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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Income Statement [Abstract] |  |  |  |
Net sales revenue | $ 89,366 | $ 81,247 | $ 171,768 | $ 165,125
Cost of sales | (23,078) | (21,068) | (45,098) | (42,949)
Gross profit | 66,288 | 60,179 | 126,670 | 122,176
Operating expenses: |  |  |  |
Volume incentives | 30,791 | 29,603 | 60,668 | 59,940
Selling, general and administrative | 31,249 | 27,392 | 59,634 | 53,722
Operating income | 4,248 | 3,184 | 6,368 | 8,514
Other income (loss), net | (622) | (2) | 937 | (320)
Income before provision for income taxes | 3,626 | 3,182 | 7,305 | 8,194
Provision for income taxes | 1,260 | 787 | 3,150 | 1,596
Net income from continuing operations | 2,366 | 2,395 | 4,155 | 6,598
Income from discontinued operations | 0 | 0 | 0 | 1,312
Net income | 2,366 | 2,395 | 4,155 | 7,910
Net loss attributable to noncontrolling interests | (202) | (166) | (482) | (318)
Net income attributable to common shareholders | $ 2,568 | $ 2,561 | $ 4,637 | $ 8,228
Basic earnings per share attributable to common shareholders: |  |  |  |
Net income from continuing operations (in dollars per share) | $ 0.14 | $ 0.13 | $ 0.25 | $ 0.35
Income (loss) from discontinued operations (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.07
Net income attributable to common shareholders (in dollars per share) | 0.14 | 0.14 | 0.25 | 0.44
Diluted earnings per share attributable to common shareholders: |  |  |  |
Net income from continuing operations (in dollars per share) | 0.14 | 0.12 | 0.24 | 0.34
Income (loss) from discontinued operations (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.07
Net income attributable to common shareholders (in dollars per share) | $ 0.14 | $ 0.13 | $ 0.24 | $ 0.43
Weighted average basic common shares outstanding (in shares) | 18,723 | 18,720 | 18,708 | 18,671
Weighted average diluted common shares outstanding (in shares) | 18,940 | 19,244 | 18,946 | 19,157
Dividends declared per common share (in dollars per share) | $ 0.10 | $ 0.10 | $ 0.2 | $ 0.2

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