INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
TCJA, additional tax expense	$ 11,600
TCJA, tax on deemed repatriated earnings of foreign subsidiaries	8,000
TCJA, remeasurement of deferred tax assets	2,900
TCJA, reductions in tax benefits on stock compensation	700
Valuation allowance
Valuation allowance at beginning of year	6,507	$ 3,969
Change in valuation allowance	(6,483)	2,538
Valuation allowance at end of year	24	6,507	$ 3,969
Foreign earnings from continuing operations before income tax	22,100	$ 6,400	$ 17,000
Foreign and state
Valuation allowance
Net operating loss carryforwards	148,000
Foreign
Valuation allowance
Net operating loss carryforwards, valuation allowance	100
Increase in valuation allowance, net operating losses	$ 6,500