Receivables, net - Allowances For Discounts, Returns, Claims And Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of year	$ 61,921	$ 74,718	$ 86,103
Acquisitions	0	382	4,240
Additions charged to net sales or costs and expenses	384,403	387,253	317,716
Deductions	362,642	400,432	333,341
Balance at end of year	$ 83,682	$ 61,921	$ 74,718