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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenues: |  |  |
Products | $ 318,946 | $ 306,252 | $ 317,900
Services | 652,040 | 623,783 | 573,033
Cloud | 361,166 | 85,507 | 35,934
Total revenues | 1,332,152 | 1,015,542 | 926,867
Cost of revenues: |  |  |
Products | 51,065 | 53,032 | 66,363
Services | 225,020 | 250,022 | 222,784
Cloud | 192,588 | 34,679 | 14,435
Total cost of revenues | 468,673 | 337,733 | 303,582
Gross profit | 863,479 | 677,809 | 623,285
Operating expenses: |  |  |
Research and development, net | 181,107 | 141,528 | 128,485
Selling and marketing | 361,328 | 268,349 | 225,817
General and administrative | 129,071 | 116,569 | 90,349
Amortization of acquired intangibles | 41,902 | 17,187 | 12,528
Total operating expenses | 713,408 | 543,633 | 457,179
Operating income | 150,071 | 134,176 | 166,106
Financial income (expenses) and other, net | (20,411) | 10,305 | 5,304
Income before taxes on income | 129,660 | 144,481 | 171,410
Taxes on income (tax benefit) | (13,631) | 21,412 | 30,832
Net income from continuing operations | 143,291 | 123,069 | 140,578
Discontinued operations: |  |  |
Gain on disposal and income (loss) from operations |  | (8,235) | 152,459
Taxes on income (tax benefit) |  | (2,086) | 34,206
Net income (loss) on discontinued operations |  | (6,149) | 118,253
Net income | $ 143,291 | $ 116,920 | $ 258,831
Basic earnings per share from continuing operations | $ 2.37 | $ 2.06 | $ 2.36
Basic earnings per share from discontinued operations |  | (0.10) | 1.99
Basic earnings per share | 2.37 | 1.96 | 4.35
Diluted earnings per share from continuing operations | 2.31 | 2.02 | 2.29
Diluted earnings per share from discontinued operations |  | (0.10) | 1.93
Diluted earnings per share | $ 2.31 | $ 1.92 | $ 4.22
Weighted average number of shares used in computing: |  |  |
Basic earnings per share | 60,444 | 59,667 | 59,552
Diluted earnings per share | 62,119 | 61,035 | 61,281

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- Definition 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; or (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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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