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OTHER COMPREHENSIVE LOSS
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
OTHER COMPREHENSIVE LOSS OTHER COMPREHENSIVE INCOME (LOSS)
The following table presents a reconciliation of the changes in the components of other comprehensive income (loss) for the dates indicated, including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss):
 
December 31, 2018
 
Pre Tax
Amount
 
Tax (Expense)
Benefit
 
After Tax
Amount
 
(Dollars in thousands)
Change in fair value of securities available for sale
$
(5,923
)
 
$
1,422

 
$
(4,501
)
Less: net security gains reclassified into other noninterest income (expense)
—

 
—

 
—

Net change in fair value of securities available for sale
(5,923
)
 
1,422

 
(4,501
)
 
 
 
 
 
 
Change in fair value of cash flow hedges
7,717

 
(2,169
)
 
5,548

Less: net cash flow hedge gains reclassified into interest income or interest expense (1)
1,000

 
(281
)
 
719

Net change in fair value of cash flow hedges
6,717

 
(1,888
)
 
4,829

 
 
 
 
 
 
Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period
1,521

 
(428
)
 
1,093

Amortization of net actuarial losses
372

 
(105
)
 
267

Amortization of net prior service cost
276

 
(78
)
 
198

Net change in other comprehensive income for defined benefit postretirement plans (2)
2,169

 
(611
)
 
1,558

Total other comprehensive income
$
2,963

 
$
(1,077
)
 
$
1,886

 
 
 
 
 
 
 
Year Ended December 31, 2017
 
Pre Tax
Amount
 
Tax (Expense)
Benefit
 
After Tax
Amount
 
(Dollars in thousands)
Change in fair value of securities available for sale
$
(996
)
 
$
321

 
$
(675
)
Less: net security gains reclassified into other noninterest income (expense)
3

 
(1
)
 
2

Net change in fair value of securities available for sale
(999
)
 
322

 
(677
)
 
 
 
 
 
 
Change in fair value of cash flow hedges
307

 
(125
)
 
182

Less: net cash flow hedge losses reclassified into interest income or interest expense (1)
(441
)
 
180

 
(261
)
Net change in fair value of cash flow hedges
748

 
(305
)
 
443

 
 
 
 
 
 
Net unamortized loss related to defined benefit pension and other postretirement adjustments arising during the period
(995
)
 
407

 
(588
)
Amortization of net actuarial losses
278

 
(113
)
 
165

Amortization of net prior service cost
276

 
(113
)
 
163

Net change in other comprehensive income for defined benefit postretirement plans (2)
(441
)
 
181

 
(260
)
Total other comprehensive loss
$
(692
)
 
$
198

 
$
(494
)
 

 
Year Ended December 31, 2016
 
Pre Tax
Amount
 
Tax (Expense)
Benefit
 
After Tax
Amount
 
(Dollars in thousands)
Change in fair value of securities available for sale
$
(1,858
)
 
$
710

 
$
(1,148
)
Less: net security losses reclassified into other noninterest income (expense)
(26
)
 
11

 
(15
)
Net change in fair value of securities available for sale
(1,832
)
 
699

 
(1,133
)
 
 
 
 
 
 
Change in fair value of cash flow hedges
1,133

 
(453
)
 
680

Less: net cash flow hedge losses reclassified into interest income or interest expense (1)
(2,520
)
 
1,030

 
(1,490
)
Net change in fair value of cash flow hedges
3,653

 
(1,483
)
 
2,170

 
 
 
 
 
 
Net unamortized loss related to defined benefit pension and other postretirement adjustments arising during the period
(383
)
 
157

 
(226
)
Amortization of net actuarial losses
238

 
(97
)
 
141

Amortization of net prior service cost
276

 
(113
)
 
163

Net change in other comprehensive income for defined benefit postretirement plans (2)
131

 
(53
)
 
78

Total other comprehensive income
$
1,952

 
$
(837
)
 
$
1,115

(1)
Includes the amortization of the remaining balance of a realized but unrecognized gain, net of tax, from the termination of interest rate swaps in 2009. The original gain of $1.4 million, net of tax, was recognized in earnings through December 2018, the original maturity date of the swap. The balance of this gain was fully amortized into earnings at December 31, 2018. The balance of the gain was amortized to $137,000, and $281,000 at December 31, 2017 and 2016, respectively.
(2)
The amortization of prior service costs is included in the computation of net periodic pension costs as disclosed in Note 15 - Employee Benefit Plans.
Effective January 1, 2018, the Company elected to reclassify certain tax effects from accumulated other comprehensive income to retained earnings, related to items that were stranded in other comprehensive income as a result of the Tax Act. A description of the other income tax effects that were reclassified as a result of the Tax Act are listed in the table below.
Information on the Company's accumulated other comprehensive income (loss), net of tax, is comprised of the following components as of the periods indicated:
 
Unrealized Gain (Loss) on Securities
 
Unrealized Gain (Loss) on Cash Flow Hedge
 
Deferred Gain on Hedge Transactions
 
Defined Benefit Postretirement Plans
 
Accumulated Other Comprehensive Income (Loss)
 
(Dollars in Thousands)
Beginning balance: January 1, 2016
$
1,306

 
$
(1,955
)
 
$
427

 
$
(2,230
)
 
$
(2,452
)
Other comprehensive income (loss)
(1,133
)
 
2,316

 
(146
)
 
78

 
1,115

Ending balance: December 31, 2016
$
173

 
$
361

 
$
281

 
$
(2,152
)
 
$
(1,337
)
Other comprehensive income (loss)
(677
)
 
587

 
(144
)
 
(260
)
 
(494
)
Ending balance: December 31, 2017
$
(504
)
 
$
948

 
$
137

 
$
(2,412
)
 
$
(1,831
)
Opening balance reclassification
(111
)
 
205

 
29

 
(520
)
 
(397
)
Cumulative effect accounting adjustment
(831
)
 
—

 
—

 
—

 
(831
)
Other comprehensive income (loss)
(4,501
)
 
4,995

 
(166
)
 
1,558

 
1,886

Ending balance: December 31, 2018
$
(5,947
)
 
$
6,148

 
$
—

 
$
(1,374
)
 
$
(1,173
)