XML 71 R54.htm IDEA: XBRL DOCUMENT
v3.23.1

INCOME TAXES - Distributions (Details) - $ / shares |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  | $ 0.57 | $ 0.50 | $ 0.63 | $ 0.48 | $ 0.97 | $ 0.54 | $ 0.53 | $ 0.52 | $ 0.51 | $ 0.51 | $ 0.51 | $ 0.51 | $ 2.18 | $ 2.56 | $ 2.04
Regular dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) | $ 0.52 | $ 0.48 | $ 0.47 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Special Dividend |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  | $ 0.15 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Supplemental dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) | $ 0.05 |  | $ 0.50 |  |  |  |  |  | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.10 | $ 0.10 |  |  |

X
- Definition Aggregate dividends paid 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 https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- 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_IncomeTaxContingencyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DividendsAxis=cswc_RegularDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_SpecialDividendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_SupplementalDividendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |