Receivables (Allowances For Discounts, Returns, Claims And Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	$ 78,947	$ 72,603	$ 77,037
Acquisitions	0	7,750	0
Additions charged to costs and expenses	296,419	272,329	252,982
Deductions	297,031	273,735	257,416
Balance at end of year	$ 78,335	$ 78,947	$ 72,603