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v2.4.1.9

Long-term Debt - Debt Table (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Debt Instrument [Line Items] |  |
Debt | $ 671,500 us-gaap_DebtAndCapitalLeaseObligations | $ 639,330 us-gaap_DebtAndCapitalLeaseObligations
Current maturities, debt | 23,590 us-gaap_DebtCurrent | 23,860 us-gaap_DebtCurrent
Long-term debt | 647,910 us-gaap_LongTermDebtAndCapitalLeaseObligations | 615,470 us-gaap_LongTermDebtAndCapitalLeaseObligations
Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Debt | 580,040 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = trs_CreditAgreementMember | 559,530 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = trs_CreditAgreementMember
Receivables Facility and other [Member] [Member] |  |
Debt Instrument [Line Items] |  |
Debt | $ 91,460 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = trs_ReceivablesFacilityandotherMemberMember | $ 79,800 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_DebtInstrumentAxis = trs_ReceivablesFacilityandotherMemberMember

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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 + Details
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Balance Type: | credit
Period Type: | instant

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- Details
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Balance Type: | na
Period Type: | duration

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- Definition Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section H + Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |