DISCONTINUED OPERATIONS (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Oct. 01, 2014	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Discontinued Operations, Disposal [Abstract]
Cash consideration			$ 0	$ 0	$ 6,830
Gain on sale of discontinued operations, net of tax			0	0	718
Discontinued Operations, Income Statement Disclosures [Abstract]
Income (loss) from operations, net of tax			0	0	(77)
Gain on sale of discontinued operations, net of tax			0	0	718
AMK Technical Services [Member]
Discontinued Operations, Disposal [Abstract]
Net proceeds	$ 6,830
Cash consideration	4,330
Secured promissory note receivable	$ 2,500
Secured promissory note receivable, term	90 days
Gain on sale of discontinued operations, net of tax		$ 1,476	0	0	718
Discontinued Operations, Income Statement Disclosures [Abstract]
Net sales			0	0	4,540
Income (loss) from operations			0	0	(76)
Tax provision			0	0	1
Income (loss) from operations, net of tax			0	0	(77)
Gain on sale of discontinued operations			0	0	1,476
Tax provision			0	0	758
Gain on sale of discontinued operations, net of tax		$ 1,476	$ 0	$ 0	$ 718