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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Income
The following tables summarize the changes, net of tax, within each classification of accumulated other comprehensive income/(loss) for the three and six months ended June 30, 2018 and 2017. 
 
 
Unrealized
 
 
 
 
 
 
gains and
 
2018
 
 
(Losses) on
available-
for-sale
 
Retirement
 
 
(Dollar amounts in thousands)
 
Securities
 
plans
 
Total
Beginning balance, April 1,
 
$
(4,943
)
 
$
(19,545
)
 
$
(24,488
)
Change in other comprehensive income (loss) before reclassification
 
(4,680
)
 
—

 
(4,680
)
Amounts reclassified from accumulated other comprehensive income
 
(2
)
 
281

 
279

ASU 2018-02 adjustment
 
—

 
—

 
—

Net current period other comprehensive income (loss)
 
(4,682
)
 
281

 
(4,401
)
Ending balance, June 30,
 
$
(9,625
)
 
$
(19,264
)
 
$
(28,889
)
 
 
 
 
 
 
 
 
 
Unrealized
 
 
 
 
 
 
gains and
 
2018
 
 
(Losses) on
available-
for-sale
 
Retirement
 
 
(Dollar amounts in thousands)
 
Securities
 
plans
 
Total
Beginning balance, January 1,
 
$
2,258

 
$
(16,962
)
 
$
(14,704
)
Change in other comprehensive income (loss) before reclassification
 
(12,379
)
 
—

 
(12,379
)
Amounts reclassified from accumulated other comprehensive income
 
(2
)
 
562

 
560

ASU 2018-02 adjustment
 
498

 
(2,864
)
 
(2,366
)
Net current period other comprehensive loss
 
(11,883
)
 
(2,302
)
 
(14,185
)
Ending balance, June 30,
 
$
(9,625
)
 
$
(19,264
)
 
$
(28,889
)
 
 
Unrealized
 
 
 
 
 
 
gains and
 
2017
 
 
(Losses) on
available-
for-sale
 
Retirement
 
 
(Dollar amounts in thousands)
 
Securities
 
plans
 
Total
Beginning balance, April 1,
 
$
2,111

 
$
(12,904
)
 
$
(10,793
)
Change in other comprehensive income (loss) before reclassification
 
5,055

 
—

 
5,055

Amounts reclassified from accumulated other comprehensive income
 
(10
)
 
184

 
174

Net current period other comprehensive income
 
5,045

 
184

 
5,229

Ending balance, June 30,
 
$
7,156

 
$
(12,720
)
 
$
(5,564
)
 
 
 
 
 
 
 
 
 
Unrealized
 
 
 
 
 
 
gains and
 
2017
 
 
(Losses) on
available-
for-sale
 
Retirement
 
 
(Dollar amounts in thousands)
 
Securities
 
plans
 
Total
Beginning balance, January 1,
 
$
(1,077
)
 
$
(13,087
)
 
$
(14,164
)
Change in other comprehensive income (loss) before reclassification
 
8,244

 
—

 
8,244

Amounts reclassified from accumulated other comprehensive income
 
(11
)
 
367

 
356

Net current period other comprehensive income
 
8,233

 
367

 
8,600

Ending balance, June 30,
 
$
7,156

 
$
(12,720
)
 
$
(5,564
)
Schedule Of Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment
 
 
 
 
 
 
 
 
 
Balance
at
 
Current
Period
 
Balance
at
(Dollar amounts in thousands)
 
1/1/2018
 
Change
 
6/30/2018
Unrealized gains (losses) on securities available-for-sale
 
 
 
 
 
 
without other than temporary impairment
 
$
(1,371
)
 
$
(10,221
)
 
$
(11,592
)
Unrealized gains (losses) on securities available-for-sale
 
 

 
 

 
 

with other than temporary impairment
 
3,629

 
(1,662
)
 
1,967

Total unrealized loss on securities available-for-sale
 
$
2,258

 
$
(11,883
)
 
$
(9,625
)
Unrealized loss on retirement plans
 
(16,962
)
 
(2,302
)
 
(19,264
)
TOTAL
 
$
(14,704
)
 
