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Comprehensive Income (Tables)
 3 Months Ended
Mar. 31, 2018
Equity [Abstract]  
Components of Other Comprehensive Income (Loss)
The components of other comprehensive income (loss) are as follows:
 
March 31, 2018
 
March 31, 2017
For the quarter ended:
Before
Tax Amount
 
Tax Benefit
(Expense)
 
Net of
Tax Amount
 
Before
Tax Amount
 
Tax Benefit
(Expense)
 
Net of
Tax Amount
 
(in thousands)
 
(in thousands)
Net unrealized gains (losses) on available for sale securities
 
 
 
 
 
 
 
 
 
 
 
Net unrealized holding (losses) gains arising during period
$
(7,502
)
 
$
1,770

 
$
(5,732
)
 
$
1,184

 
$
(450
)
 
$
734

Reclassification adjustment for net gains arising during the period
—

 
—

 
—

 
(2,539
)
 
890

 
(1,649
)
Net unrealized losses
(7,502
)
 
1,770

 
(5,732
)
 
(1,355
)
 
440

 
(915
)
Unrealized gains on derivatives
358

 
(75
)
 
283

 
21

 
(7
)
 
14

Other comprehensive loss, net
$
(7,144
)
 
$
1,695

 
$
(5,449
)
 
$
(1,334
)
 
$
433

 
$
(901
)
Summary of Changes in Components of Other Comprehensive Income, Net of Tax
The following table shows the changes in the balances of each of the components of other comprehensive income for the periods presented, net of tax (in thousands):
 
For the Three Months Ended March 31, 2018
 
For the Three Months Ended March 31, 2017
 
Unrealized
Losses on
Available for Sale
Securities
 
Unrealized
Gains
on Derivatives
 
Pension Items
 
Total
 
Unrealized
Gains (Losses) on
Available for Sale
Securities
 
Unrealized
Gains 
on Derivatives
 
Pension Items
 
Total
Beginning balance
$
(3,232
)
 
$
862

 
$
21

 
$
(2,349
)
 
$
(117
)
 
$
672

 
$
38

 
$
593

Adjustment for implementation of ASU 2016-01
(2,043
)
 
—

 
—

 
(2,043
)
 
—

 
—

 
—

 
—

Adjusted beginning balance
(5,275
)
 
862

 
21

 
(4,392
)
 
(117
)
 
672

 
38

 
593

Other comprehensive income (loss) before classifications
(5,732
)
 
283

 
—

 
(5,449
)
 
734

 
14

 
—

 
748

Amounts reclassified from accumulated other comprehensive income
—

 
—

 
—

 
—

 
(1,649
)
 
—

 
—

 
(1,649
)
Net current period other comprehensive income (loss)
(5,732
)
 
283

 
—

 
(5,449
)
 
(915
)
 
14

 
—

 
(901
)
Ending balance
$
(11,007
)
 
$
1,145

 
$
21

 
$
(9,841
)
 
$
(1,032
)
 
686

 
$
38

 
$
(308
)