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Acquisitions and Dispositions (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2015 | Jun. 18, 2015 | Jun. 01, 2015 | Mar. 30, 2015 | Nov. 30, 2014 | Nov. 21, 2014 | Feb. 28, 2014 | Oct. 17, 2013 | Aug. 09, 2013 | Jun. 27, 2015 | Dec. 27, 2014 | Jun. 28, 2014 | Mar. 29, 2014 | Sep. 28, 2013 | Dec. 26, 2015 | Dec. 27, 2014 | Dec. 28, 2013
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | $ 102,909 |  |  |  | $ 120,252 | $ 102,909 | $ 94,357
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance |  |  |  |  |  |  |  |  |  |  | $ 3,400 | 4,200 |  |  |  | 3,442 | 7,296 | 0
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash proceeds from sale of property |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000 |  |  | 5,538 | 33,788 | 65,147
Pre-tax gain on sale of property |  |  |  |  |  |  |  |  |  |  | 15,400 | $ 4,800 |  |  |  | $ 15,376 | 6,259 | $ 39,765
Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease-back term |  |  |  |  |  |  |  |  |  | 8 months |  |  |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease-back term |  |  |  |  |  |  |  |  |  | 14 months |  |  |  |  |  |  |  |
Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 20 years |  |
Non-compete Agreements [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |
Non-compete Agreements [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Patents and Technology [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |
Patents and Technology [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 years |  |
Trade Names and Licenses [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Trade Names and Licenses [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |
Other [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 years |  |
Other [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Useful Life |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |
Land and Building Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash proceeds from sale of property |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,700 |  |  |  |
Pre-tax gain on sale of property |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,400 |  |  |  |
Impairment charge recognized on fair value of disposed assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,200 |  |  |
Manufacturing Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of assets disposed |  |  |  |  |  |  |  |  |  | $ 15,900 |  |  |  |  |  |  |  |
Cash proceeds from sale of property |  |  |  |  |  |  |  |  |  | 61,200 |  |  |  |  |  |  |  |
Pre-tax gain on sale of property |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 39,800 |  |  |
Total sales price of property |  |  |  |  |  |  |  |  |  | 66,200 |  |  |  |  |  |  |  |
Amount of diluted share after tax |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.41 |  |  |
Goodwill allocated to disposal group |  |  |  |  |  |  |  |  |  | $ 10,500 |  |  |  |  |  |  |  |
Mueller Primaflow Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of outstanding capital stock of Primaflow |  |  |  |  |  |  | $ 24,900 |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57,500 |
After-tax net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,400 |
Carrying value of the liabilities disposed |  |  |  |  |  |  | 7,100 |  |  |  |  |  |  |  |  |  |  |
Cumulative translation loss |  |  |  |  |  |  | (6,000) |  |  |  |  |  |  |  |  |  |  |
Carrying value of assets disposed |  |  |  |  |  |  | $ 25,300 |  |  |  |  |  |  |  |  |  |  |
ABS [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of assets disposed |  |  |  |  |  | $ 1,900 |  |  |  |  |  |  |  |  |  |  |  |
Cash proceeds from sale of property |  |  |  |  |  | 6,000 |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax gain on sale of property |  |  |  |  |  | $ 4,100 |  |  |  |  |  |  |  |  |  |  |  |
DWV Ontario Manufacturing Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of assets disposed |  |  |  | $ 2,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash proceeds from sale of property |  |  |  | $ 5,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue - current |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000 |  |
Deferred revenue - noncurrent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,200 |  |
Pre-tax gain on sale of property |  |  |  |  |  |  |  |  |  |  | $ 15,400 |  |  |  |  |  |  |
Lease-back term |  |  |  | 22 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total sales price of property |  |  |  | $ 20,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of diluted share after tax |  |  |  |  |  |  |  |  |  |  | $ 0.17 |  |  |  |  |  |  |
Goodwill allocated to disposal group |  |  |  | $ 2,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Great Lakes Copper, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  | $ 70,011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  | 26,079 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  | 15,233 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets |  | 22 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant, and equipment |  | 22,771 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | [1] | 19,087 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | 27,468 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets |  | 1,413 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets acquired |  | 112,073 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  | 36,026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued wages & other employee costs |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current liabilities |  | 381 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Postretirement benefits other than pensions |  | 5,655 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other noncurrent liabilities |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities assumed |  | 42,062 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets acquired |  | 70,011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of acquisition, post-closing working capital adjustment |  | 1,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Great Lakes Copper, Inc [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | 20,273 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Great Lakes Copper, Inc [Member] | Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | 2,269 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Great Lakes Copper, Inc [Member] | Patents and Technology [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | 3,104 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Great Lakes Copper, Inc [Member] | Trade Names and Licenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | 2,453 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Great Lakes Copper, Inc [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  | $ (631) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sherwood Valve