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Other Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Other liabilities    
Employee compensation and benefits $ 34,020 $ 21,403
Deferred FCC repack income 44,945 36,770
Programming liability 33,481 57,291
Liability for pension benefits 161,845 190,219
Liabilities for uncertain tax positions 2,332 637
Other 9,742 9,628
Other liabilities (less current portion) $ 286,365 $ 315,948