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Nature of Operations and Basis of Presentation (Tables)
 12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Accumulated balanced related to each component of other comprehensive loss
The accumulated balances related to each component of other comprehensive loss are as follows: 
(dollars in thousands)
 
December 31, 2014
 
December 31, 2013
 
December 31, 2012
 
 
Pre-tax
 
After-tax
 
Pre-tax
 
After-tax
 
Pre-tax
 
After-tax
Net unrealized securities gains (losses)
 
$
(4,885
)
 
$
(3,017
)
 
$
(23,443
)
 
$
(14,476
)
 
$
6,032

 
$
3,650

Interest rate swaps
 
(525
)
 
(324
)
 
—

 
—

 
—

 
—

Pension, other postretirement and postemployment benefit plan adjustments
 
(6,696
)
 
(4,134
)
 
(5,068
)
 
(3,129
)
 
(6,566
)
 
(3,973
)
Accumulated other comprehensive loss
 
$
(12,106
)
 
$
(7,475
)
 
$
(28,511
)
 
$
(17,605
)
 
$
(534
)
 
$
(323
)
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 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
)


(Dollars in thousands)
 
Unrealized Gains (Losses) on Available-For-Sale Securities
 
Defined Benefit Plan Items
 
Total
 
 
 
 
 
 
 
Beginning balance January 1, 2013
 
$
3,650

 
$
(3,973
)
 
$
(323
)
Other comprehensive income (loss) before reclassifications
 
(16,447
)
 
1,031

 
(15,416
)
Amounts reclassified from accumulated other comprehensive income
 
(1,679
)
 
(187
)
 
(1,866
)
Net current period other comprehensive income (loss)
 
(18,126
)
 
844

 
(17,282
)
Ending balance December 31, 2013
 
$
(14,476
)
 
$
(3,129
)
 
$
(17,605
)