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Condensed Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Oct. 01, 2016 | Sep. 30, 2017 | Oct. 01, 2016
Income Statement [Abstract] |  |  |  |
Net sales | $ 5,170,117 | $ 4,290,236 | $ 15,160,065 | $ 12,251,584
Costs, expenses and other: |  |  |  |
Cost of products sold | 4,591,153 | 3,608,000 | 13,111,226 | 10,669,103
Marketing, administrative and other expenses | 172,792 | 169,223 | 519,429 | 440,679
Equity in earnings of unconsolidated affiliates | (7,743) | (14,168) | (29,801) | (30,232)
Interest expense, net | 43,310 | 43,009 | 131,495 | 128,415
Costs, expenses and other, total | 4,799,512 | 3,806,064 | 13,732,349 | 11,207,965
Earnings before income taxes and noncontrolling interests | 370,605 | 484,172 | 1,427,716 | 1,043,619
Provision for income taxes | 104,500 | 152,807 | 442,239 | 318,388
Net earnings | 266,105 | 331,365 | 985,477 | 725,231
Earnings attributable to noncontrolling interests | 11,255 | 25,918 | 50,680 | 88,599
Net earnings attributable to Nucor stockholders | $ 254,850 | $ 305,447 | $ 934,797 | $ 636,632
Net earnings per share: |  |  |  |
Basic | $ 0.79 | $ 0.95 | $ 2.91 | $ 1.99
Diluted | $ 0.79 | $ 0.95 | $ 2.90 | $ 1.99
Average shares outstanding: |  |  |  |
Basic | 320,096 | 319,737 | 320,253 | 319,444
Diluted | 320,763 | 320,028 | 321,045 | 319,632
Dividends declared per share | $ 0.3775 | $ 0.3750 | $ 1.1325 | $ 1.1250

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