{"cik": 1396440, "entity": "Main Street Capital Corporation", "tags": {"NetIncomeLoss": [{"end": "2020-12-31", "val": 29383000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2020-01-01"}, {"end": "2021-12-31", "val": 330762000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2021-01-01"}, {"end": "2021-12-31", "val": 330762000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2021-01-01"}, {"end": "2022-12-31", "val": 241606000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 241606000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 241606000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2022-01-01"}, {"end": "2023-12-31", "val": 428447000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 428447000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 428447000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2023-01-01"}, {"end": "2024-12-31", "val": 508080000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2024-01-01"}, {"end": "2024-12-31", "val": 508080000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2024-01-01"}, {"end": "2025-12-31", "val": 493398000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2025-01-01"}], "IncomeTaxExpenseBenefit": [{"end": "2020-12-31", "val": -13541000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2020-01-01"}, {"end": "2021-12-31", "val": 32863000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2021-01-01"}, {"end": "2021-12-31", "val": 32863000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2021-01-01"}, {"end": "2022-12-31", "val": 23325000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 23325000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 23325000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2022-01-01"}, {"end": "2023-12-31", "val": 22642000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 22642000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 0, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2023-01-01"}, {"end": "2024-12-31", "val": 30633000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2024-01-01"}, {"end": "2024-12-31", "val": 0, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2024-01-01"}], "InterestExpense": [{"end": "2020-12-31", "val": 49587000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2020-01-01"}, {"end": "2021-12-31", "val": 58836000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2021-01-01"}, {"end": "2021-12-31", "val": 58836000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2021-01-01"}, {"end": "2022-12-31", "val": 78276000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 78276000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2022-01-01"}, {"end": "2023-12-31", "val": 102575000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2023-01-01"}], "NetCashProvidedByUsedInOperatingActivities": [{"end": "2020-12-31", "val": -54084000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2020-01-01"}, {"end": "2021-12-31", "val": -515373000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2021-01-01"}, {"end": "2021-12-31", "val": -515373000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2021-01-01"}, {"end": "2022-12-31", "val": -246936000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2022-01-01"}, {"end": "2022-12-31", "val": -246936000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2022-01-01"}, {"end": "2022-12-31", "val": -246936000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2022-01-01"}, {"end": "2023-12-31", "val": 285322000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 285322000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 285322000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2023-01-01"}, {"end": "2024-12-31", "val": -87118000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2024-01-01"}, {"end": "2024-12-31", "val": -87118000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2024-01-01"}, {"end": "2025-12-31", "val": -45705000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2025-01-01"}], "StockholdersEquity": [{"end": "2013-12-31", "val": 792533000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2014-12-31", "val": 939982000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2014-12-31", "val": 939982000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2015-12-31", "val": 1070894000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2015-12-31", "val": 1070894000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2015-12-31", "val": 1070894000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2016-12-31", "val": 1201481000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2016-12-31", "val": 1201481000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2016-12-31", "val": 1201481000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2016-12-31", "val": 1201481000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2017-12-31", "val": 1380368000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2017-12-31", "val": 1380368000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2017-12-31", "val": 1380368000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2017-12-31", "val": 1380368000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2018-12-31", "val": 1476049000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2018-12-31", "val": 1476049000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2018-12-31", "val": 1476049000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2018-12-31", "val": 1476049000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2019-12-31", "val": 1536390000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2019-12-31", "val": 1536390000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2019-12-31", "val": 1536390000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2019-12-31", "val": 1536390000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2020-12-31", "val": 1514767000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2020-12-31", "val": 1514767000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2020-12-31", "val": 1514767000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2020-12-31", "val": 1514767000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2021-12-31", "val": 1788846000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2021-12-31", "val": 1788846000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2021-12-31", "val": 1788846000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2021-12-31", "val": 1788846000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2022-12-31", "val": 2108586000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2022-12-31", "val": 2108586000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2022-12-31", "val": 2108586000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2022-12-31", "val": 2108586000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2023-12-31", "val": 2477399000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2023-12-31", "val": 2477399000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2023-12-31", "val": 2477399000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2024-12-31", "val": 2797838000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2024-12-31", "val": 2797838000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2025-12-31", "val": 2993893000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}], "LongTermDebt": [{"end": "2021-12-31", "val": 1796056000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2022-12-31", "val": 1999102000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2022-12-31", "val": 1999102000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2023-12-31", "val": 1802344000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2023-12-31", "val": 1802344000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2024-12-31", "val": 2122371000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2024-12-31", "val": 2122371000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2025-12-31", "val": 2457594000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}], "CashAndCashEquivalentsAtCarryingValue": [{"end": "2021-12-31", "val": 32629000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2022-12-31", "val": 49121000, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2022-12-31", "val": 49121000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2023-12-31", "val": 60083000, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2023-12-31", "val": 60083000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2024-12-31", "val": 78251000, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2024-12-31", "val": 78251000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2025-12-31", "val": 41959000, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}], "WeightedAverageNumberOfDilutedSharesOutstanding": [{"end": "2020-12-31", "val": 65705963, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2020-01-01"}, {"end": "2021-12-31", "val": 68960923, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2021-01-01"}, {"end": "2021-12-31", "val": 68960923, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2021-01-01"}, {"end": "2022-12-31", "val": 74482176, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 74482176, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 74482176, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2022-01-01"}, {"end": "2023-12-31", "val": 81916663, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 81916663, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 81916663, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2023-01-01"}, {"end": "2024-12-31", "val": 86805755, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2024-01-01"}, {"end": "2024-12-31", "val": 86805755, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2024-01-01"}, {"end": "2025-12-31", "val": 89363140, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2025-01-01"}], "WeightedAverageNumberOfSharesOutstandingBasic": [{"end": "2020-12-31", "val": 65705963, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2020-01-01"}, {"end": "2021-12-31", "val": 68960923, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2021-01-01"}, {"end": "2021-12-31", "val": 68960923, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2021-01-01"}, {"end": "2022-12-31", "val": 74482176, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 74482176, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2022-01-01"}, {"end": "2022-12-31", "val": 74482176, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2022-01-01"}, {"end": "2023-12-31", "val": 81916663, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 81916663, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2023-01-01"}, {"end": "2023-12-31", "val": 81916663, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2023-01-01"}, {"end": "2024-12-31", "val": 86805755, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28", "start": "2024-01-01"}, {"end": "2024-12-31", "val": 86805755, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2024-01-01"}, {"end": "2025-12-31", "val": 89363140, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27", "start": "2025-01-01"}], "CommonStockSharesOutstanding": [{"end": "2021-12-31", "val": 70700885, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2022-12-31", "val": 78463599, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2022-12-31", "val": 84830679, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2023-12-31", "val": 78463599, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2023-12-31", "val": 84830679, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2024-12-31", "val": 88398713, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2024-12-31", "val": 88398713, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}, {"end": "2025-12-31", "val": 89834849, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}], "EntityCommonStockSharesOutstanding": [{"end": "2023-02-23", "val": 79549888, "fy": 2022, "fp": "FY", "form": "10-K", "filed": "2023-02-24"}, {"end": "2024-02-21", "val": 84980145, "fy": 2023, "fp": "FY", "form": "10-K", "filed": "2024-02-23"}, {"end": "2025-02-27", "val": 88556229, "fy": 2024, "fp": "FY", "form": "10-K", "filed": "2025-02-28"}, {"end": "2026-02-26", "val": 90104831, "fy": 2025, "fp": "FY", "form": "10-K", "filed": "2026-02-27"}]}}