Business Segment Information - Intra-Segment and Inter-Segment Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net sales	$ 92,436	$ 71,892
Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	56,975	42,057
Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	35,461	29,835
Intra-Segment Sales [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales		(45)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	98,742	77,409
Operating Segments [Member] | Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	61,600	44,476
Operating Segments [Member] | Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	37,142	32,933
Inter-Segment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales	(6,183)	(5,148)
Inter-Segment Elimination [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(67)
Inter-Segment Elimination [Member] | Energy Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(56)	(324)
Inter-Segment Elimination [Member] | Engineered Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	(4,558)	(2,374)
Inter-Segment Elimination [Member] | Engineered Systems Segment [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(67)	(45)
Inter-Segment Elimination [Member] | Industrial Process Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	(1,625)	(2,774)
Inter-Segment Elimination [Member] | Industrial Process Solutions Segment [Member] | Energy Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ (56)	$ (324)