Annual report pursuant to Section 13 and 15(d)

Debt (Details 2)

v2.4.1.9
Debt (Details 2) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Dec. 25, 2013
Mar. 31, 2012
Debt        
Debt outstanding $ 372,000,000us-gaap_LongTermDebt      
Line of credit | TruePosition        
Debt        
Face amount of expired debt instrument     4,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember
 
Interest rate (as a percent) 0.40%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LineOfCreditMember
     
Letters of credit | TruePosition        
Debt        
Amount outstanding $ 634,000us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
$ 634,000us-gaap_LineOfCredit
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
   
Interest rate (as a percent)     1.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember
2.50%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ dei_LegalEntityAxis
= lbrda_TruePositionIncMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_LetterOfCreditMember