SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Correction of Immaterial Errors on Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Inventories, net	$ 26,342	$ 24,045	$ 24,337
Property and equipment, net	26,524		36,141
Assets	683,579		683,606
Deferred tax liability, net	15,735	19,042	19,367
Liabilities	387,454		376,088
Accumulated deficit	(133,208)	$ (116,429)	(115,433)
Stockholders' Equity Attributable to Parent	$ 296,125		307,518
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Inventories, net			20,496
Property and equipment, net			43,283
Assets			686,907
Deferred tax liability, net			19,174
Liabilities			375,895
Accumulated deficit			(111,939)
Stockholders' Equity Attributable to Parent			311,012
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Inventories, net			3,841
Property and equipment, net			(7,142)
Assets			(3,301)
Deferred tax liability, net			193
Liabilities			193
Accumulated deficit			(3,494)
Stockholders' Equity Attributable to Parent			$ (3,494)