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Transactions with Related Parties - Additional Information (Detail)
$ in Thousands
12 Months Ended
Jul. 20, 2016
USD ($)
Item
Sep. 30, 2015
USD ($)
Dec. 31, 2016
USD ($)
Jan. 02, 2016
USD ($)
Jan. 03, 2015
USD ($)
Related Party Transaction [Line Items]          
Interest expense, related party     $ 2,530 $ 3,124 $ 3,177
Carrying value of debt     1,078,931 1,258,558  
Oaktree [Member]          
Related Party Transaction [Line Items]          
Interest expense, related party     2,407 3,074 3,133
Accrued interest     6 692  
Carrying value of debt     65,813 31,495  
Oaktree [Member] | 2016 First Lien Term Loan [Member]          
Related Party Transaction [Line Items]          
Carrying value of debt     26,320    
Oaktree [Member] | 2012 Second Lien Term Loan [Member]          
Related Party Transaction [Line Items]          
Carrying value of debt       31,495  
Oaktree [Member] | Senior Unsecured Notes [Member]          
Related Party Transaction [Line Items]          
Interest expense, related party     147    
Accrued interest     147    
Oaktree [Member] | Management Services Agreement [Member]          
Related Party Transaction [Line Items]          
Required quarterly management fee   $ 750      
Fees and out-of-pocket expenses from transaction with related party     $ 5,214 11,566 13,111
Public offering success fee, as a multiple of annual management fee | Item 3        
Public offering fee $ 9,000        
Maine [Member] | Management Services Agreement [Member]          
Related Party Transaction [Line Items]          
Required quarterly management fee   $ 750      
Fees and out-of-pocket expenses from transaction with related party       $ 2,250 $ 3,000