Valuation and Qualifying Accounts (Schedule of Valuation and Qualifying Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	$ 3,484	$ 2,853	$ 2,738
Net Charged to Costs and Expenses	482	965	469
Translations, Reclassifications and Acquisitions	101	(185)	(153)
Net Write-Offs or Discounts Taken	(1,566)	(149)	(201)
Balance End of Year	2,501	3,484	2,853
Reserve for sales discounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	15,094	15,999	16,724
Net Charged to Costs and Expenses	77,126	78,304	79,877
Translations, Reclassifications and Acquisitions	(109)	(145)	(98)
Net Write-Offs or Discounts Taken	(78,623)	(79,064)	(80,504)
Balance End of Year	13,488	15,094	15,999
Reserve for inventory obsolescence
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	9,675	7,601	8,596
Net Charged to Costs and Expenses	2,041	5,209	2,938
Translations, Reclassifications and Acquisitions	295	(454)	(297)
Net Write-Offs or Discounts Taken	(4,749)	(2,681)	(3,636)
Balance End of Year	7,262	9,675	7,601
Reserve for warranty
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Year	5,566	5,913	4,994
Net Charged to Costs and Expenses	7,867	7,732	7,467
Translations, Reclassifications and Acquisitions	(49)	(325)	843
Net Write-Offs or Discounts Taken	(8,122)	(7,754)	(7,391)
Balance End of Year	$ 5,262	$ 5,566	$ 5,913