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%

Basis Of Presentation And Principles Of Consolidation [Line Items]

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Percentage of ownership by parent in net income loss.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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-Name Accounting Standards Codification
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The fair value of notes issued in noncash investing and financing activities.

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