Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Investments - Schedule of Changes in the Fair Value of Investments (Details)

v3.22.2.2
Fair Value of Investments - Schedule of Changes in the Fair Value of Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
First-lien senior secured debt investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period $ 9,242,688 $ 9,067,137 $ 9,539,774 $ 8,389,486
Purchases of investments, net 1,233,610 2,509,627 4,157,703 4,118,038
Payment-in-kind 19,822 6,170 64,774 24,643
Proceeds from investments, net (1,279,615) (2,283,113) (4,432,479) (3,311,548)
Net amortization/accretion of premium/discount on investments 8,946 21,421 29,227 44,430
Transfers into (out of) Level 3 0 0 (514) 847
Fair value, end of period 9,263,764 9,322,053 9,263,764 9,322,053
First-lien senior secured debt investments | Net change in unrealized gain (loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 37,819 (1,170) (95,391) 53,619
First-lien senior secured debt investments | Net realized gains (losses)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 494 1,981 670 2,538
Second-lien senior secured debt investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 1,763,979 1,960,154 1,921,447 1,949,703
Purchases of investments, net 36,326 70,480 337,290 487,457
Payment-in-kind 1,948 0 7,689 0
Proceeds from investments, net (11,688) (278,636) (335,797) (705,356)
Net amortization/accretion of premium/discount on investments 811 3,414 2,751 10,624
Transfers into (out of) Level 3 (32,689) 0 (101,661) 0
Fair value, end of period 1,750,922 1,755,654 1,750,922 1,755,654
Second-lien senior secured debt investments | Net change in unrealized gain (loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) (7,765) 205 (80,797) 43,407
Second-lien senior secured debt investments | Net realized gains (losses)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 0 37 0 (30,181)
Unsecured debt investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 269,752 194,928 196,485 59,562
Purchases of investments, net 0 0 89,239 130,137
Payment-in-kind 6,224 7,250 15,002 9,542
Proceeds from investments, net (22,512) 0 (22,512) 0
Net amortization/accretion of premium/discount on investments 119 74 312 233
Transfers into (out of) Level 3 0 0 0 0
Fair value, end of period 237,375 194,712 237,375 194,712
Unsecured debt investments | Net change in unrealized gain (loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) (14,343) (7,540) (39,286) (4,762)
Unsecured debt investments | Net realized gains (losses)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) (1,865) 0 (1,865) 0
Preferred equity investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 296,766 174,335 260,869 22,157
Purchases of investments, net 24,302 0 98,241 148,832
Payment-in-kind 3,872 3,446 13,303 6,778
Proceeds from investments, net 0 (1,000) (33,693) (1,000)
Net amortization/accretion of premium/discount on investments 216 156 1,182 283
Transfers into (out of) Level 3 0 0 0 0
Fair value, end of period 329,451 179,769 329,451 179,769
Preferred equity investments | Net change in unrealized gain (loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 4,295 2,832 (14,933) 2,719
Preferred equity investments | Net realized gains (losses)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 0 0 4,482 0
Common equity investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 730,326 331,058 571,616 230,307
Purchases of investments, net 51,092 140,794 330,519 291,064
Payment-in-kind 159 144 467 381
Proceeds from investments, net (8,575) (61,551) (137,306) (133,551)
Net amortization/accretion of premium/discount on investments 0 0 0 0
Transfers into (out of) Level 3 0 0 0 0
Fair value, end of period 843,979 427,187 843,979 427,187
Common equity investments | Net change in unrealized gain (loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 70,977 16,761 78,683 39,345
Common equity investments | Net realized gains (losses)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 0 (19) 0 (359)
Total        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value, beginning of period 12,303,511 11,727,612 12,490,191 10,651,215
Purchases of investments, net 1,345,330 2,720,901 5,012,992 5,175,528
Payment-in-kind 32,025 17,010 101,235 41,344
Proceeds from investments, net (1,322,390) (2,624,300) (4,961,787) (4,151,455)
Net amortization/accretion of premium/discount on investments 10,092 25,065 33,472 55,570
Transfers into (out of) Level 3 (32,689) 0 (102,175) 847
Fair value, end of period 12,425,491 11,879,375 12,425,491 11,879,375
Total | Net change in unrealized gain (loss)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) 90,983 11,088 (151,724) 134,328
Total | Net realized gains (losses)        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Net change in unrealized gain (loss) / realized gain (loss) $ (1,371) $ 1,999 $ 3,287 $ (28,002)