Schedule of Identifiable Assets by Segment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2012
Identifiable assets
Identifiable assets of continuing operations	$ 103,103	$ 106,545
Forged Components Group
Identifiable assets
Identifiable assets of continuing operations	87,916	84,519
Turbine Component Services and Repair Group
Identifiable assets
Identifiable assets of continuing operations	3,443	3,480
Corporate
Identifiable assets
Identifiable assets of continuing operations	11,744	12,063
Assets Held-for-sale
Identifiable assets
Identifiable assets of continuing operations	$ 0	$ 6,483