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CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Apr. 01, 2017
Income Statement [Abstract] |  |  |  |
Net sales |  | $ 640,060 | $ 577,920 | [1]
Cost of goods sold |  | 545,670 | 488,427 | [1]
Depreciation and amortization |  | 9,456 | 8,355 | [1]
Selling, general, and administrative expense |  | 34,057 | 35,574 | [1]
Asset impairment |  | 3,469 | 0 | [2]
Operating income |  | 47,408 | 45,564 | [1]
Interest expense |  | (5,909) | (2,531) | [1]
Other income, net |  | 560 | 594 | [1]
Income before income taxes |  | 42,059 | 43,627 | [1]
Income tax expense |  | (7,395) | (11,929) | [1]
Loss from unconsolidated affiliates, net of foreign tax |  | (10,320) | (1,243) | [1],[2]
Consolidated net income | [1] | 24,344 | 30,455 | [2]
Net income attributable to noncontrolling interests |  | (216) | (468) | [1]
Net income attributable to Mueller Industries, Inc. |  | $ 24,128 | $ 29,987 | [1]
Weighted average shares for basic earnings per share (in shares) |  | 56,900 | 56,780 | [1]
Effect of dilutive stock-based awards (in shares) |  | 517 | 658 | [1]
Adjusted weighted average shares for diluted earnings per share (in shares) |  | 57,417 | 57,438 | [1]
Basic earnings per share (in dollars per share) |  | $ 0.42 | $ 0.53 | [1]
Diluted earnings per share (in dollars per share) |  | 0.42 | 0.52 | [1]
Dividends per share (in dollars per share) |  | $ 0.1 | $ 8.1 | [1]
[1] | The Condensed Consolidated Statement of Income for the quarter ended April 1, 2017 has been adjusted to reflect the adoption of ASU 2017-07, Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The components of net periodic benefit cost (income) other than the service cost component are included in other income, net in the Condensed Consolidated Statements of Income. Refer to Note 1 for further discussion.
[2] | The Condensed Consolidated Statement of Cash Flows for the quarter ended April 1, 2017 has been adjusted to reflect the adoption of ASU 2016-18, Statement of Cash Flows (Topic 230): Restricted Cash. The Condensed Consolidated Statements of Cash Flows reflects the changes during the periods in the total of cash, cash equivalents, and restricted cash. Therefore, restricted cash activity is included with cash when reconciling the beginning-of-period and end-of-period total amounts shown. Refer to Note 1 for further discussion.

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