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Long-Term Debt - Additional Information (Detail)
1 Months Ended 12 Months Ended
Aug. 31, 2015
USD ($)
Aug. 30, 2015
USD ($)
Aug. 30, 2010
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2015
EUR (€)
Jan. 15, 2015
USD ($)
Debt Instrument [Line Items]                
Maximum borrowing capacity       $ 7,000,000 $ 6,300,000 $ 7,000,000 € 5,800,000  
Available capacity under the revolving credit facility               $ 100,000,000
Restricted cash       34,424,000   $ 34,424,000    
Debt issuance costs incurred         $ 1,825,000      
Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Maximum borrowing capacity     $ 200,000,000          
2010 Agreement [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Debt instrument term (in years)         5 years      
Repayment of debt obligation       $ 20,000,000        
Amount outstanding under lines of credit   $ 0     $ 0      
Revolving credit facility expiration date         Aug. 30, 2015      
2010 Term Loan Facility [Member]                
Debt Instrument [Line Items]                
Maximum borrowing capacity     $ 100,000,000          
2010 Term Loan Facility [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Debt instrument term (in years)         5 years      
2010 Revolving Credit Facility [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Effective interest rate (as a Percent)       2.70%   2.70%    
2015 Credit Agreement [Member]                
Debt Instrument [Line Items]                
Restricted cash         $ 0      
Credit agreement maturity date         Aug. 31, 2020      
2015 Credit Agreement [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Debt instrument term (in years)         5 years      
Maximum borrowing capacity $ 125,000,000              
Maximum borrowing capacity available for issuance of letters of credit 25,000,000              
Maximum additional borrowing capacity $ 50,000,000              
Line of credit, leverage ratio 3.0              
Line of credit, interest coverage ratio 300.00%              
Debt issuance costs incurred   $ 1,800,000     $ 1,700,000 $ 400,000    
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member]                
Debt Instrument [Line Items]                
Maximum borrowing capacity available for working capital and other general corporate purposes $ 50,000,000              
Line of credit facility, unused commitment fee percentage 0.40%              
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | LIBOR [Member]                
Debt Instrument [Line Items]                
Margin on variable rate 2.50%              
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Maximum [Member] | Base Rate [Member]                
Debt Instrument [Line Items]                
Margin on variable rate 1.50%              
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member]                
Debt Instrument [Line Items]                
Line of credit facility, unused commitment fee percentage 0.25%              
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | LIBOR [Member]                
Debt Instrument [Line Items]                
Margin on variable rate 1.75%              
2015 Credit Agreement [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Base Rate [Member]                
Debt Instrument [Line Items]                
Margin on variable rate 0.75%