| Schedule of Quarterly Financial Information | 
  
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1st  | 
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2nd  | 
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3rd  | 
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4th  | 
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Quarter  | 
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Quarter  | 
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Quarter  | 
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Quarter  | 
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amounts in thousands, except per share amounts  | 
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2019:   | 
      | 
  | 
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      | 
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      | 
  | 
      | 
  | 
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Revenue  | 
  | 
$  | 
 3,458  | 
   | 
 3,747  | 
   | 
 3,713  | 
  | 
 3,941  | 
  | 
 
Operating income (loss)  | 
  | 
$  | 
 (6,201)  | 
   | 
 (7,166)  | 
   | 
 (7,588)  | 
  | 
 (8,322)  | 
  | 
 
Net earnings (loss) attributable to Liberty Broadband Corporation Series A, Series B and Series C stockholders  | 
  | 
$  | 
 (14,301)  | 
   | 
 12,052  | 
   | 
 27,496  | 
  | 
 91,969  | 
  | 
 
Basic earnings (loss) attributable to Liberty Broadband Corporation Series A, Series B and Series C stockholders per common share  | 
  | 
$  | 
 (0.08)  | 
   | 
 0.07  | 
   | 
 0.15  | 
  | 
 0.51  | 
  | 
 
Diluted earnings (loss) attributable to Liberty Broadband Corporation Series A, Series B and Series C stockholders per common share  | 
  | 
$  | 
 (0.08)  | 
   | 
 0.07  | 
   | 
 0.15  | 
  | 
 0.50  | 
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1st  | 
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2nd  | 
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3rd  | 
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4th  | 
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  | 
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Quarter  | 
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Quarter  | 
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Quarter  | 
  | 
Quarter  | 
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  | 
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amounts in thousands, except per share amounts  | 
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2018:  | 
      | 
  | 
  | 
      | 
  | 
      | 
  | 
      | 
  | 
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Revenue  | 
  | 
$  | 
 11,791  | 
   | 
 3,371  | 
   | 
 3,518  | 
  | 
 3,576  | 
  | 
 
Operating income (loss)  | 
  | 
$  | 
 2,246  | 
   | 
 (5,071)  | 
   | 
 (4,096)  | 
  | 
 (5,093)  | 
  | 
 
Net earnings (loss) attributable to Liberty Broadband Corporation Series A, Series B and Series C stockholders  | 
  | 
$  | 
 (15,070)  | 
   | 
 10,580  | 
   | 
 59,639  | 
  | 
 14,804  | 
  | 
 
Basic earnings (loss) attributable to Liberty Broadband Corporation Series A, Series B and Series C stockholders per common share  | 
  | 
$  | 
 (0.08)  | 
   | 
 0.06  | 
   | 
 0.33  | 
  | 
 0.08  | 
  | 
 
Diluted earnings (loss) attributable to Liberty Broadband Corporation Series A, Series B and Series C stockholders per common share  | 
  | 
$  | 
 (0.08)  | 
   | 
 0.06  | 
   | 
 0.33  | 
  | 
 0.08  | 
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