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Long-term Debt (Details) - USD ($)
1 Months Ended 6 Months Ended
May. 12, 2014
Jun. 30, 2015
May. 31, 2015
Jun. 30, 2015
Jun. 23, 2015
Dec. 31, 2014
Debt Instrument [Line Items]            
Less: current portion   $ 0   $ 0   $ (38,732,000)
Long-term Debt   $ 0   0   37,768,000
Forbearance Agreement [Member]            
Debt Instrument [Line Items]            
Prepayments on term loan       $ 250,000    
Percentage of exceeded cash on hand to be paid against revolving loans (in hundredths)   100.00%   100.00%    
Minimum amount of cash specified against payment of revolving loans   $ 7,000,000   $ 7,000,000    
Revolving loans payable   500,000,000   500,000,000    
Lenders fee   750,000 $ 750,000      
Fee Payment Each Month For May and June 2015 [Member] | Forbearance Agreement [Member]            
Debt Instrument [Line Items]            
Lenders fee   750,000 $ 750,000      
Senior-Secured Credit Facilities [Member]            
Debt Instrument [Line Items]            
Senior-secured credit facilities   0   0   $ 76,500,000
Maximum borrowing capacity $ 85,000,000          
Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity 10,000,000          
Term Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 75,000,000          
Repayment period 4 years          
Prepayments on term loan       125,000    
Minimum amount of cash specified against payment of revolving loans   $ 5,000,000   $ 5,000,000    
XTRAC and VTRAC Business [Member]            
Debt Instrument [Line Items]            
Facilities and ancillary costs         $ 40,300,000