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Property and Equipment, Net - Depreciation Expense Table (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Depreciation Expense [Line Items] |  |
Depreciation expense | $ 8,030 | $ 7,050
Continuing Operations [Member] |  |
Depreciation Expense [Line Items] |  |
Depreciation expense | 8,030 | 7,050
Cost of Sales [Member] | Continuing Operations [Member] |  |
Depreciation Expense [Line Items] |  |
Depreciation expense | 6,740 | 6,060
Selling, General and Administrative Expenses [Member] | Continuing Operations [Member] |  |
Depreciation Expense [Line Items] |  |
Depreciation expense | $ 1,290 | $ 990

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- Details
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Namespace Prefix: | trs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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Data Type: | xbrli:monetaryItemType
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Period Type: | duration