Equity Interest Investments - Earnings of affiliates (Details) - USD ($) $ in Thousands	3 Months Ended	5 Months Ended	9 Months Ended
Oct. 05, 2019	Oct. 06, 2018	May 17, 2018	Oct. 05, 2019	Oct. 06, 2018
Equity Interest Investments
Equity in earnings of affiliates	$ 0	$ 0	$ 121	$ 0	$ 121

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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