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SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS | 12 Months Ended
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Dec. 26, 2020
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 26, 2020, December 28, 2019, and December 29, 2018
|  |  |  | Additions |  |  |  |
(In thousands) |  | Balance at beginning of year |  | Charged to costs and expenses |  | Other additions |  | Deductions |  | Balance at end of year
2020 |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 770 |  |  | $ | 1,208 |  |  | $ | — |  |  | $ | 440 |  |  | $ | 1,538 |
Environmental reserves |  | $ | 20,866 |  |  | $ | 4,242 |  |  | $ | — |  |  | $ | 1,107 |  |  | $ | 24,001 |
Valuation allowance for deferred tax assets |  | $ | 23,130 |  |  | $ | 2,317 |  |  | $ | 1,898 |  |  | $ | 146 |  |  | $ | 27,199 |
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 |

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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=120395691&loc=d3e24092-122690 + Details
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- References No definition available. + Details
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