Business Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Segment	Mar. 31, 2012
Business Segment Information [Abstract]
Number of reportable segments	2
Information about reported segments on the basis used internally to evaluate segment performance [Abstract]
Net sales	$ 106,066	$ 66,749
Income from operations	6,073	7,438
Aerostructures [Member]
Information about reported segments on the basis used internally to evaluate segment performance [Abstract]
Net sales	83,014	41,482
Income from operations	5,428	4,754
Engineering Services [Member]
Information about reported segments on the basis used internally to evaluate segment performance [Abstract]
Net sales	23,646	25,567
Income from operations	649	2,678
Eliminations [Member]
Information about reported segments on the basis used internally to evaluate segment performance [Abstract]
Net sales	(594)	(300)
Income from operations	$ (4)	$ 6