Investment Securities - Narrative (Details) |
3 Months Ended | |
|---|---|---|
|
Dec. 31, 2025
USD ($)
security
|
Jun. 30, 2026
USD ($)
security
|
|
| Investments, Debt and Equity Securities [Abstract] | ||
| Held to maturity, amortized cost | $ 0 | |
| Debt securities, available-for-sale, sold at par value | $ 593,200,000 | |
| Loss on sale of securities, before tax | $ 69,500,000 | |
| Number of investment securities in unrealized loss position | security | 114 | 194 |
| Number of investment securities in unrealized loss position longer than 12 months | security | 67 | |
| Number of investment securities in unrealized loss position less than 12 months | security | 127 | |
| Debt securities, available-for-sale unrealized loss position, allowance for credit loss | $ 0 | $ 0 |