ASSETS HELD FOR SALE, DISCONTINUED OPERATIONS AND DISPOSITIONS Income of Disposal Group (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of goodwill		$ 0	$ 0	$ 6,980
Loss on disposal of Hexis		$ 0	0	$ 27,593
Hexis | Commercial Cyber Solutions | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues			2,894
Costs of Revenues, excluding amortization			1,881
Operating expenses			16,225
Impairment of goodwill			6,980
Intangible amortization expense			381
Loss on disposal of Hexis	$ 5,500		5,509
Loss before Income Taxes from Discontinued Operations			(28,082)
Income tax benefit, net on discontinued operations			(489)
Loss on Discontinued Operations			$ (27,593)