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Long-Term Debt Senior Secured Second Lien Notes (Details) - USD ($)
12 Months Ended
Jun. 23, 2017
Dec. 31, 2017
Jan. 01, 2017
Jan. 03, 2016
Apr. 29, 2015
May 30, 2012
Debt Instrument [Line Items]            
Proceeds from issuance of senior secured second lien notes   $ 79,875,000 $ 0 $ 200,000,000    
Interest Rate         8.00% 11.25%
Debt Instrument, Face Amount $ 75,000,000          
Proceeds from Issuance of Debt 35,500,000          
Repayments of Debt 42,600,000          
Debt Issuance Costs, Net $ 1,800,000 4,770,000 3,815,000      
Loss on extinguishment of debt   $ 0 $ 0 $ 12,635,000    
Senior Notes, Amount Redeemable with Proceeds from Equity Offerings   35.00%        
Collateral exclusion for material subsidiaries, percentage of Senior Notes   20.00%        
Senior Notes, Cross Default Provision, Minimum Debt Principal Amount   $ 20,000,000        
Debt Instrument, Redemption, Period Two [Member]            
Debt Instrument [Line Items]            
Senior Notes, Redemption Price   1.04        
Debt Instrument, Redemption, Period Three [Member]            
Debt Instrument [Line Items]            
Senior Notes, Redemption Price   1.02        
Debt Instrument, Redemption, Period Four [Member]            
Debt Instrument [Line Items]            
Senior Notes, Redemption Price   1.00        
Debt Instrument, Redemption, Period One [Member]            
Debt Instrument [Line Items]            
Senior Notes, Redemption Price   $ 1.00