XML 36 R118.htm IDEA: XBRL DOCUMENT v2.4.1.9
Information Regarding the Consolidated CLO (Details 7) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2014
Jun. 27, 2012
CLO debt    
Principal amounts outstanding of CLO Debt   $ 500,000us-gaap_DebtInstrumentFaceAmount
Collateralized Debt Obligations [Member] | CIVs    
CLO debt    
Principal amounts outstanding of CLO Debt 92,114us-gaap_DebtInstrumentFaceAmount
/ dei_LegalEntityAxis
= lm_ConsolidatedInvestmentVehiclesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CollateralizedDebtObligationsMember
 
Excess unpaid principal over fair value (12,935)us-gaap_FairValueOptionAggregateDifferencesLongTermDebtInstruments
/ dei_LegalEntityAxis
= lm_ConsolidatedInvestmentVehiclesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CollateralizedDebtObligationsMember
 
Fair value 79,179us-gaap_LongTermDebtFairValue
/ dei_LegalEntityAxis
= lm_ConsolidatedInvestmentVehiclesMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_CollateralizedDebtObligationsMember
 
Other Nonoperating Income (Expense) [Member] | CIVs    
CLO debt    
Fair Value Option, Gain (Loss) recognized in other non-operating income of CIVs $ (5,914)us-gaap_FairValueOptionChangesInFairValueGainLoss1
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherNonoperatingIncomeExpenseMember
/ dei_LegalEntityAxis
= lm_ConsolidatedInvestmentVehiclesMember