SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period	$ 72,468		$ 81,514		$ 86,176
Costs and expenses	4,460		4,384		4,733
Other accounts	5,646		2,560		2,904
Deductions	12,857		16,539		13,092
Currency translation adjustments	(2,559)		549		793
End of period	67,158		72,468		81,514
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period	1,139		2,281		2,750
Costs and expenses	400		101		198
Other accounts	4		95		0
Deductions	401	[1]	1,362	[1]	710	[1]
Currency translation adjustments	(80)		24		43
End of period	1,062		1,139		2,281
Inventory Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period	22,032		21,535		20,431
Costs and expenses	3,451		3,811		3,597
Other accounts	16		847		0
Deductions	2,533		4,510		2,988
Currency translation adjustments	(1,659)		349		495
End of period	21,307		22,032		21,535
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period	49,297		57,698		62,995
Costs and expenses	609		472		938
Other accounts	5,626		1,618		2,904
Deductions	9,923		10,667		9,394
Currency translation adjustments	(820)		176		255
End of period	$ 44,789		$ 49,297		$ 57,698

[1] (1) Uncollectable accounts written off, net of recoveries.