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Accumulated Other Comprehensive Loss
 12 Months Ended
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss

The following table details the components of accumulated other comprehensive (loss) income for the years ended December 31, 2018, 2017 and 2016:
 
(dollars in thousands)
Net Change in Unrealized Gains on Available-for-Sale Investment Securities
 
Net Change in Unfunded Pension Liability
 
Accumulated Other Comprehensive Loss
Balance, December 31, 2015
$
774

 
$
(1,186
)
 
$
(412
)
Other comprehensive (loss) income
(2,005
)
 
8

 
(1,997
)
Balance, December 31, 2016
(1,231
)
 
(1,178
)
 
(2,409
)
Other comprehensive (loss) income
(1,123
)
 
(100
)
 
(1,223
)
Reclassification due to the adoption of ASU No. 2018-02
(507
)
 
(275
)
 
(782
)
Balance, December 31, 2017
(2,861
)
 
(1,553
)
 
(4,414
)
Other comprehensive (loss) income
(3,368
)
 
269

 
(3,099
)
Balance, December 31, 2018
$
(6,229
)
 
$
(1,284
)
 
$
(7,513
)










The following tables detail the amounts reclassified from each component of accumulated other comprehensive loss for the years ended December 31, 2018, 2017 and 2016:
 
 
 
Amount Reclassified from Accumulated Other Comprehensive Loss
 
 
Description of Accumulated Other
Comprehensive Loss Component
 
For the Year Ended
December 31,
 
Affected Income Statement Category
 
 
2018
 
2017
 
2016
 
 
Net unrealized gain on investment securities available for sale:
 
 
 
 
 
 
 
 
Realization of gain (loss) on sale of investment securities available for sale
 
$
7

 
$
101

 
$
(77
)
 
Net gain (loss) on sale of investment securities available for sale
Realization of gain on transfer of investment securities available for sale to trading
 
417

 
—

 
—

 
Other operating income
Total
 
$
424

 
$
101

 
$
(77
)
 
 
Income tax effect
 
89

 
35

 
(27
)
 
Income tax expense
Net of income tax
 
$
335

 
$
66

 
$
(50
)
 
Net income
 
 
 
 
 
 
 
 
 
Unfunded pension liability:
 
 
 
 
 
 
 
 
Amortization of net loss included in net periodic pension costs(1)
 
$
100

 
$
95

 
$
98

 
Other operating expenses
Income tax effect
 
21

 
33

 
34

 
Income tax expense
Net of income tax
 
$
79

 
$
62

 
$
64

 
Net income

(1) Accumulated other comprehensive loss components are included in the computation of net periodic pension cost. See Note 15, “Pension and Postretirement Benefit Plans,” in the accompanying Notes to the Consolidated Financial Statements in this Annual Report on Form 10-K.