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Segment Information (Details Textual) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2010
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  |  | 10.00% | 10.00%
No Customer accounted for consolidated revenue |  |  | greater than 10% | greater than 10%
Segment Information (Textual) [Abstract] |  |  |  |
Net earnings included in income tax charges | $ 3.1 | $ 3.1 |  |
Income tax adjustment amount for prior fiscal years |  |  | 2.1 |
Income tax adjustment amount related to current year |  | 1.0 |  |
Income tax adjustment amount related to fourth quarter | $ 0.2 |  |  |
Customer One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 11.00% |  |
Customer Two [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 10.70% |  |
Electrical Infrastructure [Member] | Customer One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 18.60% | 34.90% | 52.80%
Electrical Infrastructure [Member] | Customer Two [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 11.80% | 20.30% |
Electrical Infrastructure [Member] | Customer Three [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 11.20% | 11.50% |
Oil Gas & Chemical [Member] | Customer One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 35.10% |  | 30.20%
Oil Gas & Chemical [Member] | Customer Two [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  |  |  | 11.10%
Oil Gas & Chemical [Member] | Another Customer [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  |  | 38.40% |
Storage Solutions [Member] | Customer One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  |  | 13.20% | 10.90%
Storage Solutions [Member] | Customer Two [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  |  | 13.10% |
Storage Solutions [Member] | Customer Three [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  |  | 12.30% |
Storage Solutions [Member] | Customer Four [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  |  | 11.40% |
Storage Solutions [Member] | Another Customer [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 20.90% |  |
Industrial [Member] | Customer One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 25.70% | 31.90% | 29.90%
Industrial [Member] | Customer Two [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 18.10% | 21.80% | 14.40%
Industrial [Member] | Customer Three [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 15.30% | 16.70% | 12.30%
Industrial [Member] | Customer Four [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of Revenue |  | 12.20% |  |

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