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LONG-TERM DEBT (Details)
3 Months Ended 12 Months Ended
Jan. 16, 2018
USD ($)
shares
Mar. 31, 2020
USD ($)
Dec. 31, 2019
Mar. 31, 2020
USD ($)
Feb. 01, 2018
USD ($)
Debt Instrument [Line Items]          
Stock authorized to repurchase under stock repurchase program (in shares) | shares 25,000,000        
Repaid borrowings       $ 100,000,000.0  
Line of credit | Senior secured revolving credit facility          
Debt Instrument [Line Items]          
Debt term 5 years        
Credit facility $ 1,000,000,000.0 $ 1,000,000,000.0   1,000,000,000.0  
Amount outstanding under credit facility   $ 450,000,000   $ 450,000,000 $ 300,000,000
Commitment fee percentage     0.25%    
Debt default, acceleration clause, required consent percentage   50.00%   50.00%  
Debt issuance costs   $ 12,200,000   $ 12,200,000  
Unamortized debt issuance costs   4,900,000   4,900,000  
Line of credit | Senior secured revolving credit facility | Prepaid expenses and other current assets          
Debt Instrument [Line Items]          
Unamortized debt issuance costs   1,700,000   1,700,000  
Line of credit | Senior secured revolving credit facility | Other assets          
Debt Instrument [Line Items]          
Unamortized debt issuance costs   $ 3,200,000   $ 3,200,000  
Line of credit | Senior secured revolving credit facility | Maximum          
Debt Instrument [Line Items]          
Leverage ratio   3.50 2.75 3.50  
Commitment fee percentage     0.30%    
Line of credit | Senior secured revolving credit facility | Maximum | Foreign Subsidiaries          
Debt Instrument [Line Items]          
Voting stock pledge limit for any foreign subsidiary   65.00%   65.00%  
Line of credit | Senior secured revolving credit facility | Minimum          
Debt Instrument [Line Items]          
Leverage ratio     1.50    
Commitment fee percentage     0.15%    
Line of credit | Senior secured revolving credit facility | Federal funds effective rate          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate       0.50%  
Line of credit | Senior secured revolving credit facility | LIBOR          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate       1.00%  
Line of credit | Senior secured revolving credit facility | LIBOR | LIBOR loans          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate     1.50%    
Line of credit | Senior secured revolving credit facility | LIBOR | LIBOR loans | Maximum          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate   2.00%      
Line of credit | Senior secured revolving credit facility | LIBOR | LIBOR loans | Minimum          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate   1.00%      
Line of credit | Senior secured revolving credit facility | Base rate | Base rate loans          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate     0.50%    
Line of credit | Senior secured revolving credit facility | Base rate | Base rate loans | Maximum          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate   1.00%      
Line of credit | Senior secured revolving credit facility | Base rate | Base rate loans | Minimum          
Debt Instrument [Line Items]          
Interest rate in excess of effective rate   0.00%      
Line of credit | Letter of credit sub-facility          
Debt Instrument [Line Items]          
Credit facility $ 75,000,000.0