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INCOME TAXES - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2022
Income Tax Contingency [Line Items] |  |  |
Dividends | $ 22,900 | $ 20,900 |
Dividends declared (in usd per share) | $ 0.59 | $ 0.58 |
Cost of investments | $ 1,275,400 | $ 1,210,800 |
Gross unrealized appreciation | 82,700 | 72,300 |
Gross unrealized depreciation | (68,300) | (76,800) |
Net unrealized appreciation (depreciation) | 14,400 | (4,500) |
Deferred tax liability | 11,855 | $ 12,117 |
Income tax provision | 447 |  | $ 192
Excise tax | 100 |  | 100
RIC |  |  |
Income Tax Contingency [Line Items] |  |  |
Cost of investments | 1,230,000 |  |
Gross unrealized appreciation | 17,500 |  |
Gross unrealized depreciation | (63,600) |  |
Net unrealized appreciation (depreciation) | (46,100) |  |
Taxable Subsidiary |  |  |
Income Tax Contingency [Line Items] |  |  |
Cost of investments | 45,400 |  |
Gross unrealized appreciation | 65,200 |  |
Gross unrealized depreciation | (4,700) |  |
Net unrealized appreciation (depreciation) | 60,500 |  |
Income tax provision | $ 300 |  | $ 100
Regular Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) | $ 0.54 | $ 0.53 |
Supplemental Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) | $ 0.05 | $ 0.05 |

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- Definition Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock. + 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 2 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481071/942-405-45-2 + Details
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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 -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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