ACQUISITION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	May. 13, 2015	Dec. 31, 2014
Acquisition [Line Items]
Intangible assets					$ 11,200
Net liabilities					500
Goodwill	$ 156,834		$ 156,834		4,300	$ 156,178
Acquisition Date			May 13, 2015
Total purchase price			$ 15,000
Cash paid			14,000
Holdback amount			1,000
Transaction costs	200		300
Revenues	89,064	$ 85,464	178,069	$ 168,454
Net income (loss)	$ 6,335	$ (1,346)	$ 10,676	$ (12,570)
Basic earnings per share (in usd per share)	$ 0.08	$ (0.02)	$ 0.14	$ (0.17)
Diluted earnings per share (in usd per share)	$ 0.08	$ (0.02)	$ 0.13	$ (0.17)
Customer Relationships [Member]
Acquisition [Line Items]
Intangible assets					800
Useful life			10 years
In Process Research and Development [Member]
Acquisition [Line Items]
Intangible assets					$ 10,400
Useful life			15 years