Goodwill and Intangibles, Finite-Lived Intangible Assets by Major Class and Acquisitions (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 25, 2016
Summary of Other Intangible Assets [Abstract]
Acquired product rights	$ 789,940	$ 789,689
Licensed rights of entertainment properties	256,555	256,555
Accumulated amortization	(904,851)	(876,033)
Amortizable intangible assets	141,644	170,211
Product rights with indefinite lives	75,738	75,738
Total other intangibles, net	217,382	$ 245,949
Intangible Assets, Future Amortization Expense By Year [Abstract]
2018	17,000
2019	36,000
2020	40,000
2021	18,000
2022	$ 17,000