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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 28, 2013 | Sep. 29, 2012 | Sep. 28, 2013 | Sep. 29, 2012
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract] |  |  |  |
Net sales | $ 528,854 | $ 514,165 | $ 1,670,826 | $ 1,685,932
Cost of goods sold | 456,302 | 449,718 | 1,440,277 | 1,465,744
Depreciation and amortization | 7,882 | 7,870 | 24,364 | 23,318
Selling, general, and administrative expense | 32,921 | 32,120 | 99,078 | 97,209
Gain on sale of plastic fittings manufacturing assets | (39,765) | 0 | (39,765) | 0
Impairment charges | 4,304 | 0 | 4,304 | 0
Insurance settlement | 0 | 0 | (106,332) | (1,500)
Operating income | 67,210 | 24,457 | 248,900 | 101,161
Interest expense | (1,243) | (353) | (2,940) | (5,711)
Other income, net | 842 | 219 | 4,324 | 963
Income before income taxes | 66,809 | 24,323 | 250,284 | 96,413
Income tax expense | (26,816) | (8,753) | (92,015) | (29,486)
Consolidated net income | 39,993 | 15,570 | 158,269 | 66,927
Net income attributable to noncontrolling interest | (129) | (59) | (1,053) | (900)
Net income attributable to Mueller Industries, Inc. | $ 39,864 | $ 15,511 | $ 157,216 | $ 66,027
Weighted average shares for basic earnings per share (in shares) | 27,894 | 37,505 | 27,852 | 37,849
Effect of dilutive stock-based awards (in shares) | 361 | 452 | 369 | 444
Adjusted weighted average shares for diluted earnings per share (in shares) | 28,255 | 37,957 | 28,221 | 38,293
Basic earnings per share (in dollars per share) | $ 1.43 | $ 0.41 | $ 5.64 | $ 1.74
Diluted earnings per share (in dollars per share) | $ 1.41 | $ 0.41 | $ 5.57 | $ 1.72
Dividends per share (in dollars per share) | $ 0.125 | $ 0.10 | $ 0.375 | $ 0.30

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