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Taxes (Operating Loss Carryforwards) (Details)
$ in Thousands
Dec. 30, 2017
USD ($)
Operating loss carryforwards  
Total loss carryforwards $ 120,967
Expires 2018 through 2022  
Operating loss carryforwards  
Total loss carryforwards 37,291
Expires 2023 through 2027  
Operating loss carryforwards  
Total loss carryforwards 26,082
Expires 2028 through 2032  
Operating loss carryforwards  
Total loss carryforwards 5,979
Expires 2033 through 2037  
Operating loss carryforwards  
Total loss carryforwards 32,439
Indefinite  
Operating loss carryforwards  
Total loss carryforwards $ 19,176