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Nature of Operations and Basis of Presentation (Tables)
 12 Months Ended
Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Accumulated Balances Related to Components of OCI
The accumulated balances related to each component of other comprehensive loss are as follows: 
(dollars in thousands)
 
December 31, 2015
 
December 31, 2014
 
December 31, 2013
 
 
Pre-tax
 
After-tax
 
Pre-tax
 
After-tax
 
Pre-tax
 
After-tax
Net unrealized securities gains (losses)
 
$
(8,381
)
 
$
(5,176
)
 
$
(4,885
)
 
$
(3,017
)
 
$
(23,443
)
 
$
(14,476
)
Interest rate swaps
 
(754
)
 
(466
)
 
(525
)
 
(324
)
 
—

 
—

Pension and other postretirement benefit plan adjustments
 
(8,255
)
 
(5,097
)
 
(6,696
)
 
(4,134
)
 
(5,068
)
 
(3,129
)
Accumulated other comprehensive loss
 
$
(17,390
)
 
$
(10,739
)
 
$
(12,106
)
 
$
(7,475
)
 
$
(28,511
)
 
$
(17,605
)
The following table presents the changes in our accumulated other comprehensive income (loss), net of tax, by component for the period indicated:

(Dollars in thousands)
 
Unrealized Losses on Available-For-Sale Securities
 
Interest Rate Swaps
 
Defined Benefit Plan Items
 
Total
 
 
 
 
 
 
 
 
 
Beginning balance January 1, 2015
 
$
(3,017
)
 
$
(324
)
 
$
(4,134
)
 
$
(7,475
)
Other comprehensive income (loss) before reclassifications
 
(2,159
)
 
(149
)
 
(1,347
)
 
(3,655
)
Amounts reclassified from accumulated other comprehensive income
 
—

 
7

 
384

 
391

Net current period other comprehensive income (loss)
 
(2,159
)
 
(142
)
 
(963
)
 
(3,264
)
Ending balance December 31, 2015
 
$
(5,176
)
 
$
(466
)
 
$
(5,097
)
 
$
(10,739
)


(Dollars in thousands)
 
Unrealized Gains (Losses) on Available-For-Sale Securities
 
Interest Rate Swaps
 
Defined Benefit Plan Items
 
Total
 
 
 
 
 
 
 
 
 
Beginning balance January 1, 2014
 
$
(14,476
)
 
$
—

 
$
(3,129
)
 
$
(17,605
)
Other comprehensive income (loss) before reclassifications
 
12,060

 
(331
)
 
(1,241
)
 
10,488

Amounts reclassified from accumulated other comprehensive income
 
(601
)
 
7

 
236

 
(358
)
Net current period other comprehensive income (loss)
 
11,459

 
(324
)
 
(1,005
)
 
10,130

Ending balance December 31, 2014
 
$
(3,017
)
 
$
(324
)
 
$
(4,134
)
 
$
(7,475
)