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Business Segment Information - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) Segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016
Segment Reporting Information [Line Items]
Sales outside country, percentage	33.00%	32.00%	37.00%
Europe [Member]
Segment Reporting Information [Line Items]
Sales outside country, percentage	11.00%
Long lived assets located outside country	$ 14.5
Asia [Member]
Segment Reporting Information [Line Items]
Sales outside country, percentage	11.50%
Middle East and Africa [Member]
Segment Reporting Information [Line Items]
Sales outside country, percentage	6.20%
Outside United States [Member]
Segment Reporting Information [Line Items]
Long lived assets located outside country	$ 19.1	$ 29.7
Net Sales [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Major customer	10.00%	10.00%	10.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Major customer	10.00%	10.00%	10.00%
CECO Group, Inc. [Member]
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	3

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Entity Wide Disclosure On Geographic Sales In Foreign Countries Percentage

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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