Loss Contingency, Number of Plaintiffs Specifying Damages Sought

No definition available.

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- Definition

Number of pending cases related to a loss contingency

+ References

No definition available.

+ Details

Name:	trs_LossContingencyPendingCasesNumber
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- Definition

Percentage of Settlement and Defense Costs Covered by Insurance

+ References

No definition available.

+ Details

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- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
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Data Type:	xbrli:stringItemType
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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14435-108349

+ Details

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- Details

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- Details

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- Details

Name:	us-gaap_LitigationStatusAxis=us-gaap_PendingLitigationMember
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- Details

Name:	trs_DamagesSoughtTypeAxis=trs_CompensatoryOnlyDamagesMember
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Commitments and Contingencies Asbestos Narrative (Details) - Asbestos [Member] $ in Millions	3 Months Ended	351 Months Ended
	Mar. 31, 2020 USD ($) claimants cases	Mar. 31, 2020 USD ($) claimants cases	Dec. 31, 2019 claimants	Dec. 31, 2018 claimants
Loss Contingencies [Line Items]
Loss Contingency, Pending Cases, Number \| cases	348	348
Loss Contingency, Pending Claims, Number	4,719	4,719	4,759	4,820
Total settlement costs \| $		$ 9.7
Percentage of settlement and defense costs covered by insurance		40.00%
Punitive Only Damages [Member] \| Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value \| $	$ 5.0
Number of pending claims seeking specific amounts of damages	1	1
Compensatory Only Damages [Member] \| Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of pending claims seeking specific amounts of damages	55	55