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Accumulated Other Comprehensive Income (Loss) (Tables)
 6 Months Ended
Jun. 30, 2018
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
(Dollar amounts in thousands)
Unrealized Gains
and Losses on
Available-for-Sale
Securities
 
Defined
Benefit
Pension
Items
 
Totals
Accumulated Other Comprehensive Income (Loss) at April 1, 2017
$
(421
)
 
$
(3,812
)
 
$
(4,233
)
 
 
 
 
 
 
Other comprehensive income before reclassification
10

 
—

 
10

Amounts reclassified from accumulated other comprehensive income (loss)
104

 
—

 
104

Net current period other comprehensive income
114

 
—

 
114

 
 
 
 
 
 
Accumulated Other Comprehensive Income (Loss) at June 30, 2017
$
(307
)
 
$
(3,812
)
 
$
(4,119
)
 
 
 
 
 
 
(Dollar amounts in thousands)
Unrealized Gains
and Losses on
Available-for-Sale
Securities
 
Defined
Benefit
Pension
Items
 
Totals
Accumulated Other Comprehensive Income (Loss) at January 1, 2017
$
(679
)
 
$
(3,812
)
 
$
(4,491
)
 
 
 
 
 
 
Other comprehensive income before reclassification
268

 
—

 
268

Amounts reclassified from accumulated other comprehensive income (loss)
104

 
—

 
104

Net current period other comprehensive income
372

 
—

 
372

 
 
 
 
 
 
Accumulated Other Comprehensive Income (Loss) at June 30, 2017
$
(307
)
 
$
(3,812
)
 
$
(4,119
)
 
 
 
 
 
 
The following tables summarize the changes within each classification of accumulated other comprehensive income (loss), net of tax, for the six months ended June 30, 2018 and 2017 and summarized the significant amounts reclassified out of each component of accumulated other comprehensive income:

(Dollar amounts in thousands)
Unrealized Gains
and Losses on
Available-for-Sale
Securities
 
Defined
Benefit
Pension
Items
 
Totals
Accumulated Other Comprehensive Income (Loss) at December 31, 2017
$
(679
)
 
$
(4,839
)
 
$
(5,518
)
Cumulative effect of change in accounting principle for marketable equity securities, net of tax
(187
)
 
—

 
(187
)
Accumulated Other Comprehensive Income (Loss) at January 1, 2018, as adjusted
$
(866
)
 
$
(4,839
)
 
$
(5,705
)
 
 
 
 
 
 
Other comprehensive income before reclassification
(1,275
)
 
—

 
(1,275
)
Amounts reclassified from accumulated other comprehensive income (loss)
24

 
—

 
24

Net current period other comprehensive income
(1,251
)
 
—

 
(1,251
)
 
 
 
 
 
 
Accumulated Other Comprehensive Income (Loss) at June 30, 2018
(2,117
)
 
(4,839
)
 
(6,956
)
 
 
 
 
 
 
The following tables summarize the changes within each classification of accumulated other comprehensive income (loss), net of tax, for the three months ended June 30, 2018 and 2017 and summarizes the significant amounts reclassified out of each component of accumulated other comprehensive income:
 
(Dollar amounts in thousands)
Unrealized Gains
and Losses on
Available-for-Sale
Securities
 
Defined
Benefit
Pension
Items
 
Totals
Accumulated Other Comprehensive Income (Loss) at April 1, 2018
$
(1,881
)
 
$
(4,839
)
 
$
(6,720
)
 
 
 
 
 
 
Other comprehensive income before reclassification
(237
)
 
—

 
(237
)
Amounts reclassified from accumulated other comprehensive income (loss)
1

 
—

 
1

Net current period other comprehensive income
(236
)
 
—

 
(236
)
 
 
 
 
 
 
Accumulated Other Comprehensive Income (Loss) at June 30, 2018
$
(2,117
)
 
$
(4,839
)
 
$
(6,956
)
 
 
 
 
 
 
Reclassification out of Accumulated Other Comprehensive Income
(Dollar amount in thousands)
 
 
 
 
Details about Accumulated Other
Comprehensive Income Components
 
Amount Reclassified
from Accumulated
Other Comprehensive
Income
For the six months
ended June 30, 2018
 
Affected Line Item in the
Statement Where Net
Income is Presented
Unrealized gains and losses on available-for-sale securities
 
(31
)
 
Net gain (loss) on sale of available-for-sale securities
Unrealized gains and losses on available-for-sale securities
 
—

 
Other than temporary impairment losses
 
 
7

 
Provision for income taxes
Total reclassifications for the period
 
(24
)
 
Net of tax
 
 
 
 
 
(Dollar amounts in thousands)
 
 
 
 
Details about Accumulated Other
Comprehensive Loss Components
 
Amount Reclassified
from Accumulated
Other Comprehensive
Income
For the three months
ended June 30, 2018
 
Affected Line Item in the
Statement Where Net
Income is Presented
Unrealized gains and losses on available-for-sale securities
 
$
(2
)
 
Net gain (loss) on sale of securities
 
 
1

 
Provision for income taxes
Total reclassifications for the period
 
$
(1
)
 
Net of tax
 
 
 
 
 
(Dollar amount in thousands)
 
 
 
 
Details about Accumulated Other
Comprehensive Income Components
 
Amount Reclassified
from Accumulated
Other Comprehensive
Income
For the six months
ended June 30, 2017
 
Affected Line Item in the
Statement Where Net
Income is Presented
Unrealized gains and losses on available-for-sale securities
 
350

 
Net gain on sale of available-for-sale securities
Unrealized gains and losses on available-for-sale securities
 
(508
)
 
Other than temporary impairment losses
 
 
54

 
Provision for income taxes
Total reclassifications for the period
 
(104
)
 
Net of tax
 
 
 
 
 
(Dollar amounts in thousands)
 
 
 
 
Details about Accumulated Other
Comprehensive Loss Components
 
Amount Reclassified
from Accumulated
Other Comprehensive
Income
For the three months
ended June 30, 2017
 
Affected Line Item in the
Statement Where Net
Income is Presented
Unrealized gains and losses on available-for-sale securities
 
$
350

 
Net gain on sale of available-for-sale securities
Unrealized gains and losses on available-for-sale securities
 
(508
)
 
Other than temporary impairment losses
 
 
54

 
Provision for income taxes
Total reclassifications for the period
 
$
(104
)
 
Net of tax
 
 
 
 
 
(Dollar amounts in thousands)
 
 
 
 
Details about Accumulated Other
Comprehensive Loss Components
 
Amount Reclassified
from Accumulated
Other Comprehensive
Income
For the three months
ended June 30, 2018
 
Affected Line Item in the
Statement Where Net
Income is Presented
Unrealized gains and losses on available-for-sale securities
 
$
(2
)
 
Net gain (loss) on sale of securities
 
 
1

 
Provision for income taxes
Total reclassifications for the period
 
$
(1
)
 
Net of tax