Valuation and Qualifying Accounts (Schedule of Valuation and Qualifying Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reserve for sales discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	$ 18,123	$ 15,652	$ 13,488
Net Charged to Costs and Expenses	91,962	91,082	82,724
Translations, Reclassifications and Acquisitions	39	(48)	166
Net Write-Offs or Discounts Taken	(93,241)	(88,563)	(80,726)
Balance End of Year	16,883	18,123	15,652
Reserve for inventory obsolescence
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	7,194	6,932	7,262
Net Charged to Costs and Expenses	5,711	3,773	3,007
Translations, Reclassifications and Acquisitions	6,467	(116)	886
Net Write-Offs or Discounts Taken	(11,139)	(3,395)	(4,223)
Balance End of Year	8,233	7,194	6,932
Reserve for warranty
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	4,992	5,335	5,262
Net Charged to Costs and Expenses	8,273	5,815	7,224
Translations, Reclassifications and Acquisitions	4,343	(144)	567
Net Write-Offs or Discounts Taken	(7,359)	(6,014)	(7,718)
Balance End of Year	$ 10,249	$ 4,992	$ 5,335