Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2014		Jun. 30, 2014
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	$ 156
Goodwill, Acquired During Period	2,586	[1]
Goodwill			94,837
Cumulative impairment loss			(25,000)	[2]
Goodwill	72,065
Goodwill [Roll Forward]
Net balance at June 30, 2013	69,837
Translation adjustment	(514)	[3]
Net balance at September 30, 2014	72,065
Electrical Infrastructure [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	117
Goodwill, Acquired During Period	0	[1]
Goodwill			60,896
Cumulative impairment loss			(17,653)	[2]
Goodwill	43,062
Goodwill [Roll Forward]
Net balance at June 30, 2013	43,243
Translation adjustment	(298)	[3]
Net balance at September 30, 2014	43,062
Oil Gas & Chemical [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	2,586	[1]
Goodwill			13,943
Cumulative impairment loss			(3,000)	[2]
Goodwill	13,529
Goodwill [Roll Forward]
Net balance at June 30, 2013	10,943
Translation adjustment	0	[3]
Net balance at September 30, 2014	13,529
Storage Solutions [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	0	[1]
Goodwill			10,949
Cumulative impairment loss			(922)	[2]
Goodwill	9,910
Goodwill [Roll Forward]
Net balance at June 30, 2013	10,027
Translation adjustment	(117)	[3]
Net balance at September 30, 2014	9,910
Industrial [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	39
Goodwill, Acquired During Period	0	[1]
Goodwill			9,049
Cumulative impairment loss			(3,425)	[2]
Goodwill	5,564
Goodwill [Roll Forward]
Net balance at June 30, 2013	5,624
Translation adjustment	(99)	[3]
Net balance at September 30, 2014	$ 5,564

[1] . The acquisition is discussed further in Note 2 - Acquisitions.

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

[3] The translation adjustments relate to the periodic translation of Canadian Dollar denominated goodwill recorded as a part of a prior Canadian acquisition as well as the periodic translation of the Canadian entity acquired with the purchase of KNAC