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OTHER COMPREHENSIVE LOSS
 12 Months Ended
Dec. 31, 2017
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, 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 on borrowings 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 on borrowings 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

 

 
Year Ended December 31, 2015
 
Pre Tax
Amount
 
Tax (Expense)
Benefit
 
After Tax
Amount
 
(Dollars in thousands)
Change in fair value of securities available for sale
$
(3,757
)
 
$
1,434

 
$
(2,323
)
Less: net security losses reclassified into other noninterest income (expense)
(405
)
 
165

 
(240
)
Net change in fair value of securities available for sale
(3,352
)
 
1,269

 
(2,083
)
 
 
 
 
 
 
Change in fair value of cash flow hedges
(776
)
 
299

 
(477
)
Less: Net cash flow hedge losses reclassified into interest on borrowings expense (1)
(2,828
)
 
1,152

 
(1,676
)
Net change in fair value of cash flow hedges
2,052

 
(853
)
 
1,199

 
 
 
 
 
 
Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period
438

 
(193
)
 
245

Amortization of net actuarial losses
243

 
(99
)
 
144

Amortization of net prior service cost
294

 
(119
)
 
175

Net change in other comprehensive income for defined benefit postretirement plans (2)
975

 
(411
)
 
564

Total other comprehensive loss
$
(325
)
 
$
5

 
$
(320
)
(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, will be recognized in earnings through December 2018, the original maturity date of the swap. The balance of this gain had amortized to $137,000, $281,000, and $427,000 at December 31, 2017, 2016, and 2015, 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.
Information on the Company's accumulated other comprehensive 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, 2015
$
3,389

 
$
(3,298
)
 
$
571

 
$
(2,794
)
 
$
(2,132
)
Net change in other comprehensive income (loss)
(2,083
)
 
1,343

 
(144
)
 
564

 
(320
)
Ending balance: December 31, 2015
$
1,306

 
$
(1,955
)
 
$
427

 
$
(2,230
)
 
$
(2,452
)
Net change in other comprehensive income (loss)
(1,133
)
 
2,316

 
(146
)
 
78

 
1,115

Ending balance: December 31, 2016
$
173

 
$
361

 
$
281

 
$
(2,152
)
 
$
(1,337
)
Net change in other comprehensive income (loss)
(677
)
 
587

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

 
$
137

 
$
(2,412
)
 
$
(1,831
)