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v3.20.1

Subsequent Events (Details) - USD ($) |  |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | ---
May 19, 2020 | May 18, 2020 | Apr. 19, 2020 | Mar. 01, 2019 | Mar. 01, 2018 | Sep. 30, 2020 | Mar. 31, 2020 | Mar. 31, 2019
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Dividends declared per common share (in dollars per Share) |  |  |  | $ 0.075 | $ 0.075 |  | $ 0.075 | $ 0.075
Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Dividends declared per common share, increase (in dollars per Share) | $ 0.05 |  |  |  |  |  |  |
Chief Executive Officer [Member] | Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Base salary, percentage change |  |  | 15.00% |  |  |  |  |
Chief Operating Officer [Member] | Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Base salary, percentage change |  |  | 10.00% |  |  |  |  |
Executive Officer [Member] | Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Base salary, percentage change |  |  | 7.50% |  |  |  |  |
Board of Directors [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Quarterly installment of annual cash retainer |  |  |  |  |  |  | $ 35,000 |
Board of Directors [Member] | Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Quarterly installment of annual cash retainer |  |  | $ 29,750 |  |  |  |  |
Cash retainer, percentage change |  |  | 15.00% |  |  |  |  |
Line of Credit [Member] | Subsequent Event |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Remaining borrowing capacity |  | $ 74,000,000 |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.625% |  |  |  |  |  |
Forecast |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Dividends declared per common share (in dollars per Share) |  |  |  |  |  | $ 0.35 |  |

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- Definition Base Salary, Percentage Change + References No definition available. + Details
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Namespace Prefix: | csv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Common Stock, Dividends, Per Share, Declared, Increase Authorized + References No definition available. + Details
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Namespace Prefix: | csv_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Quarterly Installment of Annual Cash Retainer + References No definition available. + Details
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Namespace Prefix: | csv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Quarterly Installment Of Annual Cash Retainer, Percentage Change + References No definition available. + Details
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Namespace Prefix: | csv_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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Namespace Prefix: | us-gaap_
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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