Goodwill (Narrative) (Details) (USD $)	3 Months Ended	9 Months Ended			3 Months Ended				12 Months Ended
	Sep. 30, 2012	Jun. 30, 2013	Jun. 30, 2013 Aerospace [Member]	Jun. 30, 2013 Energy [Member]	Jun. 30, 2013 Renewable Power Systems Reporting Unit [Member]	Sep. 30, 2012 Minimum [Member]	Sep. 30, 2012 Maximum [Member]	Dec. 31, 2012 Business Acquisition, Acquiree - Duarte Business [Member] Aerospace [Member]	Sep. 30, 2012 U.S. Government Related [Member] Sales [Member]
Goodwill addition		$ 88,163,000	$ 88,163,000	$ 0				$ 88,163,000
Impairment	$ 0				$ 0
Weighted average cost of capital assumption						8.88%	9.60%
Assumed annual compound growth rate after five or ten years	4.05%
Percentage of net sales from major customer									18.00%