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Long-Term Debt (7% Note Purchase Agreement) (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Oct. 01, 2016
USD ($)
shares
Jul. 02, 2016
USD ($)
shares
Apr. 02, 2016
USD ($)
Jun. 27, 2015
USD ($)
Jul. 02, 2016
USD ($)
shares
Jun. 27, 2015
USD ($)
May 10, 2016
USD ($)
Jan. 02, 2016
USD ($)
Debt Instrument [Line Items]                
Repayment of 7% senior exchangeable notes         $ 27,580 $ 0    
Gains (losses) on extinguishment of debt   $ 51,273   $ (126) 72,886 $ (559)    
Convertible debt [Member] | 7% senior exchangeable notes due 2017 [Member]                
Debt Instrument [Line Items]                
Long-term debt, outstanding principal amount   32,200     $ 32,200     $ 83,300
Debt extinguishment amount   16,500 $ 51,000          
Gains (losses) on extinguishment of debt   5,400 $ 16,500          
Allianz 7% Notes Purchase Agreement [Member] | Allianz [Member] | Convertible debt [Member] | 7% senior exchangeable notes due 2017 [Member]                
Debt Instrument [Line Items]                
Long-term debt, outstanding principal amount             $ 37,500  
Debt exchange rate (percent)             0.6  
Warrants, percentage of common stock outstanding (percent)             3.30%  
Debt extinguishment amount   16,500            
Repayment of 7% senior exchangeable notes   $ 10,100            
Warrants, amount issued (shares) | shares   984,342     984,342      
Subsequent Event [Member] | Allianz 7% Notes Purchase Agreement [Member] | Allianz [Member] | Convertible debt [Member] | 7% senior exchangeable notes due 2017 [Member]                
Debt Instrument [Line Items]                
Debt extinguishment amount $ 21,000              
Repayment of 7% senior exchangeable notes $ 13,000              
Warrants, amount issued (shares) | shares 1,255,485              
Gains (losses) on extinguishment of debt $ 7,400