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Business Segment Information - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2020
USD ($)
Segment
Dec. 31, 2019
USD ($)
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Sales outside country, percentage 35.00% 30.00% 33.00%
Europe [Member]      
Segment Reporting Information [Line Items]      
Sales outside country, percentage 11.70%    
Long lived assets located outside country $ 25.4    
Asia [Member]      
Segment Reporting Information [Line Items]      
Sales outside country, percentage 11.40%    
Outside United States [Member]      
Segment Reporting Information [Line Items]      
Long lived assets located outside country $ 29.0 $ 16.9  
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