Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details 2)

v2.4.1.9
Commitments and Contingencies (Details 2) (USD $)
3 Months Ended 0 Months Ended
Mar. 31, 2015
Apr. 24, 2015
Mar. 31, 2015
Mar. 05, 2015
Jul. 30, 2014
General Litigation          
Gain on legal settlement $ (60,505,000)us-gaap_GainLossRelatedToLitigationSettlement        
Skyhook | Patent infringement lawsuit          
General Litigation          
Number of claims       8us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_PatentInfringementLawsuitMember
 
Number of days before action is reopened       45 days  
Litigation settlement amount     90,000,000us-gaap_LitigationSettlementAmount
/ dei_LegalEntityAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_PatentInfringementLawsuitMember
   
Proceeds from Legal Settlements   90,000,000us-gaap_ProceedsFromLegalSettlements
/ dei_LegalEntityAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_PatentInfringementLawsuitMember
     
Accrued Professional Fees, Current 29,500,000us-gaap_AccruedProfessionalFeesCurrent
/ dei_LegalEntityAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_PatentInfringementLawsuitMember
  29,500,000us-gaap_AccruedProfessionalFeesCurrent
/ dei_LegalEntityAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_PatentInfringementLawsuitMember
   
Gain on legal settlement 60,500,000us-gaap_GainLossRelatedToLitigationSettlement
/ dei_LegalEntityAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_PatentInfringementLawsuitMember
       
TruePosition | Indemnification claim          
General Litigation          
Number of claims 6us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
  6us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
   
TruePosition | Antitrust lawsuit          
General Litigation          
Litigation settlement amount         6,000,000us-gaap_LitigationSettlementAmount
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_AntitrustLawsuitMember
T-Mobile | TruePosition | Indemnification claim          
General Litigation          
Number of claims 2us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_TMobileMember
  2us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_TMobileMember
   
AT&T | TruePosition | Indemnification claim          
General Litigation          
Number of claims 4us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_AtTMember
  4us-gaap_LossContingencyPendingClaimsNumber
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_AtTMember
   
Amount allocated     132,000us-gaap_LossContingencyDamagesSoughtValue
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_AtTMember
   
Maximum estimated allocation $ 132,000us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_AtTMember
  $ 132,000us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_AtTMember