Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Details 2)

v2.4.1.9
Commitments and Contingencies (Details 2) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
item
Sep. 10, 2010
item
Skyhook | Patent infringement lawsuit    
General Litigation    
Number of claims   8us-gaap_LossContingencyPendingClaimsNumber
/ 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 		 
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 		 
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 		 
Amount allocated $ 132us-gaap_LossContingencyDamagesSoughtValue
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_AtTMember 		 
Maximum estimated allocation $ 132us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_LitigationCaseAxis
= lbrda_IndemnificationClaimMember
/ us-gaap_MajorCustomersAxis
= lbrda_AtTMember