CONSOLIDATED SCHEDULE OF INVESTMENTS (Parenthetical 2) - USD ($) $ in Thousands |
3 Months Ended |
12 Months Ended |
Mar. 31, 2024 |
Dec. 31, 2023 |
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 1,829,575
|
|
$ 1,904,895
|
|
Investments, at fair value |
1,784,893
|
[1] |
1,841,881
|
[2] |
Australia |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
5,029
|
|
5,023
|
|
Investments, at fair value |
5,150
|
|
5,139
|
|
Canada |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
50,822
|
|
50,490
|
|
Investments, at fair value |
52,008
|
|
51,711
|
|
Luxembourg |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
42,119
|
|
41,755
|
|
Investments, at fair value |
40,165
|
|
40,095
|
|
Sweden |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
1,168
|
|
1,168
|
|
Investments, at fair value |
266
|
|
395
|
|
United Kingdom |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
79,469
|
|
75,844
|
|
Investments, at fair value |
76,711
|
|
73,713
|
|
United States |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
1,650,968
|
|
1,730,615
|
|
Investments, at fair value |
$ 1,610,593
|
|
$ 1,670,828
|
|
Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
100.00%
|
|
100.00%
|
|
Investments at fair value | Geographic concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
100.00%
|
|
100.00%
|
|
Investments at fair value | Geographic concentration | Australia |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.30%
|
|
0.30%
|
|
Investments at fair value | Geographic concentration | Canada |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
2.90%
|
|
2.80%
|
|
Investments at fair value | Geographic concentration | Luxembourg |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
2.30%
|
|
2.20%
|
|
Investments at fair value | Geographic concentration | Sweden |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.00%
|
|
0.00%
|
|
Investments at fair value | Geographic concentration | United Kingdom |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
4.30%
|
|
4.00%
|
|
Investments at fair value | Geographic concentration | United States |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
90.20%
|
|
90.70%
|
|
Aerospace & Defense |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 108,530
|
|
$ 110,041
|
|
Investments, at fair value |
$ 101,054
|
|
$ 102,939
|
|
Aerospace & Defense | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
5.70%
|
|
5.60%
|
|
Automotive |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 76,210
|
|
$ 75,867
|
|
Investments, at fair value |
$ 74,691
|
|
$ 74,333
|
|
Automotive | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
4.20%
|
|
4.00%
|
|
Beverage & Food |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 49,671
|
|
$ 63,382
|
|
Investments, at fair value |
$ 46,906
|
|
$ 60,198
|
|
Beverage & Food | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
2.60%
|
|
3.30%
|
|
Business Services |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 98,297
|
|
$ 108,056
|
|
Investments, at fair value |
$ 99,739
|
|
$ 108,862
|
|
Business Services | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
5.60%
|
|
5.90%
|
|
Capital Equipment |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 42,622
|
|
$ 42,256
|
|
Investments, at fair value |
$ 46,831
|
|
$ 45,687
|
|
Capital Equipment | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
2.60%
|
|
2.50%
|
|
Chemicals, Plastics & Rubber |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 69,265
|
|
$ 69,178
|
|
Investments, at fair value |
$ 67,970
|
|
$ 67,344
|
|
Chemicals, Plastics & Rubber | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
3.80%
|
|
3.70%
|
|
Construction & Building |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 29,966
|
|
$ 25,825
|
|
Investments, at fair value |
$ 30,375
|
|
$ 26,014
|
|
Construction & Building | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
1.70%
|
|
1.40%
|
|
Consumer Goods: Durable |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 4,754
|
|
$ 5,373
|
|
Investments, at fair value |
$ 4,621
|
|
$ 5,552
|
|
Consumer Goods: Durable | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.30%
|
|
0.30%
|
|
Consumer Goods: Non-Durable |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 7,057
|
|
$ 7,062
|
|
Investments, at fair value |
$ 7,308
|
|
$ 7,244
|
|
Consumer Goods: Non-Durable | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.40%
