GOODWILL AND INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets [Line Items]
Goodwill, Impairment Loss		$ 24,302	[1]	$ 0	[2]
Intangible Assets [Abstract]
Trademarks		778		778
Customer intangible assets		68,991		68,991
Other		1,274		1,274
Accumulated amortization		(32,191)		(24,461)
Intangible assets, net		38,852		46,582
Amortization expense on intangible assets		3,664		4,359		$ 4,524
Estimated annual amortization expense for these intangibles [Abstract]
2016		3,087
2017		2,854
2018		2,627
2019		2,531
2020		2,482
Thereafter		25,271
Intangible assets, net		$ 38,852		$ 46,582
Customer Intangible Assets [Member]
Intangible Assets [Abstract]
Weighted average estimated useful life		15 years 10 months 24 days
Other [Member]
Intangible Assets [Abstract]
Weighted average estimated useful life		2 years 29 days
Engineering Services [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill, Impairment Loss		$ 24,302	[3]			$ 26,439
Intangible Assets [Abstract]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 4,066
Valent Aerostructures, LLC [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill, Impairment Loss	[2]						$ 73,528

[1] The Company performed its annual impairment analysis of goodwill related to the Aerostructures reporting units during the fourth quarter of 2016 and determined no adjustments to the carrying value were necessary. The value of the goodwill relating to the Engineering Services reporting unit was deemed impaired during 2016 and a $24,302 impairment charge was recorded in the Consolidated Statements of Comprehensive Income (Loss) for the year ended December 31, 2016.

[2] The Company performed its annual impairment analysis of goodwill during the fourth quarter of 2015 and determined no adjustments to the carrying value were necessary.

[3] Includes charges of $4,066 for intangible asset impairment and $24,302 for goodwill impairment in 2016. Includes charges of $26,439 for goodwill impairment in 2014.