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

Consolidated Statement of Cash Flows Supplemental Disclosures (Net cash paid or received) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Consolidated Statements of Cash Flows Supplemental Disclosures [Abstract]
Interest Paid, Net of Amounts Capitalized	$ 37,874	$ 42,654

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.