INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Unrecognized tax benefits including the impact of penalties and interest	$ 1,000				$ 26,000				$ 1,000	$ 26,000	$ 25,800
Unrecognized tax benefits that would impact effective tax rate	1,000				3,200				1,000	3,200	800
Reconciliation of Income Tax Provision to Statutory Tax Rate [Abstract]
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount									15,870	198	5,921
Effective Income Tax Rate Reconciliation, Tax Credit, Amount									(2,468)	(2,972)	(1,589)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount									(12,662)	(4,055)	(6,047)
Effective Income Tax Rate Reconciliation, Tax Contingency, Uncertain Tax Positions									(6,710)	0	0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount									670	2,303	771
Effective Income Tax Rate Reconciliation, Deduction, Note Issuance									0	(6,493)	0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount									2,509	0	0
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount									(84)	9,104	3,132
Total (benefit from) provision for income taxes	1,108	$ (5,321)	$ 703	$ 635	2,306	$ 768	$ (5,550)	$ 561	(2,875)	(1,915)	2,188
Cumulative amount of undistributed earnings of foreign subsidiaries	40,500								40,500
Income (loss) from operations before income taxes:
United States									12,402	(23,977)	(6,864)
Foreign									32,942	24,542	23,780
Total income from operations before income taxes	6,329	3,797	13,643	21,575	(2,079)	11,886	(9,634)	392	45,344	565	16,916
Current tax expense (benefit):
Net cash payments for income taxes									1,587	2,251	2,146
Federal									102	115	14
State									32	3	83
Foreign benefit of net operating losses									(1,247)	(180)	(180)
Other foreign									(48)	3,734	2,217
Total current tax expense (benefit)									(1,161)	3,672	2,134
Deferred tax (benefit) expense:
Federal benefit related a Note issuance									0	(6,493)	0
Federal									96	0	0
Other foreign									(1,810)	906	54
Total deferred tax (benefit) expense									(1,714)	(5,587)	54
Total (benefit from) provision for income taxes	1,108	$ (5,321)	$ 703	635	2,306	$ 768	$ (5,550)	561	(2,875)	(1,915)	2,188
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits at beginning of period				$ 25,995				$ 25,847	25,995	25,847	24,729
Increases for tax positions taken during a prior period									1,041	148	1,118
Decreases for tax positions taken during a prior period									(25,995)
Unrecognized tax benefits at end of period	$ 1,041				$ 25,995				$ 1,041	$ 25,995	$ 25,847