Allowance for Credit Losses - Schedule of Allowance for Credit Losses in Investment in Leases, Loans, Securities and Other Assets (Details) - USD ($) $ in Thousands |
9 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Dec. 31, 2024 |
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| Amortized Cost | ||||||||
| Investments in leases - sales-type | $ 25,652,968 | $ 24,625,749 | ||||||
| Other assets – sales-type sub-leases | 860,599 | 862,845 | ||||||
| Total | 49,777,270 | 47,537,444 | ||||||
| Allowance | ||||||||
| Investments in leases - sales-type | (1,282,396) | (919,186) | ||||||
| Allowance, total | (2,356,019) | (1,769,355) | ||||||
| Net Investment | ||||||||
| Investments in leases - sales-type | [1] | 24,370,572 | 23,706,563 | |||||
| Other assets – sales-type sub-leases | 830,895 | 838,936 | ||||||
| Net investment total | $ 47,421,251 | $ 45,768,089 | ||||||
| Allowance as a % of Amortized Cost | ||||||||
| Investments in leases - sales-type | 5.00% | 3.73% | ||||||
| Other assets – sales-type sub-leases | 3.45% | 2.77% | ||||||
| Allowance as a percentage of amortized cost, total | 4.73% | 3.72% | ||||||
| CECL allowance for unfunded commitments | $ 27,666 | $ 6,398 | ||||||
| Financing Sub-Lease Commitments | ||||||||
| Allowance | ||||||||
| Other assets – sales-type sub-leases | (29,704) | (23,909) | ||||||
| Investments in leases - financing receivables, net | ||||||||
| Amortized Cost | ||||||||
| Investments in leases, loans and securities | 20,120,668 | 19,467,011 | ||||||
| Allowance | ||||||||
| Investments in leases, loans and securities | (884,894) | (769,878) | ||||||
| Net Investment | ||||||||
| Investments in leases, loans and securities | [1] | $ 19,235,774 | $ 18,697,133 | |||||
| Allowance as a % of Amortized Cost | ||||||||
| Investments in leases, loans and securities | 4.40% | 3.95% | ||||||
| Investments in loans and securities, net | ||||||||
| Amortized Cost | ||||||||
| Investments in leases, loans and securities | $ 3,143,035 | $ 2,581,839 | ||||||
| Allowance | ||||||||
| Investments in leases, loans and securities | (159,025) | (56,382) | ||||||
| Net Investment | ||||||||
| Investments in leases, loans and securities | $ 2,984,010 | [1] | $ 2,525,457 | [1] | $ 2,432,999 | $ 1,651,533 | ||
| Allowance as a % of Amortized Cost | ||||||||
| Investments in leases, loans and securities | 5.06% | 2.18% | ||||||
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