GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill

The following table summarizes the net carrying amount of goodwill by segment at December 31, 2016 and 2015, respectively:

							Engineering
	Aerostructures						Services						Total
	2016			2015			2016			2015			2016			2015
Balance at December 31,
Gross Goodwill	$	141,953		$	141,953		$	50,741		$	50,741		$	192,694		$	192,694
Accumulated impairment loss	(79,471		)	(79,471		)	(50,741		)	(26,439		)	(130,212		)	(105,910		)
Net Goodwill	$	62,482		$	62,482		$	—		$	24,302		$	62,482		$	86,784

Finite and infinite lived intangible assets

Intangible assets primarily consist of trademarks and customer intangibles resulting from the acquisitions of Versaform Corporation, D3, Intec, TASS, and Valent.  The trademarks resulted from the acquisitions of Intec, TASS, and Valent are fully amortized at December 31, 2016. Customer intangibles have a remaining weighted average useful life of 15.9 years and other intangible assets have a remaining weighted average useful life of 2.1 years.  The carrying values were as follows:

	December 31,
	2016			2015
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

Estimated annual amortization expense

The estimated annual amortization expense for intangible assets is as follows:

Year ending December 31,
2017	$	3,087
2018	2,854
2019	2,627
2020	2,531
2021	2,482
Thereafter	25,271
	$	38,852