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Other Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Other liabilities    
Employee compensation and benefits $ 36,614 $ 34,020
Deferred FCC repack income 44,442 44,945
Programming liability 207,093 33,481
Liability for pension benefits 154,212 161,845
Liabilities for uncertain tax positions 21,760 2,332
Liability for common stock warrants 248,084 0
Other 27,116 9,742
Other liabilities (less current portion) $ 739,321 $ 286,365