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Basis of Reporting for Consolidated Financial Statements - Additional Information (Detail) - Acquisition | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2015 | Dec. 31, 2014
Basis Of Presentation And Principles Of Consolidation [Line Items] |  |  |
Number of acquisitions | 1 |  | 4
Peerless Propulsys [Member] |  |  |
Basis Of Presentation And Principles Of Consolidation [Line Items] |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 60.00% | 60.00% |
Percentage of ownership by parent in net income loss |  | 80.00% |

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- Details
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