Acquisition - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended			12 Months Ended
	Dec. 29, 2019	Oct. 31, 2019	May 31, 2019	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 8,761	$ 155,451	$ 0
Pension Settlement	$ 185		$ 110,777	110,962	0	0
Goodwill	494,584			494,584	485,881	573,063
Program production costs				33,851	$ 131,984	$ 48,003
Tuque Games
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		$ 8,761
Power rangers and other entertainment assets
Business Acquisition [Line Items]
Total purchase price to be allocated				535,850
Finite-lived intangible assets acquired				$ 534,370
Finite-lived intangible assets, remaining amortization period				25 years
Other assets, current	7,884			$ 7,884
Program production costs				325
Other liabilities, current	$ 6,729			6,729
Payments to acquire businesses, gross				$ 152,000