$
(14,185
)
 
$
(28,889
)
 
 
Balance
at
 
Current
Period
 
Balance
at
(Dollar amounts in thousands)
 
4/1/2017
 
Change
 
6/30/2017
Unrealized gains (losses) on securities available-for-sale
 
 

 
 

 
 

without other than temporary impairment
 
$
326

 
$
4,803

 
$
5,129

Unrealized gains (losses) on securities available-for-sale
 
 

 
 

 
 

with other than temporary impairment
 
1,785

 
242

 
2,027

Total unrealized loss on securities available-for-sale
 
$
2,111

 
$
5,045

 
$
7,156

Unrealized loss on retirement plans
 
(12,904
)
 
184

 
(12,720
)
TOTAL
 
$
(10,793
)
 
$
5,229

 
$
(5,564
)
 
 
 
 
 
 
 
 
 
Balance
at
 
Current
Period
 
Balance
at
(Dollar amounts in thousands)
 
1/1/2017
 
Change
 
6/30/2017
Unrealized gains (losses) on securities available-for-sale
 
 

 
 

 
 

without other than temporary impairment
 
$
(3,018
)
 
$
8,147

 
$
5,129

Unrealized gains (losses) on securities available-for-sale
 
 

 
 

 
 

with other than temporary impairment
 
1,941

 
86

 
2,027

Total unrealized loss on securities available-for-sale
 
$
(1,077
)
 
$
8,233

 
$
7,156

Unrealized loss on retirement plans
 
(13,087
)
 
367

 
(12,720
)
TOTAL
 
$
(14,164
)
 
$
8,600

 
$
(5,564
)
Accumulated Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
 
 
Three Months Ended June 30, 2018
 
 
Details about accumulated
 
Amount reclassified from
 
Affected line item in
other comprehensive
 
accumulated other
 
the statement where
income components
 
comprehensive income
 
net income is presented
 
 
(in thousands)
 
 
Unrealized gains and losses
 
$
2

 
Net securities gains (losses)
on available-for-sale
 
—

 
Income tax expense
securities
 
$
2

 
Net of tax
 
 
 
 
 
Amortization of
 
$
(362
)
 
(a) Salary and benefits
retirement plan items
 
81

 
Income tax expense
 
 
$
(281
)
 
Net of tax
Total reclassifications for the period
 
$
(279
)
 
Net of tax
(a) Included in the computation of net periodic benefit cost. (see Footnote 6 for additional details).

 
 
 
 
 
 
 
Six Months Ended June 30, 2018
 
 
Details about accumulated
 
Amount reclassified from
 
Affected line item in
other comprehensive
 
accumulated other
 
the statement where
income components
 
comprehensive income
 
net income is presented
 
 
(in thousands)
 
 
Unrealized gains and losses
 
$
2

 
Net securities gains (losses)
on available-for-sale
 
—

 
Income tax expense
securities
 
$
2

 
Net of tax
 
 
 
 
 
Amortization of
 
$
(723
)
 
(a) Salary and benefits
retirement plan items
 
161

 
Income tax expense
 
 
$
(562
)
 
Net of tax
Total reclassifications for the period
 
$
(560
)
 
Net of tax
(a) Included in the computation of net periodic benefit cost. (see Footnote 6 for additional details).

 
 
Three Months Ended June 30, 2017
 
 
Details about accumulated
 
Amount reclassified from
 
Affected line item in
other comprehensive
 
accumulated other
 
the statement where
income components
 
comprehensive income
 
net income is presented
 
 
(in thousands)
 
 
Unrealized gains and losses
 
$
15

 
Net securities gains (losses)
on available-for-sale
 
(5
)
 
Income tax expense
securities
 
$
10

 
Net of tax
 
 
 
 
 
Amortization of
 
$
(301
)
 
(a) Salary and benefits
retirement plan items
 
117

 
Income tax expense
 
 
$
(184
)
 
Net of tax
Total reclassifications for the period
 
$
(174
)
 
Net of tax

(a) Included in the computation of net periodic benefit cost. (see Footnote 6 for additional details).