Investments - Industry Composition of Investments at Fair Value (Details) - USD ($)
$ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 25,007,853
|
$ 25,337,420
|
| % of Total Investments at Fair Value |
100.00%
|
100.00%
|
| Aerospace & Defense |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 1,556,344
|
$ 1,301,763
|
| % of Total Investments at Fair Value |
6.22%
|
5.13%
|
| Air Freight & Logistics |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 84,879
|
$ 85,553
|
| % of Total Investments at Fair Value |
0.34%
|
0.34%
|
| Asset Based Lending and Fund Finance |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 117,751
|
$ 124,203
|
| % of Total Investments at Fair Value |
0.47%
|
0.49%
|
| Automobile Components |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 177,345
|
$ 290,110
|
| % of Total Investments at Fair Value |
0.71%
|
1.14%
|
| Beverages |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 97,638
|
$ 97,885
|
| % of Total Investments at Fair Value |
0.39%
|
0.39%
|
| Broadline Retail |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 25,304
|
$ 24,963
|
| % of Total Investments at Fair Value |
0.10%
|
0.10%
|
| Building Products |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 264,197
|
$ 268,827
|
| % of Total Investments at Fair Value |
1.05%
|
1.06%
|
| Capital Markets |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 345,860
|
$ 341,877
|
| % of Total Investments at Fair Value |
1.38%
|
1.35%
|
| Chemicals |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 164,252
|
$ 167,441
|
| % of Total Investments at Fair Value |
0.66%
|
0.66%
|
| Commercial Services & Supplies |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 1,244,800
|
$ 1,231,788
|
| % of Total Investments at Fair Value |
4.98%
|
4.86%
|
| Communications Equipment |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 54,212
|
$ 55,553
|
| % of Total Investments at Fair Value |
0.22%
|
0.22%
|
| Construction & Engineering |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 118,124
|
$ 119,092
|
| % of Total Investments at Fair Value |
0.47%
|
0.47%
|
| Consumer Finance |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 21,947
|
$ 25,681
|
| % of Total Investments at Fair Value |
0.09%
|
0.10%
|
| Consumer Staples Distribution & Retail |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 514,425
|
$ 522,725
|
| % of Total Investments at Fair Value |
2.06%
|
2.06%
|
| Containers & Packaging |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 197,249
|
$ 200,903
|
| % of Total Investments at Fair Value |
0.79%
|
0.79%
|
| Distributors |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 7,729
|
$ 14,157
|
| % of Total Investments at Fair Value |
0.03%
|
0.06%
|
| Diversified Consumer Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 781,804
|
$ 767,302
|
| % of Total Investments at Fair Value |
3.12%
|
3.03%
|
| Diversified Telecommunication Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 16,658
|
$ 17,123
|
| % of Total Investments at Fair Value |
0.07%
|
0.07%
|
| Electric Utilities |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 76,753
|
$ 77,049
|
| % of Total Investments at Fair Value |
0.31%
|
0.30%
|
| Electrical Equipment |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 126,980
|
$ 127,336
|
| % of Total Investments at Fair Value |
0.51%
|
0.50%
|
| Electronic Equipment, Instruments & Components |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 251,855
|
$ 268,724
|
| % of Total Investments at Fair Value |
1.01%
|
1.06%
|
| Energy Equipment & Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 72,217
|
$ 72,426
|
| % of Total Investments at Fair Value |
0.29%
|
0.29%
|
| Entertainment |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 550,663
|
$ 585,906
|
| % of Total Investments at Fair Value |
2.20%
|
2.31%
|
| Financial Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 1,565,064
|
$ 1,401,386
|
| % of Total Investments at Fair Value |
6.26%
|
5.53%
|
| Food Products |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 178,073
|
$ 176,572
|
| % of Total Investments at Fair Value |
0.71%
|
0.70%
|
| Gas Utilities |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 38,968
|
$ 39,404
|
| % of Total Investments at Fair Value |
0.15%
|
0.16%
|
| Health Care Equipment & Supplies |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 986,594
