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INCOME TAXES - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024
Income Tax Contingency [Line Items] |  |  |
Dividends | $ 30,500 | $ 29,500 | $ 28,400
Dividends declared (in usd per share) | $ 0.64 | $ 0.63 | $ 0.63
Cost of investments | $ 1,538,100 |  | $ 1,471,100
Gross unrealized appreciation | 96,000 |  | 96,300
Gross unrealized depreciation | 125,600 |  | 96,400
Net unrealized appreciation (depreciation) | (29,600) |  | 100
Total net deferred tax (liabilities) assets | (12,590) |  | $ (11,997)
RIC |  |  |
Income Tax Contingency [Line Items] |  |  |
Cost of investments | 1,485,600 |  |
Gross unrealized appreciation | 15,500 |  |
Gross unrealized depreciation | 115,100 |  |
Net unrealized appreciation (depreciation) | (99,600) |  |
Taxable Subsidiary |  |  |
Income Tax Contingency [Line Items] |  |  |
Cost of investments | 52,500 |  |
Gross unrealized appreciation | 80,500 |  |
Gross unrealized depreciation | 10,500 |  |
Net unrealized appreciation (depreciation) | $ 70,000 |  |
O 2025 Q2 Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) | $ 0.58 |  |
S 2025 Q2 Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) | $ 0.06 |  |
O 2025 Q1 Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) |  | 0.57 |
S 2025 Q1 Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) |  | $ 0.06 |
O 2024 Q4 Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) |  |  | $ 0.57
S 2024 Q4 Dividends |  |  |
Income Tax Contingency [Line Items] |  |  |
Dividends declared (in usd per share) |  |  | $ 0.06

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