SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		$ 67,158	$ 72,468	$ 81,514
Costs and expenses		5,841	4,460	4,384
Other accounts		314	5,646	2,560
Deductions		4,946	12,857	16,539
Currency translation adjustments		(1,127)	(2,559)	549
End of period		67,240	67,158	72,468
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		1,062	1,139	2,281
Costs and expenses		135	400	101
Other accounts		0	4	95
Deductions	[1]	271	401	1,362
Currency translation adjustments		(53)	(80)	24
End of period		873	1,062	1,139
Inventory Valuation Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		21,307	22,032	21,535
Costs and expenses		3,995	3,451	3,811
Other accounts		314	16	847
Deductions		2,521	2,533	4,510
Currency translation adjustments		(391)	(1,659)	349
End of period		22,704	21,307	22,032
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of period		44,789	49,297	57,698
Costs and expenses		1,711	609	472
Other accounts		0	5,626	1,618
Deductions		2,154	9,923	10,667
Currency translation adjustments		(683)	(820)	176
End of period		$ 43,663	$ 44,789	$ 49,297

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