Unaudited Condensed Consolidated Income Statements (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Depreciation and amortization expense	$ 7,758	$ 7,324

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