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Bank Borrowings - Additional Information (Detail) - USD ($)
12 Months Ended
Feb. 26, 2016
Feb. 25, 2016
Jan. 31, 2016
Jul. 27, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Line of Credit Facility [Line Items]              
Asset coverage ratio         125.00%    
Frequency of payments for commitment fees         Quarterly    
Commitment fees         $ 75,000 $ 207,000 $ 154,000
Interest cost         2,973,000 135,000 10,000
Line of credit facility, current         33,000,000 25,000,000  
Line of credit facility, long term         55,000,000    
Repayments on bank borrowings         7,000,000    
Property, Plant and Equipment              
Line of Credit Facility [Line Items]              
Interest cost capitalized         $ 2,038,000 0 $ 0
Minimum              
Line of Credit Facility [Line Items]              
Commitment fees on unused line of credit, percentage         0.375%    
Maximum              
Line of Credit Facility [Line Items]              
Commitment fees on unused line of credit, percentage         0.50%    
Subsequent Event              
Line of Credit Facility [Line Items]              
Asset coverage ratio     121.00%        
Line of credit facility, amount outstanding   $ 71,900,000          
Repayments on bank borrowings $ 16,100,000 $ 16,100,000          
Revolving Credit Facility              
Line of Credit Facility [Line Items]              
Line of credit amendment date         Jul. 27, 2015    
Line of credit, maximum borrowing capacity         $ 100,000,000    
Line of credit facility, amount outstanding         88,000,000 $ 25,000,000  
Line of credit facility, current         33,000,000    
Line of credit facility, long term         $ 55,000,000    
Line of credit, weighted average interest rate         4.664% 2.625%  
Standby Letters of Credit              
Line of Credit Facility [Line Items]              
Line of credit, maximum borrowing capacity         $ 8,875,000    
Fourth Amendment | Revolving Credit Facility              
Line of Credit Facility [Line Items]              
Line of credit, maximum borrowing capacity       $ 90,000,000      
Revolving credit facility, maturity date       Dec. 31, 2018      
Asset coverage ratio       125.00%      
Capital expenditures       $ 65,000,000      
Proforma liquidity       $ 15,000,000      
Fourth Amendment | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)              
Line of Credit Facility [Line Items]              
Revolving Credit Facility, percentage points added to the reference rate       4.00%      
Fourth Amendment | Standby Letters of Credit              
Line of Credit Facility [Line Items]              
Line of credit, maximum borrowing capacity       $ 9,500,000