Revenue from Contracts with Customers Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue, Major Customer [Line Items]
Net sales	$ 427,534	$ 489,514	$ 524,194
Major Customer
Revenue, Major Customer [Line Items]
Net sales		$ 49,700	$ 65,300
Sales Revenue, Net | Customer Concentration Risk | Major Customer
Revenue, Major Customer [Line Items]
Concentration risk, percentage (less than for the year ended 12/31/20)	10.00%	10.00%	12.00%