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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 30, 2017
Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | MUELLER INDUSTRIES, INC. SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS Years Ended December 30, 2017, December 31, 2016, and December 26, 2015
|  |  |  | Additions |  |  |  |
(In thousands) |  | Balance at beginning of year |  | Charged to costs and expenses |  | Other additions |  | Deductions |  | Balance at end of year
2017 |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 637 |  |  | $ | 422 |  |  | $ | (61 | ) |  | $ | 18 |  |  | $ | 980 |
Environmental reserves |  | $ | 21,864 |  |  | $ | 7,491 |  |  | $ | — |  |  | $ | 1,351 |  |  | $ | 28,004 |
Valuation allowance for deferred tax assets |  | $ | 18,681 |  |  | $ | 7 |  |  | $ | 11,628 |  | (1) | $ | — |  |  | $ | 30,316 |
2016 |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 623 |  |  | $ | 160 |  |  | $ | 2 |  |  | $ | 148 |  |  | $ | 637 |
Environmental reserves |  | $ | 21,667 |  |  | $ | 894 |  |  | $ | — |  |  | $ | 697 |  |  | $ | 21,864 |
Valuation allowance for deferred tax assets |  | $ | 17,650 |  |  | $ | 3 |  |  | $ | 1,028 |  |  | $ | — |  |  | $ | 18,681 |
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 666 |  |  | $ | (130 | ) |  | $ | 201 |  |  | $ | 114 |  |  | $ | 623 |
Environmental reserves |  | $ | 22,661 |  |  | $ | 76 |  |  | $ | — |  |  | $ | 1,070 |  |  | $ | 21,667 |
Valuation allowance for deferred tax assets |  | $ | 17,119 |  |  | $ | (5 | ) |  | $ | 536 |  |  | $ | — |  |  | $ | 17,650 |
(1) The valuation allowance increased by $11.6 million during 2017 to a balance of $30.3 million as of December 30, 2017. The change to the valuation allowance in 2017 was attributable to the recording of valuation allowances against tax attributes generated in 2017 primarily resulting from the Act and increased interest expense in state tax jurisdictions where the Company has no tax liability.

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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