Derivative Financial Instruments - Summary of Interest Rate Swaps Designated as Cash Flow Hedges (Detail) - Interest Rate Swaps [Member] - Designated as Hedging Instrument [Member] |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Subordinated Note Hedges [Member] | ||
| Derivative [Line Items] | ||
| Weighted average Maturity in years | 9 years 6 months | 9 years 8 months 12 days |
| Weighted average pay rate | 2.81% | 2.81% |
| Weighted average receive rate | 5.78% | 6.10% |
| Variable Rate FHLB Advance Hedges [Member] | ||
| Derivative [Line Items] | ||
| Weighted average Maturity in years | 2 months 12 days | |
| Weighted average pay rate | 3.59% | |
| Weighted average receive rate | 3.71% | |
| Cash Flow Hedges [Member] | ||
| Derivative [Line Items] | ||
| Weighted average Maturity in years | 9 years 6 months | 10 months 24 days |
| Weighted average pay rate | 2.81% | 3.53% |
| Weighted average receive rate | 5.78% | 3.88% |