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INCOME TAXES - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Income Tax Contingency [Line Items] |  |  |  |  |  |
Dividends | $ 14,300 | $ 16,600 | $ 11,800 |  |  |
Dividends (in usd per share) | $ 0.50 |  |  |  |  |
Cost of investments | $ 1,060,800 |  | 852,400 |  | $ 1,060,800 |
Gross unrealized appreciation | 58,900 |  | 67,800 |  | 58,900 |
Gross unrealized depreciation | (62,800) |  | (61,700) |  | (62,800) |
Net unrealized appreciation (depreciation) | (3,900) |  | 6,100 |  | (3,900) |
Deferred tax liability | 8,798 |  | $ 5,747 |  | 8,798 |
Income tax provision | 534 |  |  | $ 314 | 726 | $ 710
Accrual for U.S. federal excise tax | 200 |  |  |  | 300 |
Common Stock, Dividends, Per Share, Cash Paid |  | $ 0.63 | $ 0.48 |  |  |
RIC |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Cost of investments | 1,033,800 |  |  |  | 1,033,800 |
Gross unrealized appreciation | 16,700 |  |  |  | 16,700 |
Gross unrealized depreciation | (60,600) |  |  |  | (60,600) |
Net unrealized appreciation (depreciation) | (43,900) |  |  |  | (43,900) |
Taxable Subsidiary |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Cost of investments | 27,000 |  |  |  | 27,000 |
Gross unrealized appreciation | 42,200 |  |  |  | 42,200 |
Gross unrealized depreciation | (2,200) |  |  |  | (2,200) |
Net unrealized appreciation (depreciation) | 40,000 |  |  |  | 40,000 |
Income tax provision | $ 300 |  |  | $ 300 | $ 400 | $ 700
Regular Dividends |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid |  | 0.48 |  |  |  |
Special Dividend |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid |  | $ 0.15 |  |  |  |

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- Definition The amount of excise and sales taxes included in sales and revenues, which are then deducted as a cost of sales. Includes excise taxes, which are applied to specific types of transactions or items (such as gasoline or alcohol); and sales, use and value added taxes, which are applied to a broad class of revenue-producing transactions involving a wide range of goods and services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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