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Accumulated Other Comprehensive Loss (Components of Comprehensive Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Net unrealized gains (losses), before tax | $ (9,447) |  |  | $ (361) |  |  | $ (34,845) | $ 179 |
Income tax benefit/(expense) related to other comprehensive income | 2,529 |  |  | 97 |  |  | 9,325 | (48) |
Other comprehensive (loss)/income, net of tax | (6,918) | $ (9,009) | $ (9,593) | (264) | $ 4,730 | $ (4,335) | (25,520) | 131 |
Pension [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments | (3,537) |  |  | (951) |  |  |  |  |
Net unrealized gains (losses), before tax | (3,258) |  |  | (579) |  |  |  |  |
Unrealized tax (expense) benefit | 945 |  |  | 254 |  |  |  |  |
Income tax benefit/(expense) related to other comprehensive income | 871 |  |  | 155 |  |  |  |  |
Unrealized net gains (losses), net of tax | (2,592) |  |  | (697) |  |  |  |  |
Other comprehensive (loss)/income, net of tax | (2,387) |  |  | (424) |  |  |  |  |
SERP [Member] |  |  |  |  |  |  |  |  |
Net unrealized gains (losses), before tax | 68 |  |  |  |  |  |  |  |
Income tax benefit/(expense) related to other comprehensive income | (18) |  |  |  |  |  |  |  |
Other comprehensive (loss)/income, net of tax | 50 |  |  |  |  |  |  |  |
Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] | Pension [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax | (279) |  |  | (372) |  |  |  |  |
Recognized tax (expense) benefit | 74 |  |  | 99 |  |  |  |  |
Recognized gains (losses), net of tax | (205) |  |  | (273) |  |  |  |  |
Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Unrecognized Loss [Member] | SERP [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax | (68) |  |  | (76) |  |  |  |  |
Recognized tax (expense) benefit | 18 |  |  | 20 |  |  |  |  |
Recognized gains (losses), net of tax | (50) |  |  | (56) |  |  |  |  |
Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Prior Service Costs [Member] | SERP [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax |  |  |  | 1 |  |  |  | 1 |
Recognized gains (losses), net of tax |  |  |  | 1 |  |  |  | 1 |
Accumulated Other Comprehensive Loss [Member] |  |  |  |  |  |  |  |  |
Unrealized net gains (losses), net of tax | (7,303) | (9,393) | (9,877) |  |  |  |  |  | $ 409
Recognized gains (losses), net of tax | (385) | (384) | (284) |  |  |  |  |  | (1,140)
Other comprehensive (loss)/income, net of tax | (6,918) | (9,009) | (9,593) | (264) | $ 4,730 | $ (4,335) |  |  |
Investment securities- with OTTI [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments | (199) |  |  | 751 |  |  | (853) | 3,274 |
Recognized gains (losses), before tax | 51 |  |  | 50 |  |  | 152 | 151 |
Net unrealized gains (losses), before tax | (250) |  |  | 701 |  |  | (1,005) | 3,123 |
Unrealized tax (expense) benefit | 53 |  |  | (201) |  |  | 228 | (877) |
Income tax benefit/(expense) related to other comprehensive income | 67 |  |  | (188) |  |  | 269 | (837) |
Unrealized net gains (losses), net of tax | (146) | (582) | 103 | 550 |  |  | (625) | 2,397 | 2,475
Recognized gains (losses), net of tax | 37 | 37 | 37 |  |  |  |  |  | 147
Other comprehensive (loss)/income, net of tax | (183) |  |  | 513 |  |  | (736) | 2,286 |
Investment securities- with OTTI [Member] | Accretable Yield in Income [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax |  |  |  |  |  |  | 152 | 151 |
Recognized tax (expense) benefit |  |  |  |  |  |  | (41) | (40) |
Recognized gains (losses), net of tax |  |  |  |  |  |  | 111 | 111 |
Investment securities- with OTTI [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Accretable Yield in Income [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax | 51 |  |  | 50 |  |  |  |  |
Recognized tax (expense) benefit | (14) |  |  | (13) |  |  |  |  |
Recognized gains (losses), net of tax | 37 |  |  | 37 |  |  |  |  |
Investment securities- all other [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments | (6,768) |  |  | (708) |  |  | (22,971) | (5,035) |
Recognized gains (losses), before tax |  |  |  |  |  |  | 3 | 154 |
Net unrealized gains (losses), before tax | (6,768) |  |  | (708) |  |  | (14,646) | (5,189) |
Unrealized tax (expense) benefit | 1,811 |  |  | 190 |  |  | 6,147 | 1,349 |
Income tax benefit/(expense) related to other comprehensive income | 1,811 |  |  | 190 |  |  | 3,920 | 1,390 |
Unrealized net gains (losses), net of tax | (4,957) |  |  | (518) |  |  | (16,824) | (3,686) |
Other comprehensive (loss)/income, net of tax | (4,957) |  |  | (518) |  |  | (10,726) | (3,799) |
Investment securities- all other [Member] | Recognition of Gains (Losses) In Income [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax |  |  |  |  |  |  | 3 | 154 |
Recognized tax (expense) benefit |  |  |  |  |  |  | (1) | (41) |
Recognized gains (losses), net of tax |  |  |  |  |  |  | 2 | 113 |
Investment Securities HTM [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax | (320) |  |  | 12 |  |  | (644) | (96) |
