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Accumulated Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Other comprehensive income (loss), Pre-tax Amount | $ (43,870) |  |  | $ 6,236 |  |  | $ (116,321) |  | $ (10,839) |
Other comprehensive income (loss), Tax Effect | (11,239) |  |  | 1,598 |  |  | (29,803) |  | (2,777) |
Total other comprehensive (loss) income, net of tax | (32,631) |  | $ (53,887) | 4,638 |  | $ (12,700) | (86,518) |  | (8,062) |
Securities Available for Sale and Transferred Securities [Member] |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), before Reclassifications, Pre-tax Amount | (44,966) |  |  | 6,661 |  |  | (119,983) |  | (12,701) |
Reclassification, Pre-tax Amount | 41 | [1] |  | 64 | [2] |  | 72 | [1] | 63 | [2]
Other comprehensive income (loss), Pre-tax Amount | (44,925) |  |  | 6,725 |  |  | 119,911 |  | (12,638) |
Other comprehensive income (loss), before Reclassifications, Tax Effect | (11,520) |  |  | 1,707 |  |  | (30,741) |  | (3,254) |
Reclassification, Tax Effect | 10 | [1] |  | 16 | [2] |  | 18 | [1] | 16 | [2]
Other comprehensive income (loss), Tax Effect | (11,510) |  |  | 1,723 |  |  | 30,723 |  | (3,238) |
Other comprehensive income (loss), before Reclassifications, Net-of-tax Amount | (33,446) |  |  | 4,954 |  |  | (89,242) |  | (9,447) |
Reclassification, Net of tax amount | 31 | [1] |  | 48 | [2] |  | 54 | [1] | 47 | [2]
Total other comprehensive (loss) income, net of tax | (33,415) |  |  | 5,002 |  |  | 89,188 |  | (9,400) |
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | 991 |  |  | (674) |  |  | 3,462 |  | 1,429 |
Other comprehensive income (loss), Tax Effect | 254 |  |  | (173) |  |  | 887 |  | 366 |
Total other comprehensive (loss) income, net of tax | 737 |  |  | (501) |  |  | 2,575 |  | 1,063 |
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | 0 |  |  | 0 |  |  | 0 |  | (1) |
Other comprehensive income (loss), Tax Effect | 0 |  |  | 0 |  |  | 0 |  | 0 |
Total other comprehensive (loss) income, net of tax | 0 |  |  | 0 |  |  | 0 |  | (1) |
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | 64 |  |  | 185 |  |  | 128 |  | 371 |
Other comprehensive income (loss), Tax Effect | 17 |  |  | 48 |  |  | 33 |  | 95 |
Total other comprehensive (loss) income, net of tax | 47 |  |  | 137 |  |  | 95 |  | 276 |
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), Pre-tax Amount | 64 |  |  | 185 |  |  | 128 |  | 370 |
Other comprehensive income (loss), Tax Effect | 17 |  |  | 48 |  |  | 33 |  | 95 |
Total other comprehensive (loss) income, net of tax | $ 47 |  |  | $ 137 |  |  | $ 95 |  | $ 275 |
[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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