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Basis of Reporting for Consolidated Financial Statements - Additional Information (Detail) - Peerless Propulsys [Member] - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Basis Of Presentation And Principles Of Consolidation [Line Items] |  |
Noncontrolling Interest, Ownership Percentage by Parent | 60.00% |
Percentage of ownership by parent in net income loss | 80.00% |
Promissory note issued in exchange for ownership in equity | $ 5.3 |
Promissory note due date | Jul. 11, 2019 |
CECO Group Global Holdings LLC |  | 100.00%

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