Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities [Abstract]
Employee related costs	$ 98,661	$ 89,753
Participations and residuals	106,785	70,682
Interest	29,345	29,767
Other accrued expenses	85,214	61,012
Total accrued liabilities	$ 320,005	$ 251,214