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Other Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Other liabilities    
Employee compensation and benefits $ 21,043 $ 18,520
Programming liability 38,786 54,641
Liability for pension benefits 193,905 207,406
Liabilities for uncertain tax positions 687 644
Other 11,552 12,445
Other liabilities (less current portion) $ 265,973 $ 293,656