QUARTERLY RESULTS OF OPERATIONS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Goodwill and Intangible Asset Impairment		$ 24,600							$ 24,621	$ 34,818
Revenue, Net	$ 54,938	56,073	$ 57,673	$ 58,286	$ 65,059	$ 65,138	$ 65,802	$ 63,770
Operating Expenses	46,591	72,156	49,188	55,644	89,338	54,180	55,286	54,610
Operating income (loss)	8,347	(16,083)	8,485	2,642	(24,279)	10,958	10,516	9,160	3,391	6,355	$ 46,604
Net income (loss)	$ 5,478	$ (16,841)	$ 4,854	$ 1,111	$ (28,249)	$ 6,511	$ 5,678	$ 5,092	$ (5,398)	$ (10,968)	$ 27,612
Basic earnings (loss) per share (in dollars per share)	$ 0.12	$ (0.35)	$ 0.10	$ 0.02	$ (0.56)	$ 0.13	$ 0.11	$ 0.10	$ (0.11)	$ (0.21)	$ 0.53
Diluted earnings (loss) per share (in dollars per share)	$ 0.11	$ (0.35)	$ 0.10	$ 0.02	$ (0.56)	$ 0.12	$ 0.11	$ 0.09	$ (0.11)	$ (0.21)	$ 0.51
Impairment of goodwill					$ 34,800				$ 15,369	$ 34,818	$ 0