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Basis of Presentation - Revenue, Initial Application Period Cumulative Effect Transition (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Jan. 01, 2018
Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Accounts receivable, net $ 265,240   $ 78,569 $ 94,725
Deferred taxes, net 82,698   96,369 91,398
Income tax liability 3,905     1,295
Retained earnings 374,758   312,896 $ 324,081
Net sales 403,191 $ 308,927    
Income tax provision 17,219 13,206    
Net income 62,731 $ 25,880    
Accounting Standards Update 2014-09 | Calculated under Revenue Guidance in Effect before Topic 606 [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Accounts receivable, net 289,839      
Deferred taxes, net 77,008      
Income tax liability 5,004      
Retained earnings 392,568      
Net sales 411,634      
Income tax provision 19,037      
Net income 69,356      
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]        
Accounts receivable, net (24,599)   (16,156)  
Deferred taxes, net 5,690   4,971  
Income tax liability (1,099)      
Retained earnings (17,810)   $ (11,185)  
Net sales (8,443)      
Income tax provision (1,818)      
Net income $ (6,625)