|
|
0.40%
|
|
Consumer Services |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 93,716
|
|
$ 82,904
|
|
Investments, at fair value |
$ 91,725
|
|
$ 80,668
|
|
Consumer Services | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
5.10%
|
|
4.40%
|
|
Containers, Packaging & Glass |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 46,951
|
|
$ 46,473
|
|
Investments, at fair value |
$ 40,982
|
|
$ 40,285
|
|
Containers, Packaging & Glass | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
2.30%
|
|
2.20%
|
|
Diversified Financial Services |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 94,771
|
|
$ 90,796
|
|
Investments, at fair value |
$ 94,943
|
|
$ 91,535
|
|
Diversified Financial Services | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
5.30%
|
|
5.00%
|
|
Energy: Oil & Gas |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 12,332
|
|
$ 11,972
|
|
Investments, at fair value |
$ 12,928
|
|
$ 12,341
|
|
Energy: Oil & Gas | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.70%
|
|
0.70%
|
|
Environmental Industries |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 42,826
|
|
$ 39,572
|
|
Investments, at fair value |
$ 42,950
|
|
$ 39,682
|
|
Environmental Industries | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
2.40%
|
|
2.20%
|
|
Healthcare & Pharmaceuticals |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 215,340
|
|
$ 239,647
|
|
Investments, at fair value |
$ 212,015
|
|
$ 213,649
|
|
Healthcare & Pharmaceuticals | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
12.00%
|
|
11.60%
|
|
High Tech Industries |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 134,495
|
|
$ 136,374
|
|
Investments, at fair value |
$ 135,440
|
|
$ 137,378
|
|
High Tech Industries | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
7.60%
|
|
7.50%
|
|
Investment Funds |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 271,097
|
|
$ 271,097
|
|
Investments, at fair value |
$ 248,598
|
|
$ 249,379
|
|
Investment Funds | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
13.90%
|
|
13.40%
|
|
Leisure Products & Services |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 83,673
|
|
$ 130,116
|
|
Investments, at fair value |
$ 79,385
|
|
$ 131,916
|
|
Leisure Products & Services | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
4.50%
|
|
7.20%
|
|
Media: Advertising, Printing & Publishing |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 43,177
|
|
$ 44,362
|
|
Investments, at fair value |
$ 43,650
|
|
$ 44,530
|
|
Media: Advertising, Printing & Publishing | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
2.40%
|
|
2.40%
|
|
Retail |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 24,463
|
|
$ 29,558
|
|
Investments, at fair value |
$ 24,885
|
|
$ 29,993
|
|
Retail | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
1.40%
|
|
1.60%
|
|
Software |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 170,460
|
|
$ 166,536
|
|
Investments, at fair value |
$ 172,102
|
|
$ 168,106
|
|
Software | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
9.60%
|
|
9.10%
|
|
Sovereign & Public Finance |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 78
|
|
$ 78
|
|
Investments, at fair value |
$ 80
|
|
$ 79
|
|
Sovereign & Public Finance | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.00%
|
|
0.00%
|
|
Telecommunications |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 79,915
|
|
$ 78,772
|
|
Investments, at fair value |
$ 75,697
|
|
$ 74,499
|
|
Telecommunications | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
4.20%
|
|
4.00%
|
|
Transportation: Cargo |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 9,770
|
|
$ 9,430
|
|
Investments, at fair value |
$ 9,284
|
|
$ 9,128
|
|
Transportation: Cargo | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.50%
|
|
0.50%
|
|
Utilities: Electric |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 920
|
|
$ 920
|
|
Investments, at fair value |
$ 910
|
|
$ 902
|
|
Utilities: Electric | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
0.10%
|
|
0.00%
|
|
Wholesale |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Amortized cost |
$ 19,219
|
|
$ 19,248
|
|
Investments, at fair value |
$ 19,824
|
|
$ 19,638
|
|
Wholesale | Investments at fair value | Industry concentration |
|
|
|
|
Schedule of Investments [Line Items] |
|
|
|
|
Concentration risk percentage |
1.10%
|
|
1.10%
|
|
|
|