INCOME TAXES Uncertain tax positions (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of the total amounts of unrecognized tax benefits
Unrecognized tax benefits at January 1	$ 4,515	$ 4,631	$ 4,673
Change in unrecognized tax benefits during the current period	245	38	134
Reductions to unrecognized tax benefits from lapse of statutes of limitations	(610)	(154)	(176)
Unrecognized tax benefits at December 31	4,150	4,515	4,631
Unrecognized tax benefits that would affect the effective tax rate	500	500	$ 700
Maximum uncertain tax positions expected to lapse in 2016	400
Interest and penalties related to uncertain income tax positions	$ 2,000	$ 2,500
United States
Reconciliation of the total amounts of unrecognized tax benefits
Open tax years for examination	2006
Mexico.
Reconciliation of the total amounts of unrecognized tax benefits
Open tax years for examination	2011
China
Reconciliation of the total amounts of unrecognized tax benefits
Open tax years for examination	2008
The Netherlands
Reconciliation of the total amounts of unrecognized tax benefits
Open tax years for examination	2013

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (d)(3)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319

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The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of unrecognized tax benefits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Unrecognized Tax Benefit
-URI http://asc.fasb.org/extlink&oid=6527854

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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