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Accumulated Other Comprehensive Loss (Components of Comprehensive Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax | $ 1,577 | $ (230) | $ 2,482 | $ (1,308)
Cash flow hedges: Unrealized holding gains, Before Tax | (666) | 148 | (1,098) | 755
Cash flow hedges: Unrealized holding gains, Tax Effect | 180 | (40) | 297 | (204)
Cash flow hedges: Unrealized holding gains, Net of Tax | (486) | 108 | (801) | 551
Unrealized net actuarial loss, Net of Tax | 707 | (1,530) | 2,836 | (794)
Other comprehensive income, Before tax amount | 2,316 | (876) | 6,041 | 248
Other comprehensive income, Tax (expense) benefit | (628) | 236 | (1,638) | (68)
Other comprehensive income, Net | 1,688 | (640) | 4,403 | 180
Investment securities- with OTTI AFS [Member] |  |  |  |
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Before tax amount | (216) | 1,493 | (276) | 2,432
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Tax effect | 59 | (404) | 75 | (658)
Available for sale (AFS) securities with OTTI: Unrealized holding gains, Net of tax | (157) | 1,089 | (201) | 1,774
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income, Before tax amount | 50 | 52 | 99 | 107
Available for sale (AFS) securities with OTTI: Less: accretable yield recognized in income, Tax effect | (13) | (14) | (26) | (29)
Other than temporary impairment losses, investments, reclassification adjustment of noncredit portion included in net income, Available for sale securities, Net of tax | 37 | 38 | 73 | 78
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI, Before tax amount | (266) | 1,296 | (375) | 2,180
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI, Tax effect | 72 | (351) | 101 | (590)
Available for sale (AFS) securities with OTTI: Net unrealized gains on investments with OTTI, Net of tax | (194) | 945 | (274) | 1,590
Securities: Less: gain (losses) recognized in income, Before tax |  | 145 |  | 145
Securities: Less: gain (losses) recognized in income, Tax effect |  | (39) |  | (39)
Securities: gains (losses) recognized in income, Net of tax |  | 106 |  | 106
Investment Securities -All Other AFS [Member] |  |  |  |
Securities: Unrealized holding losses, Before tax | 2,169 | (325) | 3,405 | (1,812)
Securities: Unrealized holding losses, Tax effect | (588) | 88 | (923) | 490
Securities: Unrealized holding losses, Net of tax | 1,581 | (237) | 2,482 | (1,322)
Securities: Less: gain (losses) recognized in income, Before tax | 6 | (10) |  | (19)
Securities: Less: gain (losses) recognized in income, Tax effect | (2) | 3 |  | 5
Securities: gains (losses) recognized in income, Net of tax | 4 | (7) |  | (14)
Available for sale securities: Net unrealized losses on all other AFS securities, Before Tax | 2,163 | (315) | 3,405 | (1,793)
Available for sale securities: Net unrealized losses on all other AFS securities, Tax effect | (586) | 85 | (923) | 485
Available for sale securities - all other: Net unrealized losses on all other AFS securities, Net of tax | 1,577 | (230) | 2,482 | (1,308)
Investment Securities HTM [Member] |  |  |  |
Securities: Less: gain (losses) recognized in income, Before tax | (86) | (52) | (161) | (114)
Securities: Less: gain (losses) recognized in income, Tax effect | 23 | 14 | 43 | 31
Securities: gains (losses) recognized in income, Net of tax | (63) | (38) | (118) | (83)
Held to maturity securities: Net unrealized losses on all HTM securities, Before tax | 86 | 52 | 161 | 114
Held to maturity securities: Net unrealized losses on all HTM securities, Tax | (23) | (14) | (43) | (31)
Held to maturity securities: Net unrealized losses on all HTM securities, After tax | 63 | 38 | 118 | 83
Pension Plan [Member] |  |  |  |
Unrealized net actuarial loss, Before Tax | 701 | (2,399) | 3,353 | (1,692)
Unrealized net actuarial loss, Tax Effect | (190) | 648 | (909) | 457
Unrealized net actuarial loss, Net of Tax | 511 | (1,751) | 2,444 | (1,235)
Net plan liability adjustment, Before Tax | 970 | (2,097) | 3,891 | (1,088)
Net plan liability adjustment, Tax Effect | (263) | 567 | (1,055) | 294
Net plan liability adjustment, Net of Tax | 707 | (1,530) | 2,836 | (794)
SERP [Member] |  |  |  |
Net plan liability adjustment, Before Tax | 29 | 40 | 57 | 80
Net plan liability adjustment, Tax Effect | (8) | (11) | (15) | (22)
Net plan liability adjustment, Net of Tax | 21 | 29 | 42 | 58
Amortization of unrecognized loss [Member] | Pension Plan [Member] |  |  |  |
Less: amortization of unrecognized net gain (loss), Before Tax | (269) | (300) | (538) | (600)
Less: amortization of unrecognized net gain (loss), Tax Effect | 73 | 81 | 146 | 162
Less: amortization of unrecognized net gain (loss), Net of Tax | (196) | (219) | (392) | (438)
Amortization of unrecognized loss [Member] | SERP [Member] |  |  |  |
Less: amortization of unrecognized net gain (loss), Before Tax | (29) | (40) | (58) | (81)
Less: amortization of unrecognized net gain (loss), Tax Effect | 8 | 11 | 15 | 22
Less: amortization of unrecognized net gain (loss), Net of Tax | $ (21) | (29) | (43) | (59)
Amortization of prior service costs [Member] | Pension Plan [Member] |  |  |  |
Less: amortization of prior service costs, Before Tax |  | (2) |  | (4)
Less: amortization of prior service costs, Tax Effect |  |  |  | 1
Less: amortization of prior service costs, Net of Tax |  | $ (2) |  | (3)
Amortization of prior service costs [Member] | SERP [Member] |  |  |  |
Less: amortization of prior service costs, Before Tax |  |  | 1 | 1
Less: amortization of prior service costs, Net of Tax |  |  | $ 1 | $ 1

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