Condensed Consolidated Statements of Earnings and Comprehensive 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	$ 396,738	$ 364,304	$ 1,154,661	$ 974,048
Cost of sales	198,706	191,061	597,901	521,339
Gross profit	198,032	173,243	556,760	452,709
Operating expenses:
Research and development and other engineering	14,562	12,287	43,321	37,860
Selling	35,063	29,396	99,053	84,757
General and administrative	47,792	40,289	143,767	117,396
Total operating expenses	97,417	81,972	286,141	240,013
Net gain on disposal of assets	(4)	(72)	(112)	(209)
Income from operations	100,619	91,343	270,731	212,905
Interest expense, net and other	(846)	(518)	(5,259)	(3,202)
Income before taxes	99,773	90,825	265,472	209,703
Provision for income taxes	25,995	23,768	68,822	52,341
Net income	73,778	67,057	196,650	157,362
Other comprehensive income
Translation adjustment	(4,889)	6,238	(6,649)	3,170
Unamortized pension adjustments	(182)	28	209	88
Unrealized Gain (Loss) on Derivatives	(153)	0	(134)	0
Comprehensive net income	$ 68,554	$ 73,323	$ 190,076	$ 160,620
Net income per common share:
Basic	$ 1.70	$ 1.54	$ 4.54	$ 3.60
Diluted	$ 1.70	$ 1.54	$ 4.52	$ 3.59
Number of shares outstanding
Basic	43,276	43,474	43,287	43,683
Diluted	43,485	43,683	43,500	43,873
Cash dividends declared per common share	$ 0.25	$ 0.23	$ 0.73	$ 0.69

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use; (3) to conduct internal product testing; (4) or to provide engineering support to customers in the form of testing services or product uses, specifications or requirements.

No definition available.