Goodwill and Intangible Assets, Goodwill (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 31, 2014	Mar. 31, 2015
Goodwill [Line Items]
Goodwill, Gross	$ 192,694us-gaap_GoodwillGross	$ 192,694us-gaap_GoodwillGross
Goodwill, Impaired, Accumulated Impairment Loss	(105,910)	(105,910)
Goodwill acquired	86,784us-gaap_Goodwill	86,784us-gaap_Goodwill
Aerostructures [Member]
Goodwill [Line Items]
Goodwill, Gross	141,953	141,953
Goodwill, Impaired, Accumulated Impairment Loss	(79,471)	(79,471)
Goodwill acquired	62,482	62,482
Engineering Services [Member]
Goodwill [Line Items]
Goodwill, Gross	50,741	50,741
Goodwill, Impaired, Accumulated Impairment Loss	(26,439)	(26,439)
Goodwill acquired	24,302	24,302
Goodwill, Impairment Loss	$ 26,439

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

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Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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