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Accumulated Other Comprehensive Loss ("AOCL") (Components of Comprehensive Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax | $ 828 | $ 2,748
Cash flow hedges: Unrealized holding (losses) gains, Net of Tax | (869) | (858)
Unrealized net actuarial loss, Net of Tax | (2,213) | (2,400)
Other Comprehensive Income, Before Tax Amount | (3,950) | (2,143)
Other Comprehensive Income, Tax (Expense) Benefit | 1,058 | 575
Other Comprehensive (loss) Income, Net | (2,892) | (1,568)
Investment securities- with OTTI [Member] |  |
Available for sale (AFS) securities with OTTI: Unrealized holding (losses) gains, Before Tax Amount | (803) | (679)
Available for sale (AFS) securities with OTTI: Unrealized holding (losses) gains, tax effect | 216 | 182
Available for sale (AFS) securities with OTTI: Unrealized holding (losses) gains, Net of Tax | (587) | (497)
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income, Before Tax Amount | 202 | 200
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income, Tax Effect | (54) | (54)
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income, Net of Tax | 148 | 146
Available for sale (AFS) securities with OTTI: Net unrealized losses on investments with OTTI, Before Tax Amount | (1,005) | (879)
Available for sale (AFS) securities with OTTI: Net unrealized losses on investments with OTTI, Tax Effect | 270 | 236
Available for sale (AFS) securities with OTTI: Net unrealized losses on investments with OTTI, Net of Tax | (735) | (643)
Investment Securities -All Other AFS [Member] |  |
Securities: Unrealized holding gains (losses), Before Tax | 1,765 | 3,753
Securities: Unrealized holding gains (losses), Tax Effect | (474) | (1,005)
Securities: Unrealized holding gains (losses), Net of Tax | 1,291 | 2,748
Less: amortization recognized in income, Before Tax | 632 |
Less: amortization recognized in income, Tax Effect | (169) |
Less: amortization recognized in income, Net of Tax | 463 |
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Before Tax | 1,133 | 3,753
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Tax Effect | (305) | (1,005)
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax | 828 | 2,748
Investment Securities HTM [Member] |  |
Less: amortization recognized in income, Before Tax | (798) | (317)
Less: amortization recognized in income, Tax Effect | 214 | 85
Less: amortization recognized in income, Net of Tax | (584) | (232)
Held to maturity securities: Net unrealized gains on all HTM securities, Before tax | 798 | 317
Held to maturity securities: Net unrealized gains on all HTM securities, Tax | (214) | (85)
Held to maturity securities: Net unrealized gains on all HTM securities, After tax | 584 | 232
Cash Flow Hedge (OCI) [Member] |  |
Cash flow hedges: Unrealized holding (losses) gains, Before Tax | (1,187) | (1,172)
Cash flow hedges: Unrealized holding (losses) gains, Tax Effect | 318 | 314
Cash flow hedges: Unrealized holding (losses) gains, Net of Tax | (869) | (858)
Cash flow hedges: Net unrealized (losses) gains, Before Tax | (1,187) | (1,172)
Cash flow hedges: Net unrealized (losses) gains, Tax Effect | 318 | 314
Cash flow hedges: Net unrealized (losses) gains, Net of Tax | (869) | (858)
Pension Plan [Member] |  |
Unrealized net actuarial loss, Before Tax | (4,456) | (4,355)
Unrealized net actuarial loss, Tax Effect | 1,194 | 1,166
Unrealized net actuarial loss, Net of Tax | (3,262) | (3,189)
Net plan liability adjustment, Before Tax | (3,023) | (3,278)
Net plan liability adjustment, Tax Effect | 810 | 878
Net plan liability adjustment, Net of Tax | (2,213) | (2,400)
Pension Plan [Member] | Amortization of Unrecognized Loss [Member] |  |
Less: amortization of unrecognized loss, Before Tax | (1,433) | (1,077)
Less: amortization of unrecognized loss, Tax Effect | 384 | 288
Less: amortization of unrecognized loss, Net of Tax | (1,049) | (789)
SERP [Member] |  |
Unrealized net actuarial loss, Before Tax | (854) | (997)
Unrealized net actuarial loss, Tax Effect | 229 | 267
Unrealized net actuarial loss, Net of Tax | (625) | (730)
Net plan liability adjustment, Before Tax | (666) | (884)
Net plan liability adjustment, Tax Effect | 179 | 237
Net plan liability adjustment, Net of Tax | (487) | (647)
SERP [Member] | Amortization of Unrecognized Loss [Member] |  |
Less: amortization of unrecognized loss, Before Tax | (188) | (116)
Less: amortization of unrecognized loss, Tax Effect | 50 | 31
Less: amortization of unrecognized loss, Net of Tax | $ (138) | (85)
SERP [Member] | Amortization of Prior Service Costs [Member] |  |
Less: amortization of prior service costs, Before Tax |  | 3
Less: amortization of prior service costs, Tax Effect |  | (1)
Less: amortization of prior service costs, Net of Tax |  | $ 2

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