XML 69 R45.htm IDEA: XBRL DOCUMENT v3.19.3

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

X

- Definition

[Line Items] for Schedule of Trade Name Accelerated Amortization [Table]

+ References

No definition available.

+ Details

Name:	tg_ScheduleofTradeNameAcceleratedAmortizationLineItems
Namespace Prefix:	tg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Trade Name Accelerated Amortization

+ References

No definition available.

+ Details

Name:	tg_TradeNameAcceleratedAmortization
Namespace Prefix:	tg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_FiniteLivedTradeNamesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=tg_AluminumExtrusionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsegmentsAxis=tg_AacoaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsegmentsAxis=tg_FuturaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: