Business Segment Information - Intra-Segment and Inter-Segment Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Net sales	$ 75,170	$ 81,179	$ 155,656	$ 167,190
Energy Inter Segment Sales
Segment Reporting Information [Line Items]
Net sales			(791)	(1,558)
Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales			(254)	(65)
Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	49,074	50,572	99,720	105,760
Energy Solutions Segment [Member] | Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales			(239)	(12)
Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	16,664	20,083	37,020	38,936
Industrial Solutions Segment [Member] | Energy Inter Segment Sales
Segment Reporting Information [Line Items]
Net sales			(791)	(1,558)
Industrial Solutions Segment [Member] | Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales			(15)	(53)
Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	9,432	10,524	18,916	22,494
Intra - Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(6,912)	(3,113)	(15,362)	(6,575)
Intra - Segment Sales [Member] | Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	(2,984)	(973)	(7,790)	(1,864)
Intra - Segment Sales [Member] | Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	(3,738)	(1,800)	(7,124)	(3,977)
Intra - Segment Sales [Member] | Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	(190)	(340)	(448)	(734)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	82,807	85,308	172,306	175,696
Operating Segments [Member] | Energy Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	52,369	51,656	107,978	107,806
Operating Segments [Member] | Industrial Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	20,809	22,702	44,950	44,524
Operating Segments [Member] | Fluid Handling Solutions Segment [Member]
Segment Reporting Information [Line Items]
Net sales	9,629	10,950	19,378	23,366
Inter-segment Elimination [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(113)	(197)	(243)	(308)
Inter-segment Elimination [Member] | Energy Inter Segment Sales
Segment Reporting Information [Line Items]
Net sales	(407)	(812)
Inter-segment Elimination [Member] | Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(205)	(7)
Inter-segment Elimination [Member] | Energy Solutions Segment [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(106)	(111)	(229)	(170)
Inter-segment Elimination [Member] | Energy Solutions Segment [Member] | Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	(205)
Inter-segment Elimination [Member] | Industrial Solutions Segment [Member] | Energy Inter Segment Sales
Segment Reporting Information [Line Items]
Net sales	(407)	(812)
Inter-segment Elimination [Member] | Industrial Solutions Segment [Member] | Fluid Handling Filtration Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales		(7)
Inter-segment Elimination [Member] | Fluid Handling Solutions Segment [Member] | Industrial Inter-Segment Sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ (7)	$ (86)	$ (14)	$ (138)