Annual report pursuant to Section 13 and 15(d)

Notes Payable (NFS Forgivable Loans) (Details)

v2.4.1.9
Notes Payable (NFS Forgivable Loans) (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 12 Months Ended
Nov. 04, 2011
installment
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2009
NFS Forgivable Loans          
Debt Instrument [Line Items]          
Term 7 years        
Loans payable $ 15,000us-gaap_LoansPayable
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
       
Effective percentage 6.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
       
Effective percentage, maximum 11.00%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
       
Number of installments 7lts_DebtInstrumentNumberofInstallments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
       
Frequency of periodic payment yearly        
Annual installment 2,143lts_AnnualInstallment
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
       
Forgiveness, principal   2,143lts_DebtInstrumentDecreaseForgivenessPrincipal
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
2,143lts_DebtInstrumentDecreaseForgivenessPrincipal
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
2,143lts_DebtInstrumentDecreaseForgivenessPrincipal
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
 
Forgiveness, interest   652lts_DebtInstrumentDecreaseForgivenessInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
787lts_DebtInstrumentDecreaseForgivenessInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
919lts_DebtInstrumentDecreaseForgivenessInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
 
Secured loan securities value   49,771lts_SecuredLoanSecuritiesValue
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NfsForgivableLoansMember
     
NFS Forgivable Loans, Amended          
Debt Instrument [Line Items]          
Loans payable 7,143us-gaap_LoansPayable
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
       
Effective percentage         2.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
Forgiveness, principal   1,786lts_DebtInstrumentDecreaseForgivenessPrincipal
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
1,786lts_DebtInstrumentDecreaseForgivenessPrincipal
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
1,786lts_DebtInstrumentDecreaseForgivenessPrincipal
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
 
Number of installments 4lts_NumberofInstallments
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
       
Forgiveness, interest   187lts_DebtInstrumentDecreaseForgivenessInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
280lts_DebtInstrumentDecreaseForgivenessInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
446lts_DebtInstrumentDecreaseForgivenessInterest
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_NFSForgivableLoansAmendedMember
 
Revolving Credit Facility          
Debt Instrument [Line Items]          
Amount outstanding   0us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
0us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
   
Revolving Credit Facility | Frost Gamma Investment Trust          
Debt Instrument [Line Items]          
Amount outstanding   $ 40,000us-gaap_LineOfCreditFacilityAmountOutstanding
/ us-gaap_CreditFacilityAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= lts_FrostGammaInvestmentTrustMember