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Accrued Expenses, Accrued Income Taxes, and Other Current Liabilities - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($)
Payables and Accruals [Abstract]
Decrease in accrued bonus	$ 8,987

X

- Definition

Decrease in accrued bonus.

+ References

No definition available.

+ Details

Name:	carg_DecreaseInAccruedBonus
Namespace Prefix:	carg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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