Bank indebtedness and Long-Term Debt (Interest expense and interest income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Debt Disclosure [Abstract]
Interest Expense Gross	$ 29,771	$ 32,090	$ 9,853
Amortization of Debt Issuance Costs	2,825	11,301	5,895
Interest Income	(92)	(116)	(79)
Interest expense, net	$ 32,504	$ 43,275	$ 15,669