Derivative Financial Instruments and Hedging Activities - Weighted Average Remaining Maturity, Lives, and Rates of Interest Rate Swaps (Details) - Interest Rate Swap - USD ($) |
6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Cash Flow Hedging | ||||
| Derivative [Line Items] | ||||
| Derivative, Notional Amount | $ 615,000,000.0 | |||
| Financial Institution Counterparties | Derivatives designated as non-hedging instruments | ||||
| Derivative [Line Items] | ||||
| Derivative, Notional Amount | [1] | $ 893,244,000 | $ 706,372,000 | |
| Remaining Maturity | 3 years 9 months 18 days | 4 years 1 month 6 days | ||
| Weighted Average Receive Rate | 3.67% | 3.92% | ||
| Weighted Average Pay Rate | 3.59% | 3.54% | ||
| Financial Institution Counterparties | Cash Flow Hedging | Derivatives designated as hedging instruments | ||||
| Derivative [Line Items] | ||||
| Derivative, Notional Amount | [1] | $ 615,000,000 | $ 860,000,000 | |
| Remaining Maturity | 1 year 3 months 18 days | 1 year 3 months 18 days | ||
| Weighted Average Receive Rate | 3.66% | 3.83% | ||
| Weighted Average Pay Rate | 3.43% | 3.20% | ||
| Financial Institution Counterparties | Fair Value Hedging | Derivatives designated as hedging instruments | ||||
| Derivative [Line Items] | ||||
| Derivative, Notional Amount | [1] | $ 358,110,000 | $ 480,110,000 | |
| Remaining Maturity | 2 years 1 month 6 days | 1 year 4 months 24 days | ||
| Weighted Average Receive Rate | 3.63% | 3.78% | ||
| Weighted Average Pay Rate | 3.47% | 3.47% | ||
| Customer Counterparties | Derivatives designated as non-hedging instruments | ||||
| Derivative [Line Items] | ||||
| Derivative, Notional Amount | [1] | $ 893,244,000 | $ 706,372,000 | |
| Remaining Maturity | 3 years 9 months 18 days | 4 years 1 month 6 days | ||
| Weighted Average Receive Rate | 3.59% | 3.54% | ||
| Weighted Average Pay Rate | 3.67% | 3.92% | ||
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