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Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Oct. 01, 2016 | Jul. 02, 2016 | Apr. 02, 2016 | Dec. 26, 2015 | Sep. 26, 2015 | Jun. 27, 2015 | Mar. 28, 2015 | Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Quarterly Financial Information (Unaudited) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | [1] | $ 472,158 |  | $ 506,584 |  | $ 544,071 |  | $ 532,809 |  | $ 471,983 |  | $ 535,184 |  | $ 555,593 |  | $ 537,242 |  |  |  |
Gross profit | [1],[2] | 76,029 |  | 81,916 |  | 88,011 |  | 86,167 |  | 60,647 |  | 68,017 |  | 85,228 |  | 76,408 |  |  |  |
Consolidated net income |  | 16,768 | [1],[3],[4] | 26,062 | [1],[4],[5] | 28,259 | [1],[4] | 28,665 | [1],[4] | 14,110 | [1],[6] | 18,095 | [1],[6],[7] | 33,862 | [1],[6],[8] | 22,340 | [1],[6] | $ 99,754 | $ 88,407 | $ 102,534
Net income attributable to Mueller Industries, Inc. |  | $ 17,322 | [1] | $ 25,978 | [1] | $ 27,797 | [1] | $ 28,630 | [1] | $ 14,435 | [1] | $ 17,800 | [1] | $ 33,651 | [1] | $ 21,978 | [1] | $ 99,727 | $ 87,864 | $ 101,560
Basic earnings per share (in dollars per share) |  | $ 0.31 | [1] | $ 0.46 | [1] | $ 0.49 | [1] | $ 0.51 | [1] | $ 0.26 | [1] | $ 0.32 | [1] | $ 0.60 | [1] | $ 0.39 | [1] | $ 1.76 | $ 1.56 | $ 1.81
Diluted earnings per share (in dollars per share) |  | 0.30 | [1] | 0.45 | [1] | 0.49 | [1] | 0.50 | [1] | 0.25 | [1] | 0.31 | [1] | 0.59 | [1] | 0.39 | [1] | 1.74 | 1.54 | 1.79
Dividends per share (in dollars per share) |  | $ 0.100 | [1] | $ 0.100 | [1] | $ 0.100 | [1] | $ 0.075 | [1] | $ 0.075 | [1] | $ 0.075 | [1] | $ 0.075 | [1] | $ 0.075 | [1] | $ 0.375 | $ 0.300 | $ 0.300
Gain on sale of manufacturing assets |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 15,400 |  |  |  | $ 0 | $ 15,376 | $ 6,259
Pre-tax impairment charge |  | $ 3,800 |  | $ 3,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,778 | 0 | 0
Pre-tax charges related to severance |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,400 |  |  |  | $ 0 | $ 3,442 | $ 7,296
Permanent adjustment to deferred tax liability |  |  |  |  |  |  |  |  |  |  |  | $ 4,200 |  |  |  |  |  |  |  |
[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 $3.8 million of pre-tax charges related to asset impairments.
[4] | Includes income earned by Jungwoo-Mueller, acquired during Q2 2016.
[5] | Includes $3.0 million of pre-tax charges related to asset impairments.
[6] | Includes income earned by Turbotec, acquired during Q2 2015, Sherwood, acquired during Q2 2015, and Great Lakes, acquired during Q3 2015.
[7] | During Q3 2015, the Company recorded a permanent adjustment to a deferred tax liability of $4.2 million.
[8] | Includes $15.4 million pre-tax gain on sale of assets and $3.4 million of pre-tax charges related to severance.

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