Net unrealized gains (losses), before tax | 227 |  |  | 42 |  |  | (7,777) | 150 |
Income tax benefit/(expense) related to other comprehensive income | (60) |  |  | (11) |  |  | 2,081 | (40) |
Unrealized net gains (losses), net of tax |  |  | (6,100) |  |  |  |  |  |
Recognized gains (losses), net of tax | (167) | (168) | (69) |  |  |  |  |  | (181)
Other comprehensive (loss)/income, net of tax | 167 |  |  | 31 |  |  | (5,696) | 110 |
Investment Securities HTM [Member] | Recognition of Gains (Losses) In Income [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments |  |  |  | (54) |  |  |  | (54) |
Recognized gains (losses), before tax | 93 |  |  |  |  |  | 93 |  |
Unrealized tax (expense) benefit |  |  |  | 14 |  |  |  | 14 |
Recognized tax (expense) benefit | (25) |  |  |  |  |  | (25) |  |
Unrealized net gains (losses), net of tax |  |  |  | (40) |  |  |  | (40) |
Recognized gains (losses), net of tax | 68 |  |  |  |  |  | 68 |  |
Investment Securities HTM [Member] | Amortization of Recognized Income [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax |  |  |  |  |  |  | (644) | (96) |
Recognized tax (expense) benefit |  |  |  |  |  |  | 172 | 26 |
Recognized gains (losses), net of tax |  |  |  |  |  |  | (472) | (70) |
Investment Securities HTM [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Amortization of Recognized Income [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax | (320) |  |  | 12 |  |  |  |  |
Recognized tax (expense) benefit | 85 |  |  | (3) |  |  |  |  |
Recognized gains (losses), net of tax | (235) |  |  | 9 |  |  |  |  |
Investment Securities Transferred From AFS to HTM [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments |  |  |  |  |  |  | 8,328 |  |
Unrealized tax (expense) benefit |  |  |  |  |  |  | (2,228) |  |
Unrealized net gains (losses), net of tax |  |  |  |  |  |  | 6,100 |  |
Investment Securities Transferred to HTM [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments |  |  |  |  |  |  | (8,328) |  |
Unrealized tax (expense) benefit |  |  |  |  |  |  | 2,228 |  |
Unrealized net gains (losses), net of tax |  |  |  |  |  |  | (6,100) |  |
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments | 534 |  |  | 108 |  |  | 1,622 |  |
Net unrealized gains (losses), before tax |  |  |  |  |  |  |  | 615 |
Unrealized tax (expense) benefit | (142) |  |  | (29) |  |  | (434) |  |
Income tax benefit/(expense) related to other comprehensive income |  |  |  |  |  |  |  | (165) |
Unrealized net gains (losses), net of tax | 392 | 182 | 614 | 79 |  |  |  |  | 635
Other comprehensive (loss)/income, net of tax |  |  |  |  |  |  | 1,188 | 450 |
Adjustment [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments | (3,537) |  |  | (951) |  |  | (14,079) | 139 |
Recognized gains (losses), before tax | (279) |  |  | (372) |  |  | (837) | (1,116) |
Net unrealized gains (losses), before tax | (3,258) |  |  | (579) |  |  | (13,242) | 1,255 |
Adjustment [Member] | Pension [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments |  |  |  |  |  |  | (14,079) | 139 |
Net unrealized gains (losses), before tax |  |  |  |  |  |  | (13,242) | 1,255 |
Unrealized tax (expense) benefit |  |  |  |  |  |  | 3,767 | (37) |
Income tax benefit/(expense) related to other comprehensive income |  |  |  |  |  |  | 3,543 | (336) |
Unrealized net gains (losses), net of tax | (2,592) | (5,069) | (2,651) |  |  |  | (10,312) | 102 | 3,431
Recognized gains (losses), net of tax | (205) | (204) | (204) |  |  |  |  |  | (1,091)
Other comprehensive (loss)/income, net of tax |  |  |  |  |  |  | (9,699) | 919 |
Adjustment [Member] | SERP [Member] |  |  |  |  |  |  |  |  |
Unrealized holding (losses)/gains on investments |  |  |  |  |  |  |  |  |
Net unrealized gains (losses), before tax |  |  |  | 75 |  |  | 203 | 225 |
Unrealized tax (expense) benefit |  |  |  |  |  |  |  |  |
Income tax benefit/(expense) related to other comprehensive income |  |  |  | (20) |  |  | (54) | (60) |
Unrealized net gains (losses), net of tax |  |  |  |  |  |  |  |  | (521)
Recognized gains (losses), net of tax | $ (50) | $ (49) | $ (50) |  |  |  |  |  | $ (128)
Other comprehensive (loss)/income, net of tax |  |  |  | $ 55 |  |  | 149 | 165 |
Adjustment [Member] | Amortization of Unrecognized Loss [Member] | Pension [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax |  |  |  |  |  |  | (837) | (1,116) |
Recognized tax (expense) benefit |  |  |  |  |  |  | 224 | 299 |
Recognized gains (losses), net of tax |  |  |  |  |  |  | (613) | (817) |
Adjustment [Member] | Amortization of Unrecognized Loss [Member] | SERP [Member] |  |  |  |  |  |  |  |  |
Recognized gains (losses), before tax |  |  |  |  |  |  | (203) | (226) |
Recognized tax (expense) benefit |  |  |  |  |  |  | 54 | 60 |
Recognized gains (losses), net of tax |  |  |  |  |  |  | $ (149) | $ (166) |

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