Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 219,867	$ 199,523
Cost of sales	119,711	107,000
Gross profit	100,156	92,523
Operating expenses:
Research and development and other engineering	13,108	11,423
Selling	29,483	25,187
General and administrative	34,986	29,298
Net gain on disposal of assets	(51)	(26)
Total operating expenses	77,526	65,882
Income from operations	22,630	26,641
Loss in equity method investment, before tax	(28)	0
Interest expense, net	(189)	(235)
Gain on bargain purchase of a business	8,388	0
Income before taxes	30,801	26,406
Provision for income taxes	7,680	10,063
Net income	$ 23,121	$ 16,343
Earnings per common share:
Basic (in dollars per share)	$ 0.49	$ 0.34
Diluted (in dollars per share)	$ 0.48	$ 0.34
Number of shares outstanding
Basic (in shares)	47,616	48,297
Diluted (in shares)	47,906	48,450
Cash dividends declared per common share (in dollars per share)	$ 0.18	$ 0.16

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.