Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended									1 Months Ended		1 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Trademarks [Member]	Dec. 31, 2012 Trademarks [Member]	Mar. 31, 2013 Customer Intangible Assets [Member]	Dec. 31, 2012 Customer Intangible Assets [Member]	Mar. 31, 2013 Other [Member]	Dec. 31, 2012 Other [Member]	Jul. 31, 2007 D3 Technologies, Inc. [Member]	Mar. 31, 2013 D3 Technologies, Inc. [Member] Trademarks [Member]	Jan. 31, 2009 Integrated Technologies, Inc. [Member]	Aug. 31, 2012 TASS, Inc. [Member]	Dec. 31, 2012 Valent Aerostructures, LLC [Member]	Mar. 31, 2012 Valent Aerostructures, LLC [Member]
Goodwill [Abstract]
Goodwill acquired										$ 42,908		$ 6,194	$ 6,628	$ 123,584	$ 123,862
Intangible Assets [Abstract]
Indefinite-Lived Trademarks											4,222
Trademarks	5,000		5,000
Customer intangible assets	68,991		68,991
Other	1,481		1,481
Accumulated amortization	(12,300)		(11,138)	314	261	11,409	10,360	577	517
Intangible assets, net	63,172		64,334
Amortization expense on intangible assets	$ 1,162	$ 494