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Basis of Presentation and Summary of Significant Accounting Policies Income Taxes (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Income taxes before discrete items | (26.50%) | (31.00%)
Total benefit for income taxes | $ 5,082 | $ 5,641

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- Definition Estimated Effective Income Tax Rate Reconciliation, Before Discrete Items, Percent + References No definition available. + Details
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- Definition Income Tax Expense (Benefit), Net of Uncertain Tax Positions + References No definition available. + Details
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Namespace Prefix: | csv_
Data Type: | xbrli:monetaryItemType
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- References No definition available. + Details
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