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Intangible Assets Including Goodwill - Carrying Value of Goodwill By Segment (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Dec. 31, 2013
Jun. 30, 2013
Goodwill [Line Items]    
Goodwill, Acquired During Period $ 36,311 [1]  
Goodwill   55,836
Cumulative impairment loss   (25,000) [2]
Goodwill 67,122  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 30,836  
Translation adjustment (25)  
Net balance at December 31, 2013 67,122  
Electrical Infrastructure [Member]
    
Goodwill [Line Items]    
Goodwill, Acquired During Period 0 [1]  
Goodwill   29,666
Cumulative impairment loss   (17,653) [2]
Goodwill 12,013  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 12,013  
Translation adjustment 0  
Net balance at December 31, 2013 12,013  
Oil Gas & Chemical [Member]
    
Goodwill [Line Items]    
Goodwill, Acquired During Period 0 [1]  
Goodwill   8,088
Cumulative impairment loss   (3,000) [2]
Goodwill 5,088  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 5,088  
Translation adjustment 0  
Net balance at December 31, 2013 5,088  
Storage Solutions [Member]
    
Goodwill [Line Items]    
Goodwill, Acquired During Period 0 [1]  
Goodwill   10,985
Cumulative impairment loss   (922) [2]
Goodwill 10,038  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 10,063  
Translation adjustment (25) [1]  
Net balance at December 31, 2013 10,038  
Industrial [Member]
    
Goodwill [Line Items]    
Goodwill, Acquired During Period    [1]  
Goodwill   7,097
Cumulative impairment loss   (3,425) [2]
Goodwill 3,672  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 3,672  
Translation adjustment 0  
Net balance at December 31, 2013 3,672  
Other Segments [Member]
    
Goodwill [Line Items]    
Goodwill, Acquired During Period 36,311 [1]  
Goodwill   0
Cumulative impairment loss   0 [2]
Goodwill 36,311  
Goodwill [Roll Forward]    
Net balance at June 30, 2013 0  
Translation adjustment 0  
Net balance at December 31, 2013 $ 36,311  
[1] (B)
[2] A $25.0 million impairment charge was recorded in February 2005 as a result of the Company’s operating performance in fiscal 2005.