Bank indebtedness and Long-Term Debt (Long term debt table) (Details) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Senior Secured Second Lien Notes	$ 215,782	$ 222,163
Principal Amount Outstanding On Loans Securitized	3,600	0
Capital Lease Obligations	5,651	7,454
Other Long-term Debt	3,000	1,470
Total Long-term and Current Term Debt	228,033	231,087
Current portion of long-term debt	2,228	2,079
Long-term Debt, Excluding Current Maturities, Total	225,805	229,008
Unamortized Debt Issuance Expense	$ 7,716	$ 8,835