Aclara Divestiture (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
	Mar. 28, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net sales		$ 130,495,000	$ 116,922,000	$ 379,707,000	$ 345,478,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Total				(50,442,000)	0
Receivables, Net, Current		9,800,000		9,800,000
Aclara Technologies LLC [Member]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax		15,600,000	(2,800,000)	15,600,000	(17,500,000)
Net sales		0	44,600,000	129,600,000	127,500,000
Proceeds from Divestiture of Businesses, Net of Cash Divested, Total	132,000,000
Noncash or Part Noncash Divestiture, Amount of Consideration Received	10,200,000			5,400,000
Disposal Group, Including Discontinued Operation, Consideration	10,000,000
Noncash Or Part Noncash Divestiture Type Of Consideration Received	5,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax, Total				$ 50,400,000