Schedule of Identifiable Assets by Segment (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Identifiable assets
Identifiable assets (excluding cash) of continuing operations	$ 98,800	$ 106,545
Forged Components Group
Identifiable assets
Identifiable assets (excluding cash) of continuing operations	84,406	84,518
Turbine Component Services and Repair Group
Identifiable assets
Identifiable assets (excluding cash) of continuing operations	3,172	3,480
Corporate
Identifiable assets
Identifiable assets (excluding cash) of continuing operations	11,222	12,063
Assets Held-for-sale
Identifiable assets
Identifiable assets (excluding cash) of continuing operations	$ 0	$ 6,484