Consolidated Income Statements (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Depreciation and amortization expense	$ 32,643	$ 29,852	$ 26,061

Cost of goods and services sold depreciation amortization and impairment expense.

No definition available.

Name:	carg_CostOfGoodsAndServicesSoldDepreciationAmortizationAndImpairmentExpense
Namespace Prefix:	carg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration