Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information (Unaudited) (Details)

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Quarterly Financial Information (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]                      
Revenue $ 3,941 $ 3,713 $ 3,747 $ 3,458 $ 3,576 $ 3,518 $ 3,371 $ 11,791 $ 14,859 $ 22,256 $ 13,092
Operating Income (Loss) (8,322) (7,588) (7,166) (6,201) (5,093) (4,096) (5,071) 2,246 (29,277) (12,014) (25,478)
Net earnings (loss) attributable to Liberty Broadband Corporation Series A, Series B and Series C stockholders $ 91,969 $ 27,496 $ 12,052 $ (14,301) $ 14,804 $ 59,639 $ 10,580 $ (15,070) $ 117,216 $ 69,953 $ 2,033,667
Basic earnings (loss) attributable to Series A, Series B and Series C Liberty Broadband shareholders per common share $ 0.51 $ 0.15 $ 0.07 $ (0.08) $ 0.08 $ 0.33 $ 0.06 $ (0.08) $ 0.65 $ 0.39 $ 11.19
Diluted net earnings (loss) attributable to Series A, Series B and Series C Liberty Broadband shareholders per common share $ 0.50 $ 0.15 $ 0.07 $ (0.08) $ 0.08 $ 0.33 $ 0.06 $ (0.08) $ 0.64 $ 0.38 $ 11.10