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Revenue - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Accounting Policies [Line Items]        
Description of revenue timing     Substantially all of the Company's customer contracts are for a duration of less than one year.  
Maximum        
Accounting Policies [Line Items]        
Percentage sales revenue not recognized at shipment (less than) 1.00% 1.00% 1.00% 1.00%
Shipping and Handling        
Accounting Policies [Line Items]        
Shipping and handling costs $ 6,160 $ 6,813 $ 12,296 $ 13,605