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Acquisitions and Dispositions - Narrative (Details) - USD ($) $ in Thousands |  |  |  |  |  |  | 3 Months Ended | 5 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 07, 2021 | Oct. 25, 2021 | Sep. 02, 2021 | Jan. 29, 2021 | Aug. 03, 2020 | Jan. 17, 2020 | Sep. 25, 2021 | Dec. 26, 2020 | Dec. 25, 2021 | Dec. 26, 2020 | Jul. 28, 2021
Mueller Middle East |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest in joint venture | 15.00% |  |  |  |  |  |  |  |  |  |
Mueller Middle East | Joint Venture |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest in joint venture | 40.00% |  |  |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Copper Bar |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on disposal of businesses |  | $ 6,500 |  |  |  |  |  |  |  |  |
Consideration for sale of businesses |  | $ 10,100 |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  | $ 3,600
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Die-Mold |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales of disposed of business |  |  |  |  |  |  |  |  | $ 10,900 | $ 13,500 |
Operating income of disposed business |  |  |  |  |  |  |  |  | 2,200 |  |
Net income of disposed business |  |  |  |  |  |  |  |  |  | 2,300 |
Gain (loss) on disposal of businesses |  |  | $ 4,700 |  |  |  |  |  |  |  |
Consideration for sale of businesses |  |  | $ 22,800 |  |  |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Fabricated Tube Products and Shoals Tubular, Inc. |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales of disposed of business |  |  |  |  |  |  |  |  | 37,000 | 51,500 |
Net income of disposed business |  |  |  |  |  |  |  |  | 5,500 | 6,400 |
Gain (loss) on disposal of businesses |  |  |  |  |  |  |  |  | 46,600 |  |
Consideration for sale of businesses |  |  |  |  |  |  |  |  |  |  | 75,700
Assets |  |  |  |  |  |  |  |  |  |  | 32,700
Carrying value of the liabilities disposed |  |  |  |  |  |  |  |  |  |  | $ 3,600
Mueller Middle East |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Ownership interest acquired (as a percent) | 55.00% |  |  |  |  |  |  |  |  |  |
Total consideration paid | $ 20,017 |  |  |  |  |  |  |  |  |  |
Cash paid for acquisition | 15,800 |  |  |  |  |  |  |  |  |  |
Debt assumed | 2,600 |  |  |  |  |  |  |  |  |  |
Payment for contingent consideration liability | 1,000 |  |  |  |  |  |  |  |  |  |
Equity interest issued or issuable | $ 700 |  |  |  |  |  |  |  |  |  |
Asset acquisition, revenue from acquiree |  |  |  |  |  |  |  |  | 48,200 | $ 37,400 |
Hart & Cooley Flexible Duct Business |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total consideration paid |  |  |  | $ 15,300 |  |  |  |  |  |  |
Cash paid for acquisition |  |  |  | $ 14,000 |  |  |  |  |  |  |
Payment for contingent consideration liability |  |  |  |  |  |  | $ 1,300 |  |  |  |
Kessler |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total consideration paid |  |  |  |  | $ 57,200 |  |  |  |  |  |
Asset acquisition, revenue from acquiree |  |  |  |  |  |  |  | $ 55,000 | 207,900 |  |
Increase in intangible assets |  |  |  |  |  |  |  |  | 1,500 |  |
Decrease in property, plant, and equipment |  |  |  |  |  |  |  |  | (1,400) |  |
Goodwill, purchase accounting adjustments |  |  |  |  |  |  |  |  | $ (100) |  |
Shoals |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total consideration paid |  |  |  |  |  | $ 15,321 |  |  |  |  |
Retail Distribution Business |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |
Interest in joint venture |  |  | 17.00% |  |  |  |  |  |  |  |
Ownership interest acquired (as a percent) |  |  | 17.00% |  |  |  |  |  |  |  |

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