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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
 12 Months Ended
Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
 
The following table presents the components of other comprehensive income (loss) for the years ended December 31, 2015, 2014 and 2013, by component:
 
Before Tax
 
Tax Effect
 
Net of Tax
 
(Dollars in thousands)
Year ended December 31, 2015
 

 
 

 
 

Net unrealized losses on investment securities:
 

 
 

 
 

Net unrealized losses arising during the period
$
(9,184
)
 
$
(3,655
)
 
$
(5,529
)
Less: Reclassification adjustment for losses realized in net income
1,866

 
742

 
1,124

Net unrealized losses on investment securities
(7,318
)
 
(2,913
)
 
(4,405
)
 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Net actuarial gains arising during the period
687

 
274

 
413

Amortization of net actuarial losses
1,688

 
672

 
1,016

Amortization of net transition obligation
16

 
7

 
9

Amortization of prior service cost
18

 
7

 
11

Defined benefit plans, net
2,409

 
960

 
1,449

 
 
 
 
 
 
Other comprehensive income
$
(4,909
)
 
$
(1,953
)
 
$
(2,956
)
 
 
 
 
 
 
Year ended December 31, 2014
 

 
 

 
 

Net unrealized gains on investment securities:
 

 
 

 
 

Net unrealized gains arising during the period
$
36,780

 
$
14,714

 
$
22,066

Less: Reclassification adjustment for losses realized in net income
1,071

 
426

 
645

Net unrealized gains on investment securities
37,851

 
15,140

 
22,711

 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Net actuarial losses arising during the period
(7,409
)
 
(3,052
)
 
(4,357
)
Amortization of net actuarial losses
1,070

 
441

 
629

Amortization of net transition obligation
17

 
7

 
10

Amortization of prior service cost
18

 
7

 
11

Defined benefit plans, net
(6,304
)
 
(2,597
)
 
(3,707
)
 
 
 
 
 
 
Other comprehensive income
$
31,547

 
$
12,543

 
$
19,004

 
 
 
 
 
 
Year ended December 31, 2013
 

 
 

 
 

Net unrealized losses on investment securities:
 

 
 

 
 

Net unrealized losses arising during the period
$
(43,687
)
 
$
(15,577
)
 
$
(28,110
)
Less: Reclassification adjustment for gains realized in net income
(6,266
)
 
(2,511
)
 
(3,755
)
 
Before Tax
 
Tax Effect
 
Net of Tax
 
(Dollars in thousands)
Net unrealized losses on investment securities
(49,953
)
 
(18,088
)
 
(31,865
)
 
 
 
 
 
 
Net unrealized losses on derivatives:
 

 
 

 
 

Reclassification adjustment for losses realized in net income
394

 
(10,599
)
 
10,993

Net unrealized losses on derivatives
394

 
(10,599
)
 
10,993

 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Net actuarial gains arising during the period
6,952

 
2,591

 
4,361

Amortization of net actuarial losses
2,461

 
986

 
1,475

Amortization of net transition obligation
17

 
7

 
10

Amortization of prior service cost
18

 
7

 
11

Defined benefit plans, net
9,448

 
3,591

 
5,857

 
 
 
 
 
 
Other comprehensive loss
$
(40,111
)
 
$
(25,096
)
 
$
(15,015
)

 
The following table presents the changes in each component of AOCI, net of tax, for the years ended December 31, 2015, 2014 and 2013:
 
 
Investment
Securities
 
Derivatives
 
Defined
Benefit
Plans
 
Accumulated Other Comprehensive Income (Loss)
 
(Dollars in thousands)
Year ended December 31, 2015
 

 
 

 
 

 
 

Balance at beginning of period
$
13,586

 
$
—

 
$
(10,427
)
 
$
3,159

 
 
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
(5,529
)
 
—

 
413

 
(5,116
)
Amounts reclassified from AOCI
1,124

 
—

 
1,036

 
2,160

Total other comprehensive income (loss)
(4,405
)
 
—

 
1,449

 
(2,956
)
Balance at end of period
$
9,181

 
$
—

 
$
(8,978
)
 
$
203

 
 
 
 
 
 
 
 
Year ended December 31, 2014
 

 
 

 
 

 
 

Balance at beginning of period
$
(9,125
)
 
$
—

 
$
(6,720
)
 
$
(15,845
)
 
 
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
22,066

 
—

 
(4,357
)
 
17,709

Amounts reclassified from AOCI
645

 
—

 
650

 
1,295

Total other comprehensive income (loss)
22,711

 
—

 
(3,707
)
 
19,004

Balance at end of period
$
13,586

 
$
—

 
$
(10,427
)
 
$
3,159

 
 
 
 
 
 
 
 
Year ended December 31, 2013
 

 
 

 
 

 
 

Balance at beginning of period
$
22,740

 
$
(10,993
)
 
$
(12,577
)
 
$
(830
)
 
 
 
 
 
 
 
 
Other comprehensive loss before reclassifications
(28,110
)
 
—

 
4,361

 
(23,749
)
Amounts reclassified from AOCI
(3,755
)
 
10,993

 
1,496

 
8,734

Total other comprehensive loss
(31,865
)
 
10,993

 
5,857

 
(15,015
)
Balance at end of period
$
(9,125
)
 
$
—

 
$
(6,720
)
 
$
(15,845
)


The following table presents the amounts reclassified out of each component of AOCI for the years ended December 31, 2015, 2014 and 2013:
 
 
Amount Reclassified from AOCI
 
Affected Line Item in the
Details about AOCI Components (Dollars in Thousands)
Year ended December 31,
 
 Statement Where Net
2015
 
2014
 
2013
 
Income is Presented
 
 
 
 
 
 
 
 
Sale of investment securities available for sale
$
(1,866
)
 
$
(1,071
)
 
$
6,266

 
Investment securities gains (losses)
 
742

 
426

 
(2,511
)
 
Tax (expense) benefit
 
$
(1,124
)
 
$
(645
)
 
$
3,755

 
Net of tax
 
 
 
 
 
 
 
 
Unrealized gains (losses) on derivatives
$
—

 
$
—

 
$
(394
)
 
Interest income
 
—

 
—

 
(10,599
)
 
Tax expense
 
$
—

 
$
—

 
$
(10,993
)
 
Net of tax
 
 
 
 
 
 
 
 
Amortization of defined benefit plan items
 

 
 

 
 

 
 
Net actuarial losses
$
(1,688
)
 
$
(1,070
)
 
$
(2,461
)
 
(1)
Net transition obligation
(16
)
 
(17
)
 
(17
)
 
(1)
Prior service cost
(18
)
 
(18
)
 
(18
)
 
(1)
 
(1,722
)
 
(1,105
)
 
(2,496
)
 
Total before tax
 
686

 
455

 
1,000

 
Tax benefit
 
$
(1,036
)
 
$
(650
)
 
$
(1,496
)
 
Net of tax
 
 
 
 
 
 
 
 
Total reclassifications for the period
$
(2,160
)
 
$
(1,295
)
 
$
(8,734
)
 
Net of tax

 
 

(1)
These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see Note 15 for additional details).