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Share Repurchases Share Repurchase Program (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jul. 28, 2017
Equity, Class of Treasury Stock [Line Items]        
Factoring Fee 0.20%      
Debt Instrument, Basis Spread on Variable Rate 0.50%      
Shares Paid for Tax Withholding for Share Based Compensation 524,403.00      
Payments Related to Tax Withholding for Share-based Compensation $ 16,005      
Stock Repurchased During Period, Shares 3,363,000 (3,902,000) 3,656,000  
Treasury Stock Acquired, Average Cost Per Share $ 30.52      
Stock Repurchased During Period, Value $ 105,924 $ 99,412 $ 86,005  
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 90,942     $ 200,000
London Interbank Offered Rate (LIBOR) [Member]        
Equity, Class of Treasury Stock [Line Items]        
Debt Instrument, Basis Spread on Variable Rate 2.50%      
Common Stock [Member]        
Equity, Class of Treasury Stock [Line Items]        
Stock Repurchased During Period, Shares (2,839,000)      
Treasury Stock Acquired, Average Cost Per Share $ 31.68      
Stock Repurchased During Period, Value $ 89,919      
Private Label [Member]        
Equity, Class of Treasury Stock [Line Items]        
Factoring Fee 0.14%