Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Property and equipment additions		$ 3,376	$ 2,616	$ 3,945
Depreciation and amortization		10,614	9,853	9,921
Identifiable assets		504,721	416,197
Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		203	100	550
Depreciation and amortization		4,672	4,249	4,957
Identifiable assets		332,820	262,558
Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		879	721	1,349
Depreciation and amortization		4,388	4,299	4,199
Identifiable assets		150,458	141,975
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		2,294	1,795	2,046
Depreciation and amortization		1,554	1,305	$ 765
Identifiable assets	[1]	$ 21,443	$ 11,664

[1] Corporate assets primarily consist of cash, property, plant and equipment, and income tax related assets.