Investment Income, Net (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
Aug. 16, 2018	Sep. 30, 2018	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Net Investment Income
Gain on sale of investments, net			$ 450,000	$ 2,570	$ 497
Other than temporary loss on other investments in equity securities			0	(258)	0
Other, net			736	391	226
Investment income, net		$ 450,133	$ 450,736	$ 2,703	$ 723
Inspire Brands, Inc
Net Investment Income
Proceeds from sale of Inspire Brands investment	$ 450,000

For investments in debt and equity securities accounted for at cost, the excess of net sale proceeds over the carrying amount of investments disposed of during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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