Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2012	Jun. 30, 2012
Goodwill [Line Items]
Goodwill		$ 53,675
Cumulative impairment loss		(25,000)	[1]
Goodwill	30,975
Goodwill [Roll Forward]
Net balance at June 30, 2012	28,675
Purchase of Pelichem	2,237
Translation adjustment	63
Net balance at December 31, 2012	30,975
Electrical Infrastructure [Member]
Goodwill [Line Items]
Goodwill		29,666
Cumulative impairment loss		(17,653)	[1]
Goodwill	12,013
Goodwill [Roll Forward]
Net balance at June 30, 2012	12,013
Purchase of Pelichem	0
Translation adjustment	0
Net balance at December 31, 2012	12,013
Oil Gas & Chemical [Member]
Goodwill [Line Items]
Goodwill		5,841
Cumulative impairment loss		(3,000)	[1]
Goodwill	5,078
Goodwill [Roll Forward]
Net balance at June 30, 2012	2,841
Purchase of Pelichem	2,237
Translation adjustment	0
Net balance at December 31, 2012	5,078
Storage Solutions [Member]
Goodwill [Line Items]
Goodwill		11,071
Cumulative impairment loss		(922)	[1]
Goodwill	10,212
Goodwill [Roll Forward]
Net balance at June 30, 2012	10,149
Purchase of Pelichem	0
Translation adjustment	63
Net balance at December 31, 2012	10,212
Industrial [Member]
Goodwill [Line Items]
Goodwill		7,097
Cumulative impairment loss		(3,425)	[1]
Goodwill	3,672
Goodwill [Roll Forward]
Net balance at June 30, 2012	3,672
Purchase of Pelichem	0
Translation adjustment	0
Net balance at December 31, 2012	$ 3,672

[1] A $25.0 million impairment charge was recorded in February 2005 as a result of the Company’s operating performance in fiscal 2005.