XML 126 R49.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Summary of Significant Accounting Policies - Self-insurance (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012
--- | ---
Minimum [Member] | General Liability [Member] |
Self-insurance coverage [Line Items] |
Maximum Retention | $ 0.3
Maximum [Member] | Workers' Compensation [Member] |
Self-insurance coverage [Line Items] |
Maximum Retention | 0.5
Maximum [Member] | General Liability [Member] |
Self-insurance coverage [Line Items] |
Maximum Retention | 2.0
Maximum [Member] | Group Medical Plan [Member] |
Self-insurance coverage [Line Items] |
Stop Loss Limit | $ 0.3

X
- Definition Self-insurance maximum retention per occurrence. + References No definition available. + Details
Name: | trs_MaximumRetention
Namespace Prefix: | trs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Self-insurance stop loss limit per occurrence. + References No definition available. + Details
Name: | trs_StopLossLimit
Namespace Prefix: | trs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant