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Accumulated Other Comprehensive (Loss) Income (Tables)
 6 Months Ended
Jun. 30, 2015
Equity [Abstract]  
Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes
The following table shows the components of accumulated other comprehensive (loss) income, net of taxes, for the periods presented:
(Dollars in thousands)
Net Unrealized
Gains (Losses) on
Available-for-Sale
Investment
Securities
 
Net Change
Related to
Derivatives Used for Cash Flow Hedges
 
Net Change
Related to
Defined Benefit
Pension Plans
 
Accumulated
Other
Comprehensive
(Loss) Income
Balance, December 31, 2014
$
1,711

 
$
(157
)
 
$
(16,016
)
 
$
(14,462
)
Net Change
(1,085
)
 
26

 
351

 
(708
)
Balance, June 30, 2015
$
626

 
$
(131
)
 
$
(15,665
)
 
$
(15,170
)
Balance, December 31, 2013
$
(1,472
)
 
$
—

 
$
(8,483
)
 
$
(9,955
)
Net Change
3,185

 
—

 
122

 
3,307

Balance, June 30, 2014
$
1,713

 
$
—

 
$
(8,361
)
 
$
(6,648
)
Amounts Reclassified Out of Each Component of Accumulated Comprehensive (Loss) Income
The following table illustrates the amounts reclassified out of each component of accumulated comprehensive (loss) income for the three and six months ended June 30, 2015 and 2014:
Details about Accumulated Other
Comprehensive (Loss) Income Components
 
Amount Reclassified from Accumulated
Other Comprehensive (Loss) Income
 
Affected Line Item in the
Statement of Income
 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
 
(Dollars in thousands)
 
2015
 
2014
 
2015
 
2014
 
 
Net unrealized holding gains (losses) on available-for-sale investment securities:
 
 
 
 
 
 
 
 
 
 
 
 
$
181

 
$
415

 
$
272

 
$
557

 
Net gain on sales of investment securities
 
 
181

 
415

 
272

 
557

 
Total before tax
 
 
(63
)
 
(145
)
 
(95
)
 
(195
)
 
Tax expense
 
 
$
118

 
$
270

 
$
177

 
$
362

 
Net of tax
Defined benefit pension plans:
 
 
 
 
 
 
 
 
 
 
Amortization of net loss included in net periodic pension costs*
 
$
(340
)
 
$
(167
)
 
$
(681
)
 
$
(331
)
 
 
Accretion of prior service cost included in net periodic pension costs*
 
70

 
69

 
140

 
144

 
 
 
 
(270
)
 
(98
)
 
(541
)
 
(187
)
 
Total before tax
 
 
94

 
34

 
190

 
65

 
Tax benefit
 
 
$
(176
)
 
$
(64
)
 
$
(351
)
 
$
(122
)
 
Net of tax
*
These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost. (See Note 7—Retirement Plans and Other Postretirement Benefits for additional details.)