XML 81 R70.htm IDEA: XBRL DOCUMENT v3.24.3

Retirement plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement plans
Minimum percentage of annual eligible compensation by the participants			1.00%
Maximum percentage of annual eligible compensation by the participants			90.00%
Percentage of contribution matched			5.00%
Employer match of employee contributions of first 3% of contributions			100.00%
Percentage of contribution, matched 100% by employer			3.00%
Employer match of employee contributions of next 3% of contributions			50.00%
Percentage of contribution, matched 50% by employer			2.00%
Contribution expenses	$ 0.2	$ 0.3	$ 0.9	$ 0.9

X

- Definition

Represents the employer matching contribution of the second level of employee contributions.

+ References

No definition available.

+ Details

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Namespace Prefix:	th_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the first level of employee contributions which are matched by the employer.

+ References

No definition available.

+ Details

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Namespace Prefix:	th_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the second level of employee contributions which are matched by the employer

+ References

No definition available.

+ Details

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Namespace Prefix:	th_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	th_DefinedContributionPlanMinimumAnnualContributionsPerEmployeePercent
Namespace Prefix:	th_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480794/715-70-50-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration