Bank indebtedness and Long-Term Debt (Interest expense and interest income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Interest Expense Gross	$ 32,155	$ 29,771	$ 32,090
Amortization of debt issuance costs	2,536	2,825	11,301
Interest Income	(285)	(92)	(116)
Interest expense, net	$ 34,406	$ 32,504	$ 43,275