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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 28, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | MUELLER INDUSTRIES, INC. SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS Years Ended December 28, 2019, December 29, 2018, and December 30, 2017
|  |  |  | Additions |  |  |  |
(In thousands) |  | Balance at beginning of year |  | Charged to costs and expenses |  | Other additions |  | Deductions |  | Balance at end of year
2019 |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 836 |  |  | $ | (81 | ) |  | $ | 263 |  |  | $ | 248 |  |  | $ | 770 |
Environmental reserves |  | $ | 23,619 |  |  | $ | 1,659 |  |  | $ | — |  |  | $ | 4,412 |  |  | $ | 20,866 |
Valuation allowance for deferred tax assets |  | $ | 25,311 |  |  | $ | 2,919 |  |  | $ | 290 |  |  | $ | 5,390 |  |  | $ | 23,130 |
2018 |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 980 |  |  | $ | (286 | ) |  | $ | 220 |  |  | $ | 78 |  |  | $ | 836 |
Environmental reserves |  | $ | 28,004 |  |  | $ | 1,981 |  |  | $ | — |  |  | $ | 6,366 |  |  | $ | 23,619 |
Valuation allowance for deferred tax assets |  | $ | 30,316 |  |  | $ | 1,209 |  |  | $ | 150 |  |  | $ | 6,364 |  |  | $ | 25,311 |
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 |
(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 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 valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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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