|
$ 993,028
|
| % of Total Investments at Fair Value |
3.95%
|
3.92%
|
| Health Care Providers & Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 3,284,678
|
$ 3,170,872
|
| % of Total Investments at Fair Value |
13.13%
|
12.50%
|
| Health Care Technology |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 109,164
|
$ 110,869
|
| % of Total Investments at Fair Value |
0.44%
|
0.44%
|
| Hotels, Restaurants & Leisure |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 830,250
|
$ 820,147
|
| % of Total Investments at Fair Value |
3.32%
|
3.24%
|
| Household Durables |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 67,755
|
$ 67,521
|
| % of Total Investments at Fair Value |
0.27%
|
0.27%
|
| Independent Power and Renewable Electricity Producers |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 300,162
|
$ 286,297
|
| % of Total Investments at Fair Value |
1.20%
|
1.13%
|
| Insurance |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 616,378
|
$ 677,379
|
| % of Total Investments at Fair Value |
2.46%
|
2.67%
|
| Interactive Media & Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 194,249
|
$ 148,774
|
| % of Total Investments at Fair Value |
0.78%
|
0.59%
|
| Investments in Joint Ventures |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 426,214
|
$ 416,244
|
| % of Total Investments at Fair Value |
1.70%
|
1.64%
|
| IT Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 476,174
|
$ 488,782
|
| % of Total Investments at Fair Value |
1.90%
|
1.93%
|
| Life Sciences Tools & Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 894,910
|
$ 890,883
|
| % of Total Investments at Fair Value |
3.58%
|
3.52%
|
| Machinery |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 323,734
|
$ 306,321
|
| % of Total Investments at Fair Value |
1.29%
|
1.21%
|
| Media |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 236,820
|
$ 406,502
|
| % of Total Investments at Fair Value |
0.95%
|
1.60%
|
| Metals & Mining |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 211,859
|
$ 213,890
|
| % of Total Investments at Fair Value |
0.85%
|
0.84%
|
| Multi-Utilities |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 4,336
|
$ 4,289
|
| % of Total Investments at Fair Value |
0.02%
|
0.02%
|
| Oil, Gas & Consumable Fuels |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 832
|
$ 3,471
|
| % of Total Investments at Fair Value |
0.00%
|
0.01%
|
| Personal Care Products |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 182,518
|
$ 186,685
|
| % of Total Investments at Fair Value |
0.73%
|
0.74%
|
| Pharmaceuticals |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 649,742
|
$ 623,138
|
| % of Total Investments at Fair Value |
2.60%
|
2.46%
|
| Professional Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 1,018,906
|
$ 1,030,406
|
| % of Total Investments at Fair Value |
4.07%
|
4.07%
|
| Real Estate Management & Development |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 102,060
|
$ 103,592
|
| % of Total Investments at Fair Value |
0.41%
|
0.41%
|
| Semiconductors & Semiconductor Equipment |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 11,772
|
$ 12,076
|
| % of Total Investments at Fair Value |
0.05%
|
0.05%
|
| Software |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 4,344,840
|
$ 4,772,683
|
| % of Total Investments at Fair Value |
17.37%
|
18.83%
|
| Specialty Retail |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 339,195
|
$ 378,996
|
| % of Total Investments at Fair Value |
1.36%
|
1.50%
|
| Structured Finance |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 84,203
|
$ 88,664
|
| % of Total Investments at Fair Value |
0.34%
|
0.35%
|
| Textiles, Apparel & Luxury Goods |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 60,062
|
$ 54,864
|
| % of Total Investments at Fair Value |
0.24%
|
0.22%
|
| Trading Companies & Distributors |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 281,636
|
$ 282,786
|
| % of Total Investments at Fair Value |
1.13%
|
1.12%
|
| Transportation Infrastructure |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 84,973
|
$ 86,929
|
| % of Total Investments at Fair Value |
0.34%
|
0.34%
|
| Wireless Telecommunication Services |
|
|
| Schedule of Investments [Line Items] |
|
|
| Fair Value |
$ 232,746
|
$ 305,583
|
| % of Total Investments at Fair Value |
0.93%
|
1.21%
|