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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Dec. 31, 2017
Income Taxes [Abstract]
Provision for income taxes	$ 20,547		$ 21,518	$ 65,843	$ 55,691
Effective tax rate	27.90%		34.10%	32.00%	33.40%
Net deferred tax assets	$ 5,400			$ 5,400
Net deferred tax liabilities							$ 2,900
Minimum [Member]
Income Taxes [Abstract]
Decrease in unrecognized tax benefits within the next 12 months that is reasonably possible	100			$ 100
Maximum [Member]
Income Taxes [Abstract]
Statute of limitations related to income tax examinations				10 years
Income Taxes [Abstract]
Decrease in unrecognized tax benefits within the next 12 months that is reasonably possible	$ 1,000			$ 1,000
Mainland China [Member]
Income Taxes [Abstract]
Foreign earnings permanently reinvested						$ 60,000
Indonesia [Member]
Income Taxes [Abstract]
Tax assessment		$ 5,800

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Statute of limitations period related to income tax examinations in certain countries, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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