Products, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  | $ 21,795 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  | 6,490 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  | 11,892 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets |  |  | 260 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant, and equipment |  |  | 10,327 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  | (38) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets acquired |  |  | 28,931 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  | 6,022 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued wages & other employee costs |  |  | 471 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other current liabilities |  |  | 487 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Postretirement benefits other than pensions |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other noncurrent liabilities |  |  | 156 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities assumed |  |  | 7,136 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets acquired |  |  | $ 21,795 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Turbotec Products, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  | $ 14,138 |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | 1,936 |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  | 3,247 |  |  |  |  |  |  |  |  |  |  |  |  |
Other current assets |  |  |  |  | 72 |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant, and equipment |  |  |  |  | 9,080 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | 2,088 |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  | 880 |  |  |  |  |  |  |  |  |  |  |  |  |
Other assets |  |  |  |  | 59 |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets acquired |  |  |  |  | 17,362 |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  | 1,603 |  |  |  |  |  |  |  |  |  |  |  |  |
Accrued wages & other employee costs |  |  |  |  | 356 |  |  |  |  |  |  |  |  |  |  |  |  |
Other current liabilities |  |  |  |  | 51 |  |  |  |  |  |  |  |  |  |  |  |  |
Postretirement benefits other than pensions |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Other noncurrent liabilities |  |  |  |  | 1,214 |  |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities assumed |  |  |  |  | 3,224 |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets acquired |  |  |  |  | 14,138 |  |  |  |  |  |  |  |  |  |  |  |  |
Turbotec Products, Inc. [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  | 350 |  |  |  |  |  |  |  |  |  |  |  |  |
Turbotec Products, Inc. [Member] | Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  | 90 |  |  |  |  |  |  |  |  |  |  |  |  |
Turbotec Products, Inc. [Member] | Patents and Technology [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  | 220 |  |  |  |  |  |  |  |  |  |  |  |  |
Turbotec Products, Inc. [Member] | Trade Names and Licenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  | 220 |  |  |  |  |  |  |  |  |  |  |  |  |
Turbotec Products, Inc. [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |
KME Yorkshire Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  | $ 30,137 |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  |  | 17,579 |  |  |  |  |  |  |  |  |  |
Other current assets |  |  |  |  |  |  |  | 1,034 |  |  |  |  |  |  |  |  |  |
Property, plant, and equipment |  |  |  |  |  |  |  | 2,103 |  |  |  |  |  |  |  |  |  |
Goodwill | [1] |  |  |  |  |  |  | 8,075 |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  | 16,937 |  |  |  |  |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Total assets acquired |  |  |  |  |  |  |  | 45,728 |  |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  | 10,188 |  |  |  |  |  |  |  |  |  |
Accrued wages & other employee costs |  |  |  |  |  |  |  | 1,167 |  |  |  |  |  |  |  |  |  |
Other current liabilities |  |  |  |  |  |  |  | 4,236 |  |  |  |  |  |  |  |  |  |
Postretirement benefits other than pensions |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Other noncurrent liabilities |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Total liabilities assumed |  |  |  |  |  |  |  | 15,591 |  |  |  |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  |  |  | 30,137 |  |  |  |  |  |  |  |  |  |
Intangible asset type [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,400 | $ 7,300 |
KME Yorkshire Limited [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  | 10,699 |  |  |  |  |  |  |  |  |  |
KME Yorkshire Limited [Member] | Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  | 4,504 |  |  |  |  |  |  |  |  |  |
KME Yorkshire Limited [Member] | Patents and Technology [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
KME Yorkshire Limited [Member] | Trade Names and Licenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  | 1,055 |  |  |  |  |  |  |  |  |  |
KME Yorkshire Limited [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  | $ 679 |  |  |  |  |  |  |  |  |  |
Howell Metal Company [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  | $ 55,276 |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  |  | 14,564 |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  |  |  | 27,615 |  |  |  |  |  |  |  |  |
Other current assets |  |  |  |  |  |  |  |  | 571 |  |  |  |  |  |  |  |  |
Property, plant, and equipment |  |  |  |  |  |  |  |  | 20,293 |  |  |  |  |  |  |  |  |
Goodwill | [1] |  |  |  |  |  |  |  | 1,358 |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  | 2,320 |  |  |  |  |  |  |  |  |
Other assets |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
Total assets acquired |  |  |  |  |  |  |  |  | 66,721 |  |  |  |  |  |  |  |  |
Accounts payable |  |  |  |  |  |  |  |  | 9,208 |  |  |  |  |  |  |  |  |
Accrued wages & other employee costs |  |  |  |  |  |  |  |  | 703 |  |  |  |  |  |  |  |  |
Other current liabilities |  |  |  |  |  |  |  |  | 1,534 |  |  |  |  |  |  |  |  |
Postretirement benefits other than pensions |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
Other noncurrent liabilities |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
Total liabilities assumed |  |  |  |  |  |  |  |  | 11,445 |  |  |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  |  |  |  | 55,276 |  |  |  |  |  |  |  |  |
Howell Metal Company [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  | 1,910 |  |  |  |  |  |  |  |  |
Howell Metal Company [Member] | Non-compete Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
Howell Metal Company [Member] | Patents and Technology [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |  |
Howell Metal Company [Member] | Trade Names and Licenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  | 410 |  |  |  |  |  |  |  |  |
Howell Metal Company [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allocated to [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |  |
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