Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2014		Jun. 30, 2014
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	$ 219
Goodwill, Acquired During Period	3,054	[1]
Goodwill			94,837
Cumulative impairment loss			(25,000)	[2]
Goodwill	72,212
Goodwill [Roll Forward]
Net balance at June 30, 2014	69,837
Translation adjustment	(898)	[3]
Net balance at December 31, 2014	72,212
Electrical Infrastructure [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	164
Goodwill, Acquired During Period	0	[1]
Goodwill			60,896
Cumulative impairment loss			(17,653)	[2]
Goodwill	42,886
Goodwill [Roll Forward]
Net balance at June 30, 2014	43,243
Translation adjustment	(521)	[3]
Net balance at December 31, 2014	42,886
Oil Gas & Chemical [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	3,054	[1]
Goodwill			13,943
Cumulative impairment loss			(3,000)	[2]
Goodwill	13,997
Goodwill [Roll Forward]
Net balance at June 30, 2014	10,943
Translation adjustment	0	[3]
Net balance at December 31, 2014	13,997
Storage Solutions [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period	0	[1]
Goodwill			10,949
Cumulative impairment loss			(922)	[2]
Goodwill	9,824
Goodwill [Roll Forward]
Net balance at June 30, 2014	10,027
Translation adjustment	(203)	[3]
Net balance at December 31, 2014	9,824
Industrial [Member]
Goodwill [Line Items]
Goodwill, Purchase Accounting Adjustments	55
Goodwill, Acquired During Period	0	[1]
Goodwill			9,049
Cumulative impairment loss			(3,425)	[2]
Goodwill	5,505
Goodwill [Roll Forward]
Net balance at June 30, 2014	5,624
Translation adjustment	(174)	[3]
Net balance at December 31, 2014	$ 5,505

[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