Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Property and equipment additions		$ 1,591	$ 934	$ 5,511	$ 2,367
Depreciation and amortization		3,119	2,941	8,769	7,609
Identifiable assets		600,057		600,057		$ 504,721
Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		392	96	1,081	128
Depreciation and amortization		1,462	1,398	3,948	3,253
Identifiable assets		420,665		420,665		332,820
Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		570	330	2,281	743
Depreciation and amortization		1,109	1,153	3,217	3,212
Identifiable assets		159,763		159,763		150,458
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Property and equipment additions		629	508	2,149	1,496
Depreciation and amortization		548	$ 390	1,604	$ 1,144
Identifiable assets	[1]	$ 19,629		$ 19,629		$ 21,443

[1] Corporate and Other assets consist primarily of cash and income tax related assets.