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INDUSTRIAL DEVELOPMENT BONDS (Details) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
INDUSTRIAL DEVELOPMENT BONDS |  |
Industrial development bonds, average floating interest rate (as a percent) | 1.50% | 1.00%

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