Annual report pursuant to Section 13 and 15(d)

Acquisitions (Purchase Price Allocation) (Details)

v2.4.1.9
Acquisitions (Purchase Price Allocation) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Oct. 15, 2014
Jul. 31, 2014
Business Acquisition [Line Items]          
Goodwill $ 115,238us-gaap_Goodwill $ 90,501us-gaap_Goodwill $ 90,578us-gaap_Goodwill    
KMS          
Business Acquisition [Line Items]          
Cash       6,708us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Securities owned, at fair value       599lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedSecuritiesOwnedFairValue
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Receivables       1,462us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Other receivables, net       2,101lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherReceivables
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Fixed assets, net       192us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Restricted assets       150lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedRestrictedAssets
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Identifiable intangible assets       10,859us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Goodwill       13,269us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Other assets       4,504us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Total assets acquired       39,844us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Accrued compensation       (826)lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccruedCompensation
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Commissions and fees payable       (2,772)lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesCommissionsandFeesPayable
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Notes payable-long term       (600)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Accounts payable and accrued liabilities       (6,516)lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccountsPayableandAccrueLiabilities
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Deferred compensation liability       (587)lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedDeferredCompensationLiability
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Deferred taxes payable, net       (3,983)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Total liabilities assumed       (15,284)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
Total estimated purchase price       24,560us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= lts_KMSFinancialServicesInc.KMSMember
 
HCHC Holdings, Inc.          
Business Acquisition [Line Items]          
Cash         260us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Receivables         6,070us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Identifiable intangible assets         45,587us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Goodwill         11,515us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Other assets         2,450us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Total assets acquired         65,882us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Commissions and fees payable         (1,450)lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentLiabilitiesCommissionsandFeesPayable
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Notes payable-current         (21,834)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Notes payable-long term         (7,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Accounts payable and accrued liabilities         (6,777)lts_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccountsPayableandAccrueLiabilities
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Deferred taxes payable, net         (17,255)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Total liabilities assumed         (54,316)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member
Total estimated purchase price         $ 11,566us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= lts_HCHCHoldingsInc.Member