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Long-term Debt - Receivables Facility (Details) - Receivables Facility [Member] - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 18, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 19, 2018
Debt Instrument [Line Items] |  |  |  |
Secured debt, Maximum Borrowing Capacity |  |  |  | $ 75.0
Debt cost, 1-month LIBOR plus | 1.00% |  |  |
Debt Instrument, Unused Borrowing Capacity, Fee percentage | 0.35% |  |  |
Receivables facililty, debt aggregate costs |  | $ 0.1 | $ 1.0 |

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- Definition Debt Instrument, Unused Borrowing Capacity, Fee percentage + References No definition available. + Details
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Namespace Prefix: | trs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Debt cost, 1-month LIBOR plus + References No definition available. + Details
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Namespace Prefix: | trs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of the fee that accompanies borrowing money under the debt instrument. + References No definition available. + Details
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Namespace Prefix: | trs_
Data Type: | xbrli:monetaryItemType
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- Definition Maximum borrowing capacity under the receivables facility debt arrangement. + References No definition available. + Details
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Namespace Prefix: | trs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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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
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |