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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)
 6 Months Ended
Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of components of other comprehensive income (loss)
The following tables present the components of other comprehensive income for the three and six months ended June 30, 2018 and 2017, by component:
 
(dollars in thousands)
Before Tax
 
Tax Effect
 
Net of Tax
Three Months Ended June 30, 2018
 

 
 

 
 

Net unrealized losses on investment securities:
 

 
 

 
 

Net unrealized losses arising during the period
$
(5,057
)
 
$
(1,388
)
 
$
(3,669
)
Less: Reclassification adjustments from AOCI realized in net income
—

 
—

 
—

Net unrealized losses on investment securities
(5,057
)
 
(1,388
)
 
(3,669
)
 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Amortization of net actuarial loss
235

 
91

 
144

Amortization of net transition obligation
4

 
1

 
3

Amortization of prior service cost
4

 
1

 
3

Defined benefit plans, net
243

 
93

 
150

 
 
 
 
 
 
Other comprehensive loss
$
(4,814
)
 
$
(1,295
)
 
$
(3,519
)

(dollars in thousands)
Before Tax
 
Tax Effect
 
Net of Tax
Three Months Ended June 30, 2017
 

 
 

 
 

Net unrealized gains on investment securities:
 

 
 

 
 

Net unrealized gains arising during the period
$
3,001

 
$
1,193

 
$
1,808

Less: Reclassification adjustments from AOCI realized in net income
1,640

 
653

 
987

Net unrealized gains on investment securities
4,641

 
1,846

 
2,795

 
 
 
 
 
 
Defined benefit plans:
 

 
 

 
 

Amortization of net actuarial loss
325

 
222

 
103

Amortization of net transition obligation
5

 
2

 
3

Amortization of prior service cost
4

 
2

 
2

Settlement
138

 
56

 
82

Defined benefit plans, net
472

 
282

 
190

 
 
 
 
 
 
Other comprehensive income
$
5,113

 
$
2,128

 
$
2,985


(dollars in thousands)
Before Tax
 
Tax Effect
 
Net of Tax
Six Months Ended June 30, 2018
 

 
 

 
 

Net unrealized losses on investment securities:
 

 
 

 
 

Net unrealized losses arising during the period
$
(25,512
)
 
$
(6,872
)
 
$
(18,640
)
Less: Reclassification adjustments from AOCI realized in net income
—

 
—

 
—

Net unrealized losses on investment securities
(25,512
)
 
(6,872
)
 
(18,640
)

 
 
 
 
 
Defined benefit plans:
 
 
 

 
 

Amortization of net actuarial loss
576

 
184

 
392

Amortization of net transition obligation
9

 
2

 
7

Amortization of prior service cost
9

 
2

 
7

Defined benefit plans, net
594

 
188

 
406


 
 
 
 
 
Other comprehensive loss
$
(24,918
)
 
$
(6,684
)
 
$
(18,234
)
 
 
 
 
 
 
Schedule of changes in each component of AOCI, net of tax
The following tables present the changes in each component of AOCI, net of tax, for the three and six months ended June 30, 2018 and 2017:
 
(dollars in thousands)
Investment
Securities
 
Defined
Benefit
Plans
 
AOCI
Three Months Ended June 30, 2018
 

 
 

 
 

Balance at beginning of period
$
(10,492
)
 
$
(7,237
)
 
$
(17,729
)
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
(3,669
)
 
—

 
(3,669
)
Reclassification adjustments from AOCI
—

 
150

 
150

Total other comprehensive income (loss)
(3,669
)
 
150

 
(3,519
)
 
 
 
 
 
 
Balance at end of period
$
(14,161
)
 
$
(7,087
)
 
$
(21,248
)


(dollars in thousands)
Investment
Securities
 
Defined
Benefit
Plans
 
AOCI
Three Months Ended June 30, 2017
 

 
 

 
 

Balance at beginning of period
$
6,853

 
$
(6,614
)
 
$
239

 
 
 
 
 
 
Other comprehensive income before reclassifications
1,808

 
—

 
1,808

Reclassification adjustments from AOCI
987

 
190

 
1,177

Total other comprehensive income
2,795

 
190

 
2,985

 
 
 
 
 
 
Balance at end of period
$
9,648

 
$
(6,424
)
 
$
3,224


(dollars in thousands)
Investment
Securities
 
Defined
Benefit
Plans
 
AOCI
Six Months Ended June 30, 2018
 

 
 

 
 

Balance at beginning of period
$
5,073

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

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

 
(6,112
)
 
(1,178
)
 
 
 
 
 
 
Impact of the adoption of new accounting standards
(455
)
 
(1,381
)
 
(1,836
)
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
(18,640
)
 
—

 
(18,640
)
Reclassification adjustments from AOCI
—

 
406

 
406

Total other comprehensive income (loss)
(18,640
)
 
406

 
(18,234
)
 
 
 
 
 
 
Balance at end of period
$
(14,161
)
 
$
(7,087
)
 
$
(21,248
)
 
 
 
 
 
 

(dollars in thousands)
Investment
Securities
 
Defined
Benefit
Plans
 
AOCI
Six Months Ended June 30, 2017
 

 
 

 
 

Balance at beginning of period
$
4,729

 
$
(6,250
)
 
$
(1,521
)
 
 
 
 
 
 
Other comprehensive income (loss) before reclassifications
3,932

 
(627
)
 
3,305

Reclassification adjustments from AOCI
987

 
453

 
1,440

Total other comprehensive income (loss)
4,919

 
(174
)
 
4,745

 
 
 
 
 
 
Balance at end of period
$
9,648

 
$
(6,424
)
 
$
3,224

 
 
 
 
 
 
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 three and six months ended June 30, 2018 and 2017:
 
 
Amount Reclassified from AOCI
 
Affected Line Item in the Statement Where Net Income is Presented
Details about AOCI Components
Three months ended June 30,
 
(dollars in thousands)
2018
 
2017
 
Sale of investment securities available-for-sale
$
—

 
$
(1,640
)
 
Investment securities gains (losses)
 
—

 
653

 
Income tax benefit (expense)
 
$
—

 
$
(987
)
 
Net of tax
 
 
 
 
 
 
Amortization of defined benefit retirement and supplemental executive retirement plan items
 

 
 

 
 
Net actuarial loss
$
(235
)
 
$
(325
)
 
(1)
Net transition obligation
(4
)
 
(5
)
 
(1)
Prior service cost
(4
)
 
(4
)
 
(1)
Settlement
—

 
(138
)
 
(1)
 
(243
)
 
(472
)
 
Total before tax
 
93

 
282

 
Income tax benefit (expense)
 
$
(150
)
 
$
(190
)
 
Net of tax
 
 
 
 
 
 
Total reclassification adjustments from AOCI for the period
$
(150
)
 
$
(1,177
)
 
Net of tax

 
Amount Reclassified from AOCI
 
Affected Line Item in the Statement Where Net Income is Presented
Details about AOCI Components
Six months ended June 30,
 
(dollars in thousands)
2018
 
2017
 
Sale of investment securities available-for-sale
$
—

 
$
(1,640
)
 
Investment securities gains (losses)
 
—

 
653

 
Income tax benefit (expense)
 
$
—

 
$
(987
)
 
Net of tax
 
 
 
 
 
 
Amortization of defined benefit retirement and supplemental executive retirement plan items
 

 
 

 
 
Net actuarial loss
$
(576
)
 
$
(647
)
 
(1)
Net transition obligation
(9
)
 
(9
)
 
(1)
Prior service cost
(9
)
 
(8
)
 
(1)
Settlement
—

 
(138
)
 
(1)
 
(594
)
 
(802
)
 
Total before tax
 
188

 
349

 
Income tax benefit (expense)
 
$
(406
)
 
$
(453
)
 
Net of tax
 
 
 
 
 
 
Total reclassification adjustments from AOCI for the period
$
(406
)
 
$
(1,440
)
 
Net of tax
 
 
 
 
 
 
 

(1)
These AOCI components are included in the computation of net periodic pension cost (see Note 15 - Pension and Supplemental Executive Retirement Plans for additional details).