Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 259,244	$ 244,779
Cost of sales	148,990	137,157
Gross profit	110,254	107,622
Operating expenses:
Research and development and other engineering	12,260	11,150
Selling	28,112	27,573
General and administrative	39,549	37,399
Total operating expenses	79,921	76,122
Net loss (gain) on disposal of assets	310	(1,184)
Income from operations	30,023	32,684
Foreign exchange gain (loss) and other	(567)	88
Interest expense, net	(196)	(90)
Income before taxes	29,260	32,682
Provision for income taxes	6,598	7,253
Net income	22,662	25,429
Translation adjustment	(1,335)	3,860
Comprehensive net income	$ 21,327	$ 29,289
Earnings per common share:
Basic	$ 0.51	$ 0.55
Diluted	$ 0.50	$ 0.54
Number of shares outstanding
Basic	44,874	46,615
Diluted	45,213	47,009
Cash dividends declared per common share (in dollars per share)	$ 0.22	$ 0.21

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.