CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Statement of Comprehensive Income [Abstract] | ||||
| Net unrealized gains (losses) arising during the period, net of tax expense (benefit) | $ (39,346) | $ 14,019 | $ (44,834) | $ 43,301 |
| Amortization of unrealized losses on securities reclassified to held-to-maturity, tax expense | 957 | 1,063 | 2,779 | 3,103 |
| Change in unfunded post-retirement liability related to unrealized gain and prior service cost, net of tax benefit | (27) | (20) | (237) | (58) |
| Net unrealized (loss) gain arising during the period, net of tax (benefit) expense | (3,025) | (68) | (5,656) | 1,295 |
| Net change in other comprehensive loss of equity method investments, net of tax benefit | $ (3) | $ (7) | $ (26) | $ (213) |