Liberty Broadband Corporation Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Business and Summary of Significant Accounting Principles (Policies)
Notes Tables
Notes Details

Stockholders' Equity (Narratives) (Details)

v3.5.0.2

Stockholders' Equity (Narratives) (Details) - USD ($)	3 Months Ended		6 Months Ended
Stockholders' Equity (Narratives) (Details) - USD ($)	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Common Stock [Abstract]
Stock Repurchased and Retired During Period, Value			$ 20,532,000	$ 36,939,000
Restricted Stock [Member]
Share-based Compensation [Abstract]
Unrecognized share-based compensation expense	$ 13,800,000		$ 13,800,000
Weighted average period for recognition of unvested shares			1 year 7 months 6 days
Common Stock - Class A [Member]
Common Stock [Abstract]
Stock Repurchased and Retired During Period, Value			$ 196,000	$ 18,808,000
Share-based Compensation [Abstract]
Number of shares authorized	15,700,000.0		15,700,000.0
Maximum [Member] \| Restricted Stock [Member]
Share-based Compensation [Abstract]
Vesting period			3 years
Stock Option Plan Member [Member] \| Restricted Stock [Member]
Share-based Compensation [Abstract]
Granted (USD per share)			$ 17.68	$ 14.70
Fair value of awards vesting during period			$ 4,300,000	$ 4,900,000
Stock Option Plan Member [Member] \| Common Stock - Class A [Member]
Share-based Compensation [Abstract]
Number of shares available for grant	1,600,000		1,600,000
Stock Buyback Program [Member]
Common Stock [Abstract]
Amount authorized per quarter by Board for share repurchases	$ 5,000,000
Stock Repurchased and Retired During Period, Shares	500,000	1,200,000	1,100,000	2,300,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 86,000,000.00		$ 86,000,000.00
Stock Buyback Program [Member] \| Common Stock - Class A [Member]
Common Stock [Abstract]
Stock Repurchased and Retired During Period, Value	$ 8,300,000	$ 19,700,000	19,500,000	$ 35,900,000
Other Nonoperating Income (Expense) [Member]
Share-based Compensation [Abstract]
Share-based compensation expense			$ 5,000,000	$ 5,300,000

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Amount Authorized Per Quarter By Board For Share Repurchases

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Common Stock [Abstract]

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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