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_DebtInstrumentAxis
= lts_OnePointEightFourPercentPromissoryNotesMember
/ us-gaap_LongtermDebtTypeAxis
= lts_PromissoryNotesMember
1.84%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_DebtInstrumentAxis
= lts_OnePointEightFourPercentPromissoryNotesMember
/ us-gaap_LongtermDebtTypeAxis
= lts_PromissoryNotesMember
Frequency of periodic payment         quarterly  
Term         4 years 4 years
Debt instrument, face amount         8,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_DebtInstrumentAxis
= lts_OnePointEightFourPercentPromissoryNotesMember
/ us-gaap_LongtermDebtTypeAxis
= lts_PromissoryNotesMember
 
Unamortized discount         466us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_DebtInstrumentAxis
= lts_OnePointEightFourPercentPromissoryNotesMember
/ us-gaap_LongtermDebtTypeAxis
= lts_PromissoryNotesMember
 
Long-term debt         7,534us-gaap_LongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_DebtInstrumentAxis
= lts_OnePointEightFourPercentPromissoryNotesMember
/ us-gaap_LongtermDebtTypeAxis
= lts_PromissoryNotesMember
 
KMS | Subordinated Notes            
Debt Instrument [Line Items]            
Debt instrument, face amount         600us-gaap_DebtInstrumentFaceAmount
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
 
Interest paid $ 26us-gaap_InterestPaid
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
         
KMS | Subordinated Notes | Prime Rate [Member]            
Debt Instrument [Line Items]            
Interest rate at period end 3.25%us-gaap_DebtInstrumentInterestRateAtPeriodEnd
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember
         
Basis spread on variable rate         1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorSubordinatedNotesMember
/ us-gaap_VariableRateAxis
= us-gaap_PrimeRateMember