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Acquisitions (Details) (USD $) | 3 Months Ended |  | 0 Months Ended |  | 0 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Jun. 30, 2014 | Aug. 23, 2014 HDB, Inc. [Member] | Aug. 22, 2014 HDB, Inc. [Member] | Dec. 21, 2013 Kvaerner NAC | Sep. 30, 2014 Kvaerner NAC
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business Acquisition, Name of Acquired Entity |  |  |  | HDB Ltd. Limited Partnership ("HDB"). |  | Kvaerner North American Construction Ltd. and substantially all of the assets of Kvaerner North American Construction Inc |
Current assets |  |  |  |  | $ 1,658,000 | $ 83,575,000 |
Property, plant and equipment |  |  |  |  | 1,162,000 | 11,377,000 |
Goodwill | 72,065,000 |  | 69,837,000 |  |  | 39,232,000 |
Other intangible assets |  |  |  |  | 900,000 | 24,009,000 |
Total assets acquired |  |  |  |  | 6,306,000 | 158,193,000 |
Current liabilities |  |  |  |  | 1,056,000 | 68,115,000 |
Deferred income taxes |  |  |  |  |  | 1,116,000 |
Noncontrolling interest of consolidated joint venture |  |  |  |  |  | 700,000 | 500,000
Net assets acquired |  |  |  |  | 5,250,000 | 88,262,000 |
Cash acquired |  |  |  |  |  | 36,655,000 |
Net purchase price | 5,250,000 | 0 |  |  |  | 51,607,000 |
Business Acquisition, Goodwill, Expected Tax Deductible Amount |  |  |  |  | 2,586,000 | 28,500,000 |
Business Combination, Consideration Transferred |  |  |  | $ 5,250,000 |  | $ 88,300,000 |

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