Revenue Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Average transit time	3 days
Accounts receivable, trade, net	$ 341,104	$ 322,846
Contract assets	6,900	5,900
Contract liabilities	1,500	$ 1,300
Revenue recognized from contract liability during the period	$ 1,300