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SIGNIFICANT ACCOUNTING POLICIES - Benefits and Investment (Details) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($)
SIGNIFICANT ACCOUNTING POLICIES |  |  |
Premium paid for split dollar life insurance agreements | $ 0 | $ 0 | $ 0
Agreements terminated | item | 0 | 0 |
Amount received on termination of certain split dollar agreements |  |  | $ 7,591

X
- Definition The number of split dollar agreements terminated. + References No definition available. + Details
Name: | tr_NumberOfSplitDollarAgreementsTerminated
Namespace Prefix: | tr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount paid as premium for the split dollar life insurance agreements. + References No definition available. + Details
Name: | tr_PremiumPaidForSplitDollarLifeInsuranceAgreements
Namespace Prefix: | tr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount received on termination of the split dollar life insurance agreements. + References No definition available. + Details
Name: | tr_ProceedsFromTerminationOfSplitDollarLifeInsuranceAgreements
Namespace Prefix: | tr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration