Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 232,442	$ 211,999	$ 689,322	$ 673,753
Cost of goods sold	140,400	124,697	407,006	393,999
Gross profit	92,042	87,302	282,316	279,754
Selling, general, and administrative expenses	37,696	39,518	116,899	118,167
Technical and research expenses	9,673	8,301	28,916	26,304
Restructuring expenses, net	187	710	230	4,189
Operating income	44,486	38,773	136,271	131,094
Interest expense, net	3,734	2,242	11,521	10,042
Aviation Manufacturing Jobs Protection (AMJP) grant	(5,832)	0	(5,832)	0
Other expense/(income), net	2,753	(2,745)	4,215	13,915
Income before income taxes	43,831	39,276	126,367	107,137
Income tax expense	12,889	9,686	36,375	37,504
Net income	30,942	29,590	89,992	69,633
Net income/(loss) attributable to the noncontrolling interest	80	1	150	(1,419)
Net income attributable to the Company	$ 30,862	$ 29,589	$ 89,842	$ 71,052
Basic earnings per share (in dollars per share)	$ 0.95	$ 0.92	$ 2.78	$ 2.20
Diluted earnings per share (in dollars per share)	$ 0.95	$ 0.91	$ 2.77	$ 2.20
Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]
Weighted average number of shares used in calculating basic net income per share (in shares)	32,381	32,337	32,369	32,326
Weighted average number of shares used in calculating diluted net income per share (in shares)	32,434	32,344	32,424	32,333
Dividends declared per share, Class A and Class B (in dollars per share)	$ 0.20	$ 0.19	$ 0.60	$ 0.57