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INDUSTRIAL DEVELOPMENT BONDS: (Details) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
INDUSTRIAL DEVELOPMENT BONDS: |  |
Industrial development bonds, average floating interest rate (as a percent) | 0.10% | 0.10%

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- References No definition available. + Details
Name: | tr_IndustrialDevelopmentBondsDisclosureAbstract
Namespace Prefix: | tr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the percentage of average floating interest rate for industrial development bonds. + References No definition available. + Details
Name: | tr_IndustrialDevelopmentBondsNoncurrentFloatingInterestRate
Namespace Prefix: | tr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration