v3.26.3
Variable Interest Entities (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Subordinated Borrowing [Line Items]          
Federal tax credits recognized in tax expense $ 1,130 $ 950 $ 3,380 $ 2,860  
Investment tax credits 11,890 4,680 14,690 19,020  
Investment carrying amount 9,342,357   9,342,357   $ 9,055,270
Unfunded capital and other commitments 7,991,826   7,991,826   7,737,180
Maximum exposure to loss, unconsolidated VIEs 85,203   85,203   84,442
Variable Interest Entity [Line Items]          
Investment carrying amount 9,342,357   9,342,357   9,055,270
Investment tax credits 11,890 $ 4,680 14,690 $ 19,020  
Variable interest entity, primary beneficiary          
Subordinated Borrowing [Line Items]          
Investment carrying amount 34,290   34,290   47,870
Unfunded capital and other commitments 0   0   0
Variable Interest Entity [Line Items]          
Investment carrying amount 34,290   34,290   47,870
Variable interest entity, not primary beneficiary          
Subordinated Borrowing [Line Items]          
Investment carrying amount 93,056   93,056   72,390
Unfunded capital and other commitments 79,322   79,322   57,989
Variable Interest Entity [Line Items]          
Investment carrying amount $ 93,056   $ 93,056   $ 72,390