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Long-Term Debt - Credit Agreement (Details)
1 Months Ended 12 Months Ended
Jun. 30, 2013
USD ($)
Dec. 31, 2015
USD ($)
foreign_subsidiary
Feb. 29, 2016
USD ($)
Sep. 30, 2013
USD ($)
Debt Instrument [Line Items]        
Number of foreign subsidiaries designated as not subject to Credit Agreement covenants | foreign_subsidiary   5    
Interest Rate Swaps [Member]        
Debt Instrument [Line Items]        
Notional amount       $ 148,100,000
Term Loan Maturing June 2018 [Member]        
Debt Instrument [Line Items]        
Original borrowing capacity $ 300,000,000      
Balloon payment $ 180,000,000      
Maturity date Jun. 19, 2018      
Term Loan Maturing June 2018 [Member] | Interest Rate Swaps [Member]        
Debt Instrument [Line Items]        
Notional amount       $ 148,100,000
Lower range of fixed LIBOR rate (as a percent)       0.74%
Higher range of fixed LIBOR rate (as a percent)       0.75%
Term Loan Maturing June 2018 [Member] | LIBOR [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent)   2.75%    
Term Loan Maturing June 2018 [Member] | Years One And Two [Member]        
Debt Instrument [Line Items]        
Percentage of scheduled principal installments 5.00%      
Scheduled principal installments $ 15,000,000      
Term Loan Maturing June 2018 [Member] | Years Three Through Five [Member]        
Debt Instrument [Line Items]        
Percentage of scheduled principal installments 10.00%      
Scheduled principal installments $ 30,000,000      
Term Loan Maturing June 2018 [Member] | Minimum [Member] | Base Rate [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent)   1.00%    
Term Loan Maturing June 2018 [Member] | Minimum [Member] | LIBOR [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent)   2.00%    
Term Loan Maturing June 2018 [Member] | Maximum [Member] | Base Rate [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent)   3.00%    
Term Loan Maturing June 2018 [Member] | Maximum [Member] | LIBOR [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent)   4.00%    
Revolving Credit Facility Maturing June 2018 [Member]        
Debt Instrument [Line Items]        
Original borrowing capacity 600,000,000      
Increase in aggregate commitments (up to) $ 200,000,000      
Available borrowing capacity   $ 249,400,000    
Letters of credit issued   $ 13,200,000    
Commitment fee percentage   0.50%    
Revolving Credit Facility Maturing June 2018 [Member] | Subsequent Event [Member]        
Debt Instrument [Line Items]        
Original borrowing capacity     $ 400,000,000