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Other Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Other liabilities    
Employee compensation and benefits $ 36,961 $ 34,020
Deferred FCC repack income 46,210 44,945
Programming liability 293,629 33,481
Liability for pension benefits 132,040 161,845
Liabilities for uncertain tax positions 11,605 2,332
Other 30,142 9,742
Other liabilities (less current portion) $ 550,587 $ 286,365