XML 65 R54.htm IDEA: XBRL DOCUMENT
v3.25.0.1

INCOME TAXES - Distributions (Details) - $ / shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) | $ 0.63 | $ 0.64 | $ 0.63 | $ 0.63 | $ 0.63 | $ 0.62 | $ 0.59 | $ 0.58 | $ 0.57 | $ 0.50 | $ 0.63 | $ 0.48 | $ 2.53 | $ 2.42 | $ 2.18
O 2024 Q4 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  | $ 0.06 |  |  |  |  |  |  |  |  |  |  |
O 2025 Q1 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  | $ 0.06 |  |  |  |  |  |  |  |  |  |  |  |
O 2025 Q2 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  | $ 0.06 |  |  |  |  |  |  |  |  |  |  |  |  |
O 2024 Q2 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  |  |  | $ 0.06 |  |  |  |  |  |  |  |  |
O 2024 Q3 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  |  | $ 0.06 |  |  |  |  |  |  |  |  |  |
O 2025 Q3 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) | $ 0.05 |  |  |  |  |  |  |  |  |  |  |  |  |  |
O 2023 Q4 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  |  |  |  |  | $ 0.05 |  |  |  |  |  |  |
O 2024 Q1 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  |  |  |  | $ 0.05 |  |  |  |  |  |  |  |
O 2022 Q1 Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  |  |  |  |  |  |  |  | 0.48 |  |  |  |
S 2022 Q1 Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  |  |  |  |  |  |  |  | $ 0.15 |  |  |  |
O 2023 Q3 Supplemental Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends cash paid (in usd per share) |  |  |  |  |  |  |  |  | $ 0.05 |  |  |  |  |  |

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 -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + 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_O2024Q4SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2025Q1SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2025Q2SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2024Q2SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2024Q3SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2025Q3SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2023Q4SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2024Q1SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2022Q1DividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_S2022Q1DividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DividendsAxis=cswc_O2023Q3SupplementalDividendsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |