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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. 27, 2014 | Sep. 28, 2013 | Sep. 27, 2014 | Sep. 28, 2013
CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) [Abstract] |  |  |  |  |  |  |  |
Net sales | $ 602,820 |  | $ 528,854 |  | $ 1,826,885 |  | $ 1,670,826 |
Cost of goods sold | 521,278 |  | 456,302 |  | 1,574,830 |  | 1,440,277 |
Depreciation and amortization | 8,952 |  | 7,882 |  | 25,651 |  | 24,364 |
Selling, general, and administrative expense | 34,864 |  | 32,921 |  | 102,167 |  | 99,078 |
Gain on sale of plastic fittings manufacturing assets | 0 |  | (39,765) |  | 0 |  | (39,765) |
Impairment charges | 0 |  | 4,304 |  | 0 |  | 4,304 |
Insurance settlements | 0 |  | 0 |  | 0 |  | (106,332) |
Operating income | 37,726 |  | 67,210 |  | 124,237 |  | 248,900 |
Interest expense | (1,430) |  | (1,243) |  | (3,913) |  | (2,940) |
Other income, net | 225 |  | 842 |  | 440 |  | 4,324 |
Income before income taxes | 36,521 |  | 66,809 |  | 120,764 |  | 250,284 |
Income tax expense | (12,199) |  | (26,816) |  | (36,279) |  | (92,015) |
Consolidated net income | 24,322 |  | 39,993 |  | 84,485 |  | 158,269 |
Net income attributable to noncontrolling interest | (499) |  | (129) |  | (911) |  | (1,053) |
Net income attributable to Mueller Industries, Inc. | $ 23,823 |  | $ 39,864 |  | $ 83,574 |  | $ 157,216 |
Weighted average shares for basic earnings per share (in shares) | 56,107 | [1] | 55,787 | [1] | 55,999 | [1] | 55,704 | [1]
Effect of dilutive stock-based awards (in shares) | 637 | [1] | 723 | [1] | 746 | [1] | 737 | [1]
Adjusted weighted average shares for diluted earnings per share (in shares) | 56,744 | [1] | 56,510 | [1] | 56,745 | [1] | 56,441 | [1]
Basic earnings per share (in dollars per share) | $ 0.42 | [1] | $ 0.71 | [1] | $ 1.49 | [1] | $ 2.82 | [1]
Diluted earnings per share (in dollars per share) | $ 0.42 | [1] | $ 0.71 | [1] | $ 1.47 | [1] | $ 2.79 | [1]
Dividends per share (in dollars per share) | $ 0.075 | [1] | $ 0.0625 | [1] | $ 0.225 | [1] | $ 0.1875 | [1]
[1] | Adjusted retroactively to reflect the two-for-one stock split that occurred on March 14, 2014.

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