Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets (Details)

v2.4.1.9
Goodwill and Other Intangible Assets (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Goodwill [Line Items]      
Balance at the beginning of the period   $ 20,669,000us-gaap_Goodwill  
Balance at the end of the period 27,166,000us-gaap_Goodwill 20,669,000us-gaap_Goodwill  
Accumulated goodwill impairment 18,400,000us-gaap_GoodwillImpairedAccumulatedImpairmentLoss    
TruePosition      
Goodwill [Line Items]      
Balance at the beginning of the period     20,669,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= lbrda_TruePositionIncMember
Balance at the end of the period 27,166,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= lbrda_TruePositionIncMember 		  20,669,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= lbrda_TruePositionIncMember
TruePosition | Skyhook      
Goodwill [Line Items]      
Balance at the beginning of the period 20,669,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= lbrda_TruePositionIncMember 		   
Acquired 24,931,000us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= lbrda_TruePositionIncMember 		   
Impairments $ (18,434,000)us-gaap_GoodwillImpairmentLoss
/ us-gaap_BusinessAcquisitionAxis
= lbrda_SkyhookWirelessIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= lbrda_TruePositionIncMember