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Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Percentage of investment company taxable income	90.00%
Percentage of investment company net tax exempt income	90.00%
Ordinary income distribution made from long term capital gain	$ 0
Federal excise tax	$ 2,700,000	$ 2,600,000	$ 2,400,000

X

- Definition

Federal excise tax.

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No definition available.

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- Definition

Ordinary income distribution made from long term capital gain.

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No definition available.

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- Definition

Percentage of investment company net tax exempt income.

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No definition available.

+ Details

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X

- Definition

Percentage of investment company taxable income.

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No definition available.

+ Details

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Namespace Prefix:	trin_
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- References

No definition available.

+ Details

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