Bank Indebtedness and Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	$ 245,536	$ 280,334
Senior Secured Second Lien Notes, net of unamortized debt issuance costs	218,404	217,026
Finance lease liabilities	16,223	3,706
Asset-backed term loan	4,386	3,103
Other	6,178	5,028
Total Long-term and Current Term Debt	245,191	228,863
Less: current portion	2,987	1,840
Long-term Debt, Excluding Current Maturities, Total	242,204	227,023
Unamortized Debt Issuance Expense	5,094	6,472
Global Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	241,666	276,776
Bulgarian Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Amount Outstanding	$ 3,870	$ 3,558