XML 44 R61.htm IDEA: XBRL DOCUMENT v2.4.1.9
Reinsurance - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Effects of Reinsurance [Line Items]    
Deposit receivable $ 1,383,388us-gaap_DepositsAssets  
Modified coinsurance payable $ 1,383,388us-gaap_CededPremiumsPayable  
Allstate Life Insurance Company    
Effects of Reinsurance [Line Items]    
Reinsurance recoverable 65.00%us-gaap_ReinsuranceRecoverablesPercentageOfTotal
/ dei_LegalEntityAxis
= ck0000910739_AllstateLifeInsuranceCompanyMember		  
Non-affiliates | Rated A- or better    
Effects of Reinsurance [Line Items]    
Reinsurance recoverable 99.80%us-gaap_ReinsuranceRecoverablesPercentageOfTotal
/ us-gaap_InternalCreditAssessmentAxis
= ck0000910739_ReinsurersRatedAMinusOrHigherMember
/ dei_LegalEntityAxis
= ck0000910739_NonAffiliatesMember		  
Predecessor | Allstate Life Insurance Company    
Effects of Reinsurance [Line Items]    
Reinsurance recoverable   86.90%us-gaap_ReinsuranceRecoverablesPercentageOfTotal
/ dei_LegalEntityAxis
= ck0000910739_AllstateLifeInsuranceCompanyMember
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Predecessor | Non-affiliates    
Effects of Reinsurance [Line Items]    
Reinsurance recoverable   13.10%us-gaap_ReinsuranceRecoverablesPercentageOfTotal
/ dei_LegalEntityAxis
= ck0000910739_NonAffiliatesMember
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember
Predecessor | Non-affiliates | Rated A- or better    
Effects of Reinsurance [Line Items]    
Reinsurance recoverable   95.00%us-gaap_ReinsuranceRecoverablesPercentageOfTotal
/ us-gaap_InternalCreditAssessmentAxis
= ck0000910739_ReinsurersRatedAMinusOrHigherMember
/ dei_LegalEntityAxis
= ck0000910739_NonAffiliatesMember
/ us-gaap_StatementScenarioAxis
= us-gaap_PredecessorMember