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Regulations and Supervision - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 subsidiary_Bank | Dec. 31, 2020 banking_Office | Dec. 31, 2019 banking_Office
Equity [Abstract] |  |  |
Number of subsidiary banks (banking office) | 4 | 4 | 4

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- Definition Nature of Operations, Number of Subsidiary Banks + References No definition available. + Details
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Namespace Prefix: | tmp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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