Information on Business Segments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) Segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2
Net sales	$ 301,629	$ 330,671
Operating profit	32,380	49,313
Interest expense	3,942	4,324
Other expense (income), net	1,463	1,594
Income before income taxes	26,975	43,395
Industrial
Segment Reporting Information [Line Items]
Net sales	219,987	199,100
Aerospace
Segment Reporting Information [Line Items]
Net sales	81,642	131,571
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Net sales	219,992	199,100
Operating profit	21,295	17,924
Operating Segments | Aerospace
Segment Reporting Information [Line Items]
Net sales	81,642	131,571
Operating profit	11,085	31,389
Intersegment sales
Segment Reporting Information [Line Items]
Net sales	$ (5)	$ 0