Fair Value - Fair Value Levels (Details) - USD ($)
$ in Thousands |
Mar. 31, 2023 |
Dec. 31, 2022 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
$ 3,270,326
|
$ 3,221,247
|
| First lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
1,798,746
|
1,753,967
|
| Second lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
562,413
|
561,207
|
| Subordinated |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
78,282
|
76,659
|
| Equity and other |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
830,885
|
829,414
|
| Level I |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
0
|
0
|
| Level I | First lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
0
|
0
|
| Level I | Second lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
0
|
0
|
| Level I | Subordinated |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
0
|
0
|
| Level I | Equity and other |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
0
|
0
|
| Level II |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
85,949
|
84,956
|
| Level II | First lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
0
|
0
|
| Level II | Second lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
82,015
|
81,139
|
| Level II | Subordinated |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
3,934
|
3,817
|
| Level II | Equity and other |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
0
|
0
|
| Level III |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
3,184,377
|
3,136,291
|
| Level III | First lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
1,798,746
|
1,753,967
|
| Level III | Second lien |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
480,398
|
480,068
|
| Level III | Subordinated |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
74,348
|
72,842
|
| Level III | Equity and other |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Total investments |
$ 830,885
|
$ 829,414
|