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Debt - $110.0 million Credit Agreement (Details) (USD $)
0 Months Ended 9 Months Ended
Sep. 28, 2014
Letter of credit
May 14, 2014
Letter of credit
May 14, 2014
Swing line loan
May 14, 2014
Revolving credit facility
Sep. 28, 2014
Revolving credit facility
May 14, 2014
Revolving credit facility
Sep. 28, 2014
Revolving credit facility
Federal Funds rate
Sep. 28, 2014
Revolving credit facility
LIBOR rate
Sep. 28, 2014
Revolving credit facility
Base rate
Minimum
Sep. 28, 2014
Revolving credit facility
Base rate
Maximum
Sep. 28, 2014
Revolving credit facility
Eurodollar rate
Minimum
Sep. 28, 2014
Revolving credit facility
Eurodollar rate
Maximum
Line of Credit Facility [Line Items]                        
Maximum borrowing capacity   $ 50,000,000.0 $ 10,000,000.0     $ 110,000,000.0            
Potential maximum borrowing capacity, subject to Lender approval           135,000,000.0            
Fixed charge coverage ratio         1.15              
Base rate (the greater of prime rate or 0.5% over federal funds rate)             0.50%          
Base rate (floor, 1.0% over one-month LIBOR)               1.00%        
Basis spread on variable rate                 1.50% 2.00% 2.50% 3.00%
Outstanding borrowings 12,400,000       41,000,000              
Remaining borrowing capacity         $ 43,300,000              
Debt Instrument, Maturity Period       5 years