Segment Information (Consolidated Total Assets, Depreciation, Amortization and Capital Expenditures by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Assets	$ 2,539,965	$ 2,397,202	$ 2,218,518
Property, plant and equipment, net	756,100	513,279
Depreciation and amortization	75,235	77,353	74,233
Capital expenditures	286,612	207,106	141,600
Aerospace [Member]
Assets	1,566,421	1,440,355	1,361,861
Depreciation and amortization	46,488	46,895	49,887
Capital expenditures	150,021	134,307	74,964
Energy [Member]
Assets	653,848	610,345	599,007
Depreciation and amortization	20,768	22,672	20,890
Capital expenditures	113,292	55,780	28,137
All Other Segments [Member]
Assets	233,862	273,510	207,535
Unallocated Corporate [Member]
Assets	85,834	72,992	50,115
Depreciation and amortization	7,979	7,786	3,456
Capital expenditures	23,299	17,019	38,499
Total of Reporting Segments [Member]
Assets	2,220,269	2,050,700	1,960,868
Depreciation and amortization	67,256	69,567	70,777
Capital expenditures	$ 263,313	$ 190,087	$ 103,101