Quarterly report pursuant to Section 13 or 15(d)

Lease Obligations (Lease Obligations) (Details)

v2.4.1.9
Lease Obligations (Lease Obligations) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Operating Leased Assets [Line Items]  
Operating lease obligations, Less than 1 year $ 4,107us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths
Operating lease obligations, 1 year 1,847us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo
Operating lease obligations, 2 years 764us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree
Operating lease obligations, Year 3 742us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour
Operating lease obligations, 4 years 187us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive
Total 7,647us-gaap_OperatingLeasesFutureMinimumPaymentsDue
Payments expected to received from sublease agreements  
Sublease payments expected to be received, Less than 1 year 3,151lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextRollingTwelveMonths
Sublease payments expected to be received, 1 year 1,315lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearTwo
Sublease payments expected to be received, 2 years 309lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearThree
Sublease payments expected to be received, 3 years 277lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearFour
Sublease payments expected to be received, 4 years 71lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearFive
Total 5,123us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals
Corporate Headquarters - San Diego, CA  
Operating Leased Assets [Line Items]  
Operating lease obligations, Less than 1 year 686us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Operating lease obligations, 1 year 704us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Operating lease obligations, 2 years 723us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Operating lease obligations, Year 3 742us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFour
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Operating lease obligations, 4 years 187us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearFive
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Total 3,042us-gaap_OperatingLeasesFutureMinimumPaymentsDue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Payments expected to received from sublease agreements  
Sublease payments expected to be received, Less than 1 year 433lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextRollingTwelveMonths
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Sublease payments expected to be received, 1 year 444lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearTwo
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Sublease payments expected to be received, 2 years 455lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearThree
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Sublease payments expected to be received, 3 years 465lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearFour
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Sublease payments expected to be received, 4 years 116lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearFive
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Total 1,913us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_CorporateHeadquartersSanDiegoCAMember
Bioscience and Technology Business Center - Lawrence, KS  
Operating Leased Assets [Line Items]  
Operating lease obligations, Less than 1 year 54us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_BioscienceandTechnologyBusinessCenterLawrenceKSMember
Operating lease obligations, 1 year 54us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_BioscienceandTechnologyBusinessCenterLawrenceKSMember
Operating lease obligations, 2 years 41us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearThree
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_BioscienceandTechnologyBusinessCenterLawrenceKSMember
Total 149us-gaap_OperatingLeasesFutureMinimumPaymentsDue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_BioscienceandTechnologyBusinessCenterLawrenceKSMember
Vacated Office and Research Facility - San Diego, CA  
Operating Leased Assets [Line Items]  
Operating lease obligations, Less than 1 year 765us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeandResearchFacilitySanDiegoCAMember
Total 765us-gaap_OperatingLeasesFutureMinimumPaymentsDue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeandResearchFacilitySanDiegoCAMember
Vacated Office Office and Research Facility - Cranbury, NJ  
Operating Leased Assets [Line Items]  
Operating lease obligations, Less than 1 year 2,602us-gaap_OperatingLeasesFutureMinimumPaymentsNextRollingTwelveMonths
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeOfficeandResearchFacilityCranburyNJMember
Operating lease obligations, 1 year 1,089us-gaap_OperatingLeasesFutureMinimumPaymentsDueInRollingYearTwo
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeOfficeandResearchFacilityCranburyNJMember
Total 3,691us-gaap_OperatingLeasesFutureMinimumPaymentsDue
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeOfficeandResearchFacilityCranburyNJMember
Payments expected to received from sublease agreements  
Sublease payments expected to be received, Less than 1 year 212lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextRollingTwelveMonths
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeOfficeandResearchFacilityCranburyNJMember
Sublease payments expected to be received, 1 year 88lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsDueinRollingYearTwo
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeOfficeandResearchFacilityCranburyNJMember
Total 300us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_VacatedOfficeOfficeandResearchFacilityCranburyNJMember
Office and Research Facility - San Diego, CA  
Payments expected to received from sublease agreements  
Sublease payments expected to be received, Less than 1 year 311lgnd_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextRollingTwelveMonths
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_OfficeAndResearchFacilitySanDiegoMember
Total $ 311us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= lgnd_OfficeAndResearchFacilitySanDiegoMember