Estimated Time until Primary Insurance is Exhausted

No definition available.

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- Definition

Loss Contingency, Number of Plantiffs Specifying Damages Sought

+ References

No definition available.

+ Details

Name:	trs_LossContingencyNumberOfPlantiffsSpecifyingDamagesSought
Namespace Prefix:	trs_
Data Type:	xbrli:integerItemType
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- Definition

Percentage of Settlement and Defense Costs Covered by Insurance

+ References

No definition available.

+ Details

Name:	trs_PercentageOfSettlementAndDefenseCostsCoveredByInsurance
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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

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

- Details

Name:	us-gaap_LossContingenciesLineItems
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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingencyNumberOfPlaintiffs
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

Name:	us-gaap_LossContingencyPendingClaimsNumber
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Commitments and Contingencies - Asbestos Narrative (Details) (USD $) In Millions, unless otherwise specified			273 Months Ended	9 Months Ended
	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]	Sep. 30, 2013 Asbestos [Member]	Sep. 30, 2013 Asbestos [Member] Pending Litigation [Member] claimants cases
Loss Contingencies [Line Items]
Number of pending cases				1,078
Number of pending claims				7,950
Number of pending claims seeking specific amounts of damages				133
Total settlement costs			$ 6.4
Percentage of settlement and defense costs covered by insurance			40.00%
Estimated Time until Primary Insurance is Exhausted	1 year	2 years