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Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Sep. 30, 2013
Jun. 30, 2013
Goodwill [Line Items]    
Goodwill   $ 55,836
Cumulative impairment loss   (25,000) [1]
Goodwill 30,887  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 30,836  
Translation adjustment 51  
Net balance at September 30, 2013 30,887  
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, 2013 12,013  
Translation adjustment 0  
Net balance at September 30, 2013 12,013  
Oil Gas & Chemical [Member]
    
Goodwill [Line Items]    
Goodwill   8,088
Cumulative impairment loss   (3,000) [1]
Goodwill 5,088  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 5,088  
Translation adjustment 0  
Net balance at September 30, 2013 5,088  
Storage Solutions [Member]
    
Goodwill [Line Items]    
Goodwill   10,985
Cumulative impairment loss   (922) [1]
Goodwill 10,114  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 10,063  
Translation adjustment 51 [2]  
Net balance at September 30, 2013 10,114  
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, 2013 3,672  
Translation adjustment 0  
Net balance at September 30, 2013 $ 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.
[2] (B)The translation adjustment relates to the periodic translation of Canadian Dollar denominated goodwill recorded as a part of a prior Canadian acquisition.