INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount									$ 198	$ 5,921	$ 8,432
Effective Income Tax Rate Reconciliation, Tax Credit, Amount									(2,972)	(1,589)	(1,482)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount									(4,055)	(6,047)	(10,542)
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount									2,303	771	516
Effective Income Tax Rate Reconciliation, Deduction, Amount									(6,493)	0	0
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount									9,104	3,132	6,015
Cumulative amount of undistributed earnings of foreign subsidiaries	$ 38,500								38,500
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits at beginning of period				$ 25,847				$ 24,729	25,847	24,729	22,629
Increases for tax positions taken during a prior period									148	1,118	2,205
Decreases related to the lapse of applicable statutes of limitations											(105)
Unrecognized tax benefits at end of period	25,995				$ 25,847				25,995	25,847	24,729
Deferred Tax Assets, Operating Loss Carryforwards, Components [Abstract]
Unrecognized tax benefits including the impact of penalties and interest	26,000				25,800				26,000	25,800	24,700
Unrecognized tax benefits that would impact effective tax rate	3,200				800				3,200	800	800
Current tax expense (benefit):
Net cash payments for income taxes									2,251	2,146	2,173
(Benefit) provision for income taxes	2,306	$ 768	$ (5,550)	561	761	$ 365	$ 622	440	(1,915)	2,188	2,939
Federal									115	14	(104)
State									3	83	114
Foreign benefit of net operating losses									(180)	(180)	(170)
Other foreign									3,734	2,217	2,369
Total current tax expense (benefit)									3,672	2,134	2,209
Deferred tax benefit:
Federal and state									(6,493)	0	0
Other foreign									906	54	730
Total deferred tax benefit									(5,587)	54	730
Income (loss) before income taxes:
United States									(23,977)	(6,864)	(16,414)
Foreign									24,542	23,780	40,506
Income before income taxes	$ (2,079)	$ 11,886	$ (9,634)	$ 392	$ (4,308)	$ 14,605	$ (2,717)	$ 9,336	$ 565	$ 16,916	$ 24,092