Equity Method Investment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 28, 2014 Payment	Dec. 29, 2013	Dec. 30, 2012
Schedule of Equity Method Investments [Line Items]
Share of losses of Network restructuring	$ 17,278
Royalty benefit as a result of licensing terms modification	2,328
Reduction of payments due to discovery under tax sharing agreement	12,834
Interest in joint venture, Hub Television Networks, LLC. (in hundredths)	40.00%	50.00%	50.00%
Payment for purchase of interest in joint venture	300,000
Present value of total expected future payments at acquisition date based on tax benefits	67,900
Liability associated with investment in joint venture, including imputed interest	55,107	69,749
Payments made to Discovery under tax sharing agreement	7,010	6,541	5,954
Earnings (loss) of joint venture	(9,187)	(2,386)	(6,015)
Minimum royalty guarantee	125,000
Number of annual installments for minimum royalty guarantee	5
Amount of annual installment for minimum royalty guarantee		25,000	25,000
Earn-out period for minimum royalty guarantee (in years)	10 years
Prepaid Royalties related to Hub Network	89,328	101,823
Interest in joint venture	244,587	321,876
Proceeds from partial sale of equity interest in joint venture	64,400	0	0
Equity Method Investment and Joint Venture Investment Restructuring Net Pre-Tax Charges	28,326
Option Agreement	25,340
Issuance of option agreement	(25,590)
Prepaid expenses and other current assets [Member]
Schedule of Equity Method Investments [Line Items]
Prepaid Royalties related to Hub Network	12,207	15,955
Other Assets [Member]
Schedule of Equity Method Investments [Line Items]
Prepaid Royalties related to Hub Network	$ 77,121	$ 85,868