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Change in Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Changes To Accumulated Other Comprehensive Income By Components
Changes to accumulated other comprehensive income (loss) by components are shown in the following tables for the years ended December 31, 2017, 2016, and 2015:
 
Twelve Months Ended
 
December 31,
 
2017
2016
2015
 
Unrealized Gains and Losses on Available for Sale Securities
Change in Benefit Obligations and Plan Assets for the Post Retirement Benefit Plan
Total
Unrealized Gains and Losses on Available for Sale Securities
Change in Benefit Obligations and Plan Assets for the Post Retirement Benefit Plan
Total
Unrealized Gains and Losses on Available for Sale Securities
Change in Fair Value of Interest Rate Swap
Change in Benefit Obligations and Plan Assets for the Post Retirement Benefit Plan
Total
 
(dollars in thousands)
January 1
$
(63
)
$
39

$
(24
)
$
1,012

$
39

$
1,051

$
1,466

$
(190
)
$
39

$
1,315

Other comprehensive income (loss) before reclassifications
422

4

426

(1,531
)
—

(1,531
)
(564
)
52

—

(512
)
Reclassifications from other comprehensive income (loss)
10

(7
)
3

(98
)
—

(98
)
(124
)
237

—

113

Reclassification of stranded tax effects from change in tax rate
44

7

51

—

—

—

—

—

—

—

Tax effect of current period changes
(147
)
1

(146
)
554

—

554

234

(99
)
—

135

Current period changes net of taxes
329

5

334

(1,075
)
—

(1,075
)
(454
)
190

—

(264
)
December 31
$
266

$
44

$
310

$
(63
)
$
39

$
(24
)
$
1,012

$
—

$
39

$
1,051