Information on Business Segments (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) Segment	Mar. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2
Net sales	$ 330,671	$ 376,692
Operating profit	49,313	50,649
Interest expense	4,324	5,113
Other expense (income), net	1,594	1,806
Income before income taxes	43,395	43,730
Aerospace [Member]
Segment Reporting Information [Line Items]
Net sales	131,571	134,190
Net sales	131,571	134,190
Operating profit	31,389	29,147
Industrial [Member]
Segment Reporting Information [Line Items]
Net sales	199,100	242,502
Net sales	199,100	242,502
Operating profit	17,924	21,502
Intersegment sales [Member]
Segment Reporting Information [Line Items]
Net sales	$ 0	$ 0