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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

X
- Definition Cost of goods and services sold depreciation amortization and impairment expense. + References No definition available. + Details
Name: | carg_CostOfGoodsAndServicesSoldDepreciationAmortizationAndImpairmentExpense
Namespace Prefix: | carg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeStatementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration