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CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS AND RETAINED EARNINGS (Parenthetical) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS AND RETAINED EARNINGS |  |  |  |
Stock dividends (as a percent) | 3.00% | 3.00% | 3.00% | 3.00%

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- Definition The dividend rate applied to calculate stock dividends distributed based on the number of shares outstanding as of the record date. + References No definition available. + Details
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Namespace Prefix: | tr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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