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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)
 12 Months Ended
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of components of other comprehensive income (loss)
 
Before Tax
 
Tax Effect
 
Net of Tax
 
(Dollars in thousands)
Year ended December 31, 2018
 

 
 

 
 

Net unrealized losses on investment securities:
 

 
 

 
 

Net unrealized losses arising during the period
$
(19,063
)
 
$
(5,145
)
 
$
(13,918
)
Less: Reclassification adjustment for losses realized in net income
(279
)
 
(75
)
 
(204
)
Net unrealized losses on investment securities
(19,342
)
 
(5,220
)
 
(14,122
)
 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Net actuarial gains arising during the period
264

 
71

 
193

Amortization of net actuarial losses
1,153

 
329

 
824

Amortization of net transition obligation
18

 
5

 
13

Amortization of prior service cost
18

 
5

 
13

Defined benefit plans, net
1,453

 
410

 
1,043

 
 
 
 
 
 
Other comprehensive loss
$
(17,889
)
 
$
(4,810
)
 
$
(13,079
)


 
Before Tax
 
Tax Effect
 
Net of Tax
 
(Dollars in thousands)
Year ended December 31, 2017
 

 
 

 
 

Net unrealized gains on investment securities:
 

 
 

 
 

Net unrealized losses arising during the period
$
(838
)
 
$
(333
)
 
$
(505
)
Less: Reclassification adjustment for gains realized in net income
1,410

 
561

 
849

Net unrealized gains on investment securities
572

 
228

 
344

 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Net actuarial losses arising during the period
(1,318
)
 
(518
)
 
(800
)
Amortization of net actuarial losses
1,293

 
460

 
833

Amortization of net transition obligation
18

 
7

 
11

Amortization of prior service cost
18

 
7

 
11

Settlement
138

 
55

 
83

Defined benefit plans, net
149

 
11

 
138

 
 
 
 
 
 
Other comprehensive income
$
721

 
$
239

 
$
482


The following table presents the components of other comprehensive income (loss) for the years ended December 31, 2019, 2018 and 2017, by component:

 
Before Tax
 
Tax Effect
 
Net of Tax
 
(Dollars in thousands)
Year ended December 31, 2019
 

 
 

 
 

Net unrealized gains on investment securities:
 

 
 

 
 

Net unrealized gains arising during the period
$
37,696

 
$
10,102

 
$
27,594

Less: Reclassification adjustment for losses realized in net income
(36
)
 
(10
)
 
(26
)
Net unrealized gains on investment securities
37,660

 
10,092

 
27,568

 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Net actuarial losses arising during the period
(1,106
)
 
(296
)
 
(810
)
Amortization of net actuarial losses
1,117

 
299

 
818

Amortization of net transition obligation
18

 
5

 
13

Amortization of prior service cost
18

 
5

 
13

Defined benefit plans, net
47

 
13

 
34

 
 
 
 
 
 
Other comprehensive income
$
37,707

 
$
10,105

 
$
27,602
Schedule of changes in each component of AOCI, net of tax
 
Investment
Securities
 
Defined
Benefit
Plans
 
Accumulated
Other
Comprehensive
Income (Loss)
 
(Dollars in thousands)
Year ended December 31, 2017
 

 
 

 
 

Balance at beginning of period
$
4,729

 
$
(6,250
)
 
$
(1,521
)
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
(505
)
 
(800
)
 
(1,305
)
Amounts reclassified from AOCI
849

 
938

 
1,787

Total other comprehensive income (loss)
344

 
138

 
482

Balance at end of period
$
5,073

 
$
(6,112
)
 
$
(1,039
)


 
Investment
Securities
 
Defined
Benefit
Plans
 
Accumulated
Other
Comprehensive
Income (Loss)
 
(Dollars in thousands)
Year ended December 31, 2018
 

 
 

 
 

Balance at beginning of period
$
5,073

 
$
(6,112
)
 
$
(1,039
)
Impact of adoption of new accounting standards
(139
)
 
—

 
(139
)
Adjusted balance at beginning of period
4,934

 
(6,112
)
 
(1,178
)
 
 
 
 
 
 
Impact of adoption of new accounting standards
(455
)
 
(1,381
)
 
(1,836
)
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
(13,918
)
 
193

 
(13,725
)
Amounts reclassified from AOCI
(204
)
 
850

 
646

Net other comprehensive income (loss)
(14,122
)
 
1,043

 
(13,079
)
Balance at end of period
$
(9,643
)
 
$
(6,450
)
 
$
(16,093
)

The following table presents the changes in each component of AOCI, net of tax, for the years ended December 31, 2019, 2018 and 2017:
 
 
Investment
Securities
 
Defined
Benefit
Plans
 
Accumulated
Other
Comprehensive
Income (Loss)
 
(Dollars in thousands)
Year ended December 31, 2019
 

 
 

 
 

Balance at beginning of period
$
(9,643
)
 
$
(6,450
)
 
$
(16,093
)
Impact of adoption of new accounting standards
(3,100
)
 
—

 
(3,100
)
Adjusted balance at beginning of period
(12,743
)
 
(6,450
)
 
(19,193
)
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
27,594

 
(810
)
 
26,784

Amounts reclassified from AOCI
(26
)
 
844

 
818

Net other comprehensive income (loss)
27,568

 
34

 
27,602

Balance at end of period
$
14,825

 
$
(6,416
)
 
$
8,409
Schedule of amounts reclassified out of each component of AOCI
The following table presents the amounts reclassified out of each component of AOCI for the years ended December 31, 2019, 2018 and 2017:
 
 
Amount Reclassified from AOCI
 
Affected Line Item in the
 
Year ended December 31,
 
 Statement Where Net
Details about AOCI Components
2019
 
2018
 
2017
 
Income is Presented
 
(Dollars in thousands)
 
 
Sale of available-for-sale investment securities:
 
 
 
 
 
 
 
Realized gains (losses) on available-for-sale investment securities
$
36

 
$
279

 
$
(1,410
)
 
Net gains (losses) on sales of investment securities
Tax effect
(10
)
 
(75
)
 
561

 
Income tax benefit (expense)
Net of tax
$
26

 
$
204

 
$
(849
)
 
 
 
 
 
 
 
 
 
 
Defined benefit plan items:
 

 
 

 
 

 
 
Amortization of net actuarial losses
$
(1,117
)
 
$
(1,153
)
 
$
(1,293
)
 
Salaries and employee benefits (1)
Amortization of net transition obligation
(18
)
 
(18
)
 
(18
)
 
Salaries and employee benefits (1)
Amortization of prior service cost
(18
)
 
(18
)
 
(18
)
 
Salaries and employee benefits (1)
Settlement
—

 
—

 
(138
)
 
Salaries and employee benefits (1)
Total before tax
(1,153
)
 
(1,189
)
 
(1,467
)
 
 
Tax effect
309

 
339

 
529

 
Income tax expense
Net of tax
$
(844
)
 
$
(850
)
 
$
(938
)
 
 
 
 
 
 
 
 
 
 
Total reclassifications, net of tax
$
(818
)
 
$
(646
)
 
$
(1,787
)