Liberty Broadband Corporation Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Business and Summary of Significant Accounting Principles (Narratives) (Details)

Business and Summary of Significant Accounting Principles (Narratives) (Details) (USD $)	3 Months Ended								12 Months Ended				0 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Jul. 01, 2012	Jan. 01, 2012	Jul. 23, 2013	Jul. 22, 2013	Nov. 01, 2013 station
Business
Year founded									1979
Acquisition
Goodwill	$ 229,560,000us-gaap_Goodwill				$ 219,041,000us-gaap_Goodwill				$ 229,560,000us-gaap_Goodwill	$ 219,041,000us-gaap_Goodwill	$ 77,294,000us-gaap_Goodwill
Common Stock
Authorized amount, repurchase of stock												200,000,000.0
Authorized amount per quarter, repurchase of stock												5,000,000.0
Stock repurchase program, remaining value authorized to be repurchased	122,200,000.0								122,200,000.0
Redeemable Preferred Stock
Preferred stock, shares authorized	1,000,000us-gaap_PreferredStockSharesAuthorized				1,000,000us-gaap_PreferredStockSharesAuthorized				1,000,000us-gaap_PreferredStockSharesAuthorized	1,000,000us-gaap_PreferredStockSharesAuthorized	1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding				0us-gaap_PreferredStockSharesOutstanding				0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Accounts Receivable and Allowance for Doubtful Receivables
Past due period									120 days
Intangible Assets
Finite-lived intangible asset, useful life									15 years 3 months 1 day
Asset Retirement Obligation
Additional capitalized costs	4,300,000				10,500,000				4,300,000	10,500,000
Revenue Recognition
Revenues	228,791,000us-gaap_SalesRevenueNet	240,725,000us-gaap_SalesRevenueNet	224,399,000us-gaap_SalesRevenueNet	216,283,000us-gaap_SalesRevenueNet	217,828,000us-gaap_SalesRevenueNet	217,943,000us-gaap_SalesRevenueNet	189,661,000us-gaap_SalesRevenueNet	186,216,000us-gaap_SalesRevenueNet	910,198,000us-gaap_SalesRevenueNet	811,648,000us-gaap_SalesRevenueNet	710,181,000us-gaap_SalesRevenueNet
Receivables	212,441,000us-gaap_AccountsReceivableGrossCurrent				228,372,000us-gaap_AccountsReceivableGrossCurrent				212,441,000us-gaap_AccountsReceivableGrossCurrent	228,372,000us-gaap_AccountsReceivableGrossCurrent
Advertising Expense
Advertising expense									5,700,000us-gaap_AdvertisingExpense	5,200,000us-gaap_AdvertisingExpense	4,900,000us-gaap_AdvertisingExpense
Interest Expense
Interest costs capitalized									3,600,000us-gaap_InterestCostsCapitalized	4,600,000us-gaap_InterestCostsCapitalized	2,800,000us-gaap_InterestCostsCapitalized
Guarantees
Guarantor obligations, value	56,000,000								56,000,000
Urban High Cost Support Program
Revenue Recognition
Percentage phase down, decrease in support payments									20.00%				20.00%
Percentage phase down, maximum decrease in support payments									60.00%
Remote High Cost Support Program
Revenue Recognition
Maximum cost per line, per month														250
Total High Cost Support Program
Revenue Recognition
Revenues									66,700,000	55,600,000	42,800,000
Receivables	47,000,000								47,000,000
Class A Common Stock
Common Stock
Stock repurchased during period, shares									400,000.0	1,800,000.0	1,500,000.0
Stock repurchased during period, value									4,200,000	15,600,000	14,000,000
ACS
Acquisition
Cash consideration paid															100,000,000	100,000,000
Total purchase price															365,511,000
Preferential cash distributions																190,000,000
Preference period																4 years
Preferential adjustment maximum																21,800,000
Goodwill															148,948,000	148,900,000
Additional revenue										50,600,000
Business Acquisition, Percentage of Voting Interests Acquired																33.30%
Business Acquisition, Percentage of Voting Interests Acquired from Noncontrolling Interest																66.60%
Denali Media Holdings
Acquisition
Total purchase price																	7,600,000
Denali Media Holdings
Number of broadcast stations acquired																	3
Selling, General and Administrative Expenses \| ACS
Acquisition
Transaction costs					$ 1,800,000					$ 1,800,000	$ 2,900,000
Other Intangible Assets
Intangible Assets
Finite-lived intangible asset, useful life									20 years
Minimum \| Other Intangible Assets
Intangible Assets
Finite-lived intangible asset, useful life									2 years
Maximum \| Other Intangible Assets
Intangible Assets
Finite-lived intangible asset, useful life									20 years