Quarterly report pursuant to Section 13 or 15(d)

Notes Payable (Details)

v2.4.1.9
Notes Payable (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Note payable $ 62,627us-gaap_NotesPayable $ 56,034us-gaap_NotesPayable
Notes payable, unamortized discount 1,983us-gaap_DebtInstrumentUnamortizedDiscount 1,093us-gaap_DebtInstrumentUnamortizedDiscount
Notes payable to clearing firm under forgivable loan    
Debt Instrument [Line Items]    
Note payable 10,356us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupTwoMember
10,356us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupTwoMember
Note payable to a subsidiary of Premier Trust's former shareholder    
Debt Instrument [Line Items]    
Note payable 135us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupThreeMember
200us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupThreeMember
Notes payable to finance business acquisition    
Debt Instrument [Line Items]    
Note payable 17,650us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupFourMember
29,201us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupFourMember
Notes payable, unamortized discount 326us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= lts_GroupFourMember
627us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= lts_GroupFourMember
Note payable under term loan with bank    
Debt Instrument [Line Items]    
Note payable 1,288us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupFiveMember
1,406us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupFiveMember
Notes payable by subsidiary to certain former shareholders of Highland    
Debt Instrument [Line Items]    
Note payable 6,737us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupOneMember
6,737us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupOneMember
Notes payable to KMS' former shareholders    
Debt Instrument [Line Items]    
Note payable 7,082us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupSevenMember
7,534us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupSevenMember
Notes payable, unamortized discount 436us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= lts_GroupSevenMember
466us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= lts_GroupSevenMember
Notes payable to SSN's former shareholders    
Debt Instrument [Line Items]    
Note payable 18,779us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupEightMember
0us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= lts_GroupEightMember
Notes payable, unamortized discount 1,221us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= lts_GroupEightMember
 
Other    
Debt Instrument [Line Items]    
Note payable $ 600us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_OtherDebtSecuritiesMember
$ 600us-gaap_NotesPayable
/ us-gaap_DebtInstrumentAxis
= us-gaap_OtherDebtSecuritiesMember