Consolidated Statements of Shareholder's Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Total Shareholders' Equity
Balance at Dec. 31, 2017	$ 1,829,957	$ 104,847	$ 1,050,605	$ 4,260,222	$ (239,425)	$ (3,346,292)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	211,668			211,668			$ 211,668
Issuance of shares for Saban purchase			198,853			81,544	280,397
Other comprehensive earnings (loss)	(35,810)				(35,810)		(35,810)
Stock-based compensation transactions			(2,660)			(1,272)	(3,932)
Purchases of common stock						(192,348)	(192,348)
Stock-based compensation expense			35,607			216	35,823
Dividends declared				(238,474)			(238,474)
Balance at Sep. 30, 2018	1,887,281	104,847	1,282,405	4,254,919	(296,738)	(3,458,152)	1,887,281
Balance at Jul. 01, 2018	1,766,750	104,847	1,263,657	4,070,661	(295,076)	(3,377,339)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	263,861			263,861
Issuance of shares for Saban purchase	0
Other comprehensive earnings (loss)	(1,662)				(1,662)
Stock-based compensation transactions	5,112		6,470			(1,358)
Purchases of common stock	(79,455)					(79,455)
Stock-based compensation expense	12,278		12,278
Dividends declared	(79,603)			(79,603)
Balance at Sep. 30, 2018	1,887,281	104,847	1,282,405	4,254,919	(296,738)	(3,458,152)	1,887,281
Balance at Dec. 30, 2018	1,754,486	104,847	1,275,059	4,184,374	(294,514)	(3,515,280)	1,754,486
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	253,109			253,109			253,109
Other comprehensive earnings (loss)	109,138				109,138		109,138
Stock-based compensation transactions			1,756			14,920	16,676
Purchases of common stock						(60,137)	(60,137)
Stock-based compensation expense			24,551			236	24,787
Dividends declared				(257,152)			(257,152)
Balance at Sep. 29, 2019	1,840,907	104,847	1,301,366	4,180,331	(185,376)	(3,560,261)	1,840,907
Balance at Jun. 30, 2019	1,715,869	104,847	1,290,540	4,053,266	(173,175)	(3,559,609)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	212,949			212,949
Other comprehensive earnings (loss)	(12,201)				(12,201)
Stock-based compensation transactions	2,785		1,933			852
Purchases of common stock	(1,504)					(1,504)
Stock-based compensation expense	8,893		8,893
Dividends declared	(85,884)			(85,884)
Balance at Sep. 29, 2019	$ 1,840,907	$ 104,847	$ 1,301,366	$ 4,180,331	$ (185,376)	$ (3,560,261)	$ 1,840,907