Acquisitions (Details Textual) - USD ($)
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12 Months Ended |
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Jun. 30, 2014 |
Mar. 29, 2013 |
Feb. 29, 2016 |
Feb. 28, 2015 |
Feb. 28, 2014 |
Jun. 02, 2012 |
| Business Acquisition [Line Items] |
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| Liabilities assumed |
$ 300,000
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| Goodwill |
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$ 292,527,000
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$ 279,074,000
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$ 278,556,000
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| Purchase price of acquisition, net of cash |
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60,584,000
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11,518,000
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$ 275,702,000
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| Zalk Steel [Member] |
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| Business Acquisition [Line Items] |
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| Goodwill |
3,300,000
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| Purchase price of acquisition |
10,500,000
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| Intangible assets acquired |
$ 3,400,000
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| Aquilex [Member] |
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| Business Acquisition [Line Items] |
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| Assets acquired |
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$ 303,229,000
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| Goodwill |
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109,636,000
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| Acquisition related costs |
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$ 5,400,000
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| Additional payment on performance |
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$ 3,900,000
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| Purchase price of acquisition |
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275,700,000
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| Business Acquisition Amount of Payment Due at Close under Purchase Agreement |
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$ 271,800,000
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| Intangible assets acquired |
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87,100,000
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| Nuclear Logistics Incorporated [Member] |
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| Business Acquisition [Line Items] |
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| Future contingent consideration |
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$ 9,100,000
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$ 20,000,000
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| Customer Relationships [Member] | Zalk Steel [Member] |
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| Business Acquisition [Line Items] |
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| Weighted average useful life |
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19 years
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| Customer Related Intangibles [Member] | Aquilex [Member] |
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| Business Acquisition [Line Items] |
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| Weighted average useful life |
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14 years
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| Trade Names [Member] | Zalk Steel [Member] |
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| Business Acquisition [Line Items] |
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| Weighted average useful life |
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19 years
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| Trade Names [Member] | Aquilex [Member] |
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| Business Acquisition [Line Items] |
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| Weighted average useful life |
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19 years
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| Noncompete Agreements [Member] | Zalk Steel [Member] |
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| Business Acquisition [Line Items] |
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| Weighted average useful life |
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5 years
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| Minimum [Member] | Technology [Member] | Aquilex [Member] |
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| Business Acquisition [Line Items] |
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| Weighted average useful life |
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3 years
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| Maximum [Member] | Technology [Member] | Aquilex [Member] |
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| Business Acquisition [Line Items] |
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| Weighted average useful life |
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9 years
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