INCOME TAXES (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Activity related to unrecognized tax benefits
Beginning Balance	$ 7,125	$ 5,020
Additions for tax positions of prior years	5,819	2,105
Settlements	(2,525)	0
Ending Balance	10,419	7,125	$ 5,020
Total amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate	6,800	4,600
Income Tax Examination, Penalties and Interest Expense	6,200	(460)	597
Total interest and penalties accrued	7,900	1,800
Income Taxes [Line Items]
Foreign pre-tax earnings	4,500	$ 5,300	$ 12,600
Undistributed earnings of foreign subsidiaries	31,000
Amount of unrecognized deferred tax liability	3,100
California Franchise Tax Board
Income Taxes [Line Items]
Tax settlement received	4,700
Income tax benefit due to tax settlement	$ 3,000
State Administration of Taxation, China
Income Taxes [Line Items]
Foreign statutory rate (as a percent)	25.00%