Investments Marketable Equity Securities (Details) (USD $)	Mar. 29, 2015	Dec. 28, 2014	Aug. 04, 2014
Schedule of Equity Method Investments [Line Items]
Marketable equity securities	$ 7,414,000	$ 8,958,000
Tribune Publishing Company
Schedule of Equity Method Investments [Line Items]
Tribune Publishing common stock retained, shares			381,354
Ownership percentage in common stock			1.50%
Marketable equity securities	7,000,000
Investment in Tribune Publishing, cost basis	0	0
Gross unrealized holding gain	$ 7,000,000