INCOME TAXES (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Non-current deferred tax assets:
Net operating loss carryforwards	$ 5,891	$ 5,417
U.S. federal and state tax credits	316	2,577
Non-U.S. deferred tax assets	3,674	2,472
Share-based compensation	2,486	1,750
Accrued expenses	11,527	7,730
Non-current deferred tax liabilities:
Intangible assets	(4,203)	(4,508)
Depreciation	(6,964)	(7,446)
Non-U.S. deferred tax liability	(1,342)	0
Other	(626)	(815)
Deferred tax assets net of deferred tax liabilities	10,759	7,177
Valuation allowance	(3,467)	(3,558)
Deferred tax assets, net	7,292	3,619
Income Taxes
Increase in valuation allowance related to state and foreign losses	100
Undistributed earnings	71,900
Deferred tax liability that would be recognized if earnings were distributed	13,400
Gross amount of net operating losses available for carryover to future years	17,300	14,800
U.S. State
Non-current deferred tax assets:
Net operating loss carryforwards	1,400	1,600
Luxembourg
Non-current deferred tax assets:
Net operating loss carryforwards	2,200	2,300
U.S. State and U.S. Federal
Non-current deferred tax assets:
Net operating loss carryforwards	300	2,600
NCI
Income Taxes
Annual limit on use of operating loss carryforward	1,300
Gross amount of net operating losses available for carryover to future years	$ 6,900	$ 10,100