Information on Business Segments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) Segment	Jun. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			2
Net sales	$ 321,158	$ 235,537	$ 622,787	$ 566,207
Operating profit (loss)	38,543	10,115	70,923	59,429
Interest expense	4,475	3,898	8,416	8,223
Other expense (income), net	1,272	1,060	2,734	2,654
Income before income taxes	32,796	5,157	59,773	48,552
Industrial
Segment Reporting Information [Line Items]
Net sales	234,673	165,029	454,660	364,128
Aerospace
Segment Reporting Information [Line Items]
Net sales	86,485	70,508	168,127	202,079
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Net sales	234,679	165,031	454,671	364,131
Operating profit (loss)	27,273	(300)	48,568	17,625
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Net sales	86,485	70,508	168,127	202,079
Operating profit (loss)	11,270	10,415	22,355	41,804
Intersegment sales
Segment Reporting Information [Line Items]
Net sales	$ (6)	$ (2)	$ (11)	$ (3)