LOANS AND ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($) |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Interest income on nonaccrual loans | $ 0 | $ 0 | |
| Loans, net of unearned income | $ 22,177,865,000 | $ 21,513,522,000 | |
| Financing receivable, moody's upside scenario in weighted percentage | 50.00% | 50.00% | |
| Unfunded Loan Commitments | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Modified loans | $ 2,100,000 | $ 2,000,000.0 | |
| Risk Grade Nine | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Loans, net of unearned income | 0 | 0 | |
| Loan Receivables | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Accrued interest receivable | $ 81,200,000 | $ 80,000,000.0 | |