Trust Investments (Components of preneed cemetery trust investments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt and Equity Securities, FV-NI [Line Items]
Preneed cemetery trust investments	$ 97,489	$ 86,604
Preneed Cemetery Trust Investments [Member]
Debt and Equity Securities, FV-NI [Line Items]
Preneed cemetery trust investments, at market value	100,318	89,081
Less: allowance for contract cancellation	(2,829)	(2,477)
Preneed cemetery trust investments	97,489	86,604
Available-for-sale Securities, Amortized Cost Basis	94,304	82,573
Unrealized Gains	10,228	13,856
Unrealized Losses	(5,335)	(8,341)
Fair Market Value	99,197	88,088
Preneed Cemetery Trust Investments [Member] \| Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale Securities, Amortized Cost Basis	28
Unrealized Gains	5
Unrealized Losses	0
Fair Market Value	33
Preneed Funeral Trust Investments [Member]
Debt and Equity Securities, FV-NI [Line Items]
Preneed cemetery trust investments, at market value	111,587	104,166
Less: allowance for contract cancellation	(3,183)	(2,931)
Available-for-sale Securities, Amortized Cost Basis	106,087	97,700
Unrealized Gains	9,266	13,125
Unrealized Losses	(4,788)	(7,570)
Fair Market Value	110,565	$ 103,255
Preneed Funeral Trust Investments [Member] \| Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale Securities, Amortized Cost Basis	26
Unrealized Gains	4
Unrealized Losses	0
Fair Market Value	$ 30

The allowance for contract cancellation on trust investments.

No definition available.

Name:	csv_AllowanceForContractCancellation
Namespace Prefix:	csv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer, before allowance for related contract cancellations.

+ References

No definition available.

+ Details

Name:	csv_AvailableForSaleSecuritiesCurrentBeforeAllowanceForContractCancellation
Namespace Prefix:	csv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate fair value as of the balance sheet date of financial instruments and other positions which may include: (1) fixed income securities; (2) common stock; (3) mutual funds; (4) common trust funds; (5) master trusts; (6) certificates of deposit; (7) bank deposits; and (8) partnerships.

+ References

No definition available.

+ Details

Name:	csv_PreneedCemeteryTrustInvestments
Namespace Prefix:	csv_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=csv_PreneedCemeteryTrustInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=csv_PreneedFuneralTrustInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: