BASIS OF PRESENTATION AND ORGANIZATION (Details) - USD ($) $ in Thousands	3 Months Ended										9 Months Ended		12 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2017
Organization Consolidation And Presentation Of Financial Statements Abstract
CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption															$ 5,112
NewAccountingPronouncementOrChangeInAccountingPrincipleRetrospectiveAdjustmentsAbstract
Cumulative Effect Adj- Modified Retrospective - Gross Impact on Accum Deficit															4,900
Cumulative Effect Adj - Modified Retrospective - Net Impact on Accumulated Deficit											$ 4,600
Cumulative Effect Adj - Modified Retrospective - Tax Impact on Accum Deficit															$ 300
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales Revenue, Net	$ 122,299	$ 99,001	$ 124,550	$ 121,641	$ 121,571	$ 97,009	$ 118,614	$ 115,536	$ 101,322	$ 79,009	346,270	$ 340,221	$ 464,771	$ 414,481
Operating Costs and Expenses	$ 87,853	77,166	82,828	84,089	83,732	72,621	78,013	82,115	70,730	59,956	$ 256,022	$ 240,442	323,270	290,814
As Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales Revenue, Net		97,452	123,207	120,457	120,478	96,103	117,704	114,662	100,592	78,420			460,245	411,378
Operating Costs and Expenses		75,617	81,485	82,905	82,639	71,715	77,103	81,241	70,000	59,367			318,744	287,711
Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Sales Revenue, Net		1,549	1,343	1,184	1,093	906	910	874	730	589			4,526	3,103
Operating Costs and Expenses		$ 1,549	$ 1,343	$ 1,184	$ 1,093	$ 906	$ 910	$ 874	$ 730	$ 589			$ 4,526	$ 3,103