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Revenue - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Accounting Policies [Line Items]        
Warehouse, processing and delivery expense $ 13,394 $ 18,759 $ 45,584 $ 59,577
Description of revenue timing     Substantially all of the Company's customer contracts are for a duration of less than one year and individual customer purchase orders for contractual customers are fulfilled within one year of the purchase order date.  
Maximum        
Accounting Policies [Line Items]        
Percentage sales revenue not recognized at shipment (less than) 1.00%     1.00%
Shipping and Handling        
Accounting Policies [Line Items]        
Warehouse, processing and delivery expense $ 4,559 $ 5,869    
Shipping and handling costs     $ 15,007 $ 18,165