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Accumulated Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Other comprehensive income (loss), Pre-tax Amount | $ (36,187) |  |  |  | $ (55,739) |  |  |  | $ (32,134) |  | $ (172,060) |
Other comprehensive income (loss), Tax Effect | (9,270) |  |  |  | (14,281) |  |  |  | (8,232) |  | (44,084) |
Total other comprehensive loss, net of tax | (26,917) |  | $ (7,100) | $ 10,115 | (41,458) |  | $ (32,631) | $ (53,887) | (23,902) |  | (127,976) |
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Including Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive loss, before Reclassifications, Pre-tax Amount | (36,914) |  |  |  | (57,655) |  |  |  | (34,279) |  | (177,638) |
Reclassification, Pre-tax Amount | 16 | [1] |  |  | 23 | [2] |  |  | 51 | [1] | 95 | [2]
Other comprehensive income (loss), Pre-tax Amount | (36,898) |  |  |  | (57,632) |  |  |  | (34,228) |  | (177,543) |
Other comprehensive income (loss), before Reclassifications, Tax Effect | (9,457) |  |  |  | (14,773) |  |  |  | (8,782) |  | (45,514) |
Reclassification, Tax Effect | 4 | [1] |  |  | 7 | [2] |  |  | 13 | [1] | 25 | [2]
Other comprehensive income (loss), Tax Effect | (9,453) |  |  |  | (14,766) |  |  |  | (8,769) |  | (45,489) |
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount | (27,457) |  |  |  | (42,882) |  |  |  | (25,497) |  | (132,124) |
Reclassification, Net of tax amount | 12 | [1] |  |  | 16 | [2] |  |  | 38 | [1] | 70 | [2]
Total other comprehensive loss, net of tax | (27,445) |  |  |  | (42,866) |  |  |  | (25,459) |  | (132,054) |
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | 518 |  |  |  | 1,829 |  |  |  | 1,514 |  | 5,291 |
Other comprehensive income (loss), Tax Effect | 133 |  |  |  | 469 |  |  |  | 388 |  | 1,356 |
Total other comprehensive loss, net of tax | 385 |  |  |  | 1,360 |  |  |  | 1,126 |  | 3,935 |
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | (123) |  |  |  | 0 |  |  |  | (368) |  | 0 |
Other comprehensive income (loss), Tax Effect | (31) |  |  |  | 0 |  |  |  | (94) |  | 0 |
Total other comprehensive loss, net of tax | (92) |  |  |  | 0 |  |  |  | (274) |  | 0 |
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | 316 |  |  |  | 64 |  |  |  | 948 |  | 192 |
Other comprehensive income (loss), Tax Effect | 81 |  |  |  | 16 |  |  |  | 243 |  | 49 |
Total other comprehensive loss, net of tax | 235 |  |  |  | 48 |  |  |  | 705 |  | 143 |
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | 193 |  |  |  | 64 |  |  |  | 580 |  | 192 |
Other comprehensive income (loss), Tax Effect | 50 |  |  |  | 16 |  |  |  | 149 |  | 49 |
Total other comprehensive loss, net of tax | $ 143 |  |  |  | $ 48 |  |  |  | $ 431 |  | $ 143 |
[1] | Includes amounts related to the amortization/accretion of unrealized net gains and losses related to the Company’s reclassification of available for sale investment securities to the held to maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.
[2] | Includes amounts related to the amortization/accretion of unrealized net gains and losses related to the Company’s reclassification of available for sale investment securities to the held to maturity category. The unrealized net gains/losses will be amortized/accreted over the remaining life of the investment securities as an adjustment of yield.

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