Revenue Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Average transit time	3 days
Accounts receivable, net	$ 322,846	$ 337,927
Contract assets	5,900	7,400
Contract liabilities	1,300	$ 1,700
Revenue recognized from contract liability during the period	$ 1,700