INCOME TAXES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Loss Carryforwards [Line Items]
Effective tax rate			20.70%	(1.80%)
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount			$ 1,136	$ 0	$ 0
Tax cuts and jobs act of 2017, income tax benefit	$ 970		26,761
Tax cuts and jobs act of 2017, provisional income tax benefit		$ 25,791
Tax cuts and jobs act of 2017, estimated current tax expense for deemed repatriation		1,389	(970)	1,389	0
Tax cuts and jobs act of 2017, measurement period adjustment	970
Tax cuts and jobs act of 2017, current tax expense for deemed repatriation	419
Estimated deferred tax benefit		27,255	0	27,255	0
Reduction in deferred tax assets associated with employee compensation		75
Cap on deductibility on compensation of individual		1,000
Interest and penalties			207	94	$ 94
Accrued interest and penalties	1,839	$ 1,882	1,839	$ 1,882
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Accrued current foreign income tax espense	4,185		4,185
State | Tax Year 2031
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 10,114		$ 10,114