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Basis Of Presentation Trade name accelerated amortization (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 01, 2019
Schedule of Trade Name Accelerated Amortization [Line Items] |  |  |  |  |  |
Amortization of identifiable intangibles |  | $ 3,400,000 | $ 1,022,000 | $ 5,182,000 | $ 3,076,000 |
Aluminum Extrusions [Member] |  |  |  |  |  |
Schedule of Trade Name Accelerated Amortization [Line Items] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  | 4 months |  |  |  |
Amortization of identifiable intangibles | $ 7,600,000 | $ 2,600,000 |  |  |  |
AACOA | Aluminum Extrusions [Member] |  |  |  |  |  |
Schedule of Trade Name Accelerated Amortization [Line Items] |  |  |  |  |  |
Finite-Lived Trade Names, Gross |  |  |  |  |  | $ 4,800,000
Trade Name Accelerated Amortization | 3,600,000 | $ 1,200,000 |  |  |  |
Futura [Member] | Aluminum Extrusions [Member] |  |  |  |  |  |
Schedule of Trade Name Accelerated Amortization [Line Items] |  |  |  |  |  |
Finite-Lived Trade Names, Gross |  |  |  |  |  | $ 5,400,000
Finite-Lived Intangible Asset, Useful Life |  | 10 years 6 months |  |  |  |
Trade Name Accelerated Amortization | 3,900,000 | $ 1,300,000 |  |  |  |
Amortization of identifiable intangibles | $ 100,000 | $ 100,000 |  |  |  |

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- Definition Trade Name Accelerated Amortization + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Gross carrying amount before accumulated amortization as of the balance sheet date of the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a reasonably expected period of economic benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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