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Quarterly Financial Information (Unaudited) | 12 Months Ended
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Dec. 29, 2018
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information (Unaudited) | Quarterly Financial Information (Unaudited) (1)
(In thousands, except per share data) |  | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |
2018 |  |  |  |  |  |  |  |  |
Net sales |  | $ | 640,060 |  |  | $ | 662,773 |  |  | $ | 645,958 |  |  | $ | 559,087 |  |
Gross profit (2) |  | 94,390 |  |  | 98,953 |  |  | 79,002 |  |  | 85,133 |  |
Consolidated net income (3) |  | 24,344 |  |  | 33,882 |  |  | 20,863 |  |  | 27,731 |  |
Net income attributable to Mueller Industries, Inc. |  | 24,128 |  |  | 33,182 |  |  | 20,292 |  |  | 26,857 |  |
Basic earnings per share |  | 0.42 |  |  | 0.58 |  |  | 0.36 |  |  | 0.47 |  |
Diluted earnings per share |  | 0.42 |  |  | 0.58 |  |  | 0.35 |  |  | 0.47 |  |
Dividends per share |  | 0.10 |  |  | 0.10 |  |  | 0.10 |  |  | 0.10 |  |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ | 577,920 |  |  | $ | 614,266 |  |  | $ | 550,363 |  |  | $ | 523,524 |  |
Gross profit (2) |  | 89,493 |  |  | 89,955 |  |  | 79,101 |  |  | 66,907 |  |
Consolidated net income (4) |  | 30,455 |  |  | 27,833 |  |  | 22,754 |  |  | 5,969 |  | (5)
Net income attributable to Mueller Industries, Inc. |  | 29,987 |  |  | 27,633 |  |  | 22,258 |  |  | 5,720 |  |
Basic earnings per share |  | 0.53 |  |  | 0.49 |  |  | 0.39 |  |  | 0.10 |  |
Diluted earnings per share |  | 0.52 |  |  | 0.48 |  |  | 0.39 |  |  | 0.10 |  |
Dividends per share |  | 8.10 |  |  | 0.10 |  |  | 0.10 |  |  | 0.10 |  |
(1) | The sum of quarterly amounts may not equal the annual amounts reported due to rounding. In addition, the earnings per share amounts are computed independently for each quarter, while the full year is based on the weighted average shares outstanding.
(2) | Gross profit is net sales less cost of goods sold, which excludes depreciation and amortization.
(3) | Includes income earned by ATCO, acquired during Q3 2018, and Die-Mold, acquired during Q1 2018.
(4) | Includes income earned by Heatlink Group, acquired during Q2 2017.
(5) | Includes $1.1 million of pre-tax charges related to asset impairments, $4.3 million of interest expense on the Company’s Subordinated Debentures, and pre-tax environmental expense for non-operating properties of $6.2 million.

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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