RESTRUCTURING (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Accelerated Depreciation									$ 1,265	$ 1,361	$ 598
Restructuring expense									2,322	2,585	3,073
Restructuring and Related Cost, Incurred Cost	$ (46)	$ 1,575	$ 518	$ 275		$ 765	$ 1,095	$ 428
Unfavorable impact to operating cash flow									2,806	2,268
Restructuring Reserve	255				$ 739				255	739	422
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									2,194	2,461
Unfavorable impact to operating cash flow									2,771	2,144
Restructuring Reserve	162				739				162	739	422
Employee Severance [Member] | Precise Machine [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									0	287	452
Employee Severance [Member] | Key Valent Employees [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									0	0	2,621
Employee Severance [Member] | Greenville, South Carolina [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									449	0	0
Employee Severance [Member] | Engineering Services Melbourne, Australia Closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									47	0	0
Employee Severance [Member] | Relocation of Machining Operations from Savannah Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									0	47	0
Employee Severance [Member] | Relocation of Machining Parts Operations from St. Charles Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									150	228	0
Employee Severance [Member] | Coweta, Oklahoma Closure [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									94	0	0
Employee Severance [Member] | Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									1,582	2,023	0
Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									128	124
Unfavorable impact to operating cash flow									35	124
Restructuring Reserve	$ 93				0				93	0	0
Selling, General and Administrative Expenses [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost					$ 297
Aerostructures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									1,108	2,074	3,073
Engineering Services [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense									$ 1,214	$ 511	$ 0