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Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2016
Equity [Abstract]  
Changes in the components of other comprehensive income
Changes in the components of other comprehensive income, net of tax, were as follows:
 
Pre-Tax
 
Tax  Expense
(Benefit)
 
Net of Tax
Year Ended December 31, 2016
 
 
 
 
 
Securities available for sale:
 
 
 
 
 
Unrealized holding losses on securities
$
(10,119
)
 
$
(3,913
)
 
$
(6,206
)
Reclassification adjustment for gains realized in net income(1)
(1,186
)
 
(459
)
 
(727
)
Amortization of unrealized holding gains on securities transferred to the held to maturity category
(99
)
 
(38
)
 
(61
)
Total securities available for sale
(11,404
)
 
(4,410
)
 
(6,994
)
Derivative instruments:
 
 
 
 
 
Unrealized holding gains on derivative instruments
856

 
329

 
527

Total derivative instruments
856

 
329

 
527

Defined benefit pension and post-retirement benefit plans:
 
 
 
 
 
Net gain arising during the period
51

 
20

 
31

Amortization of net actuarial loss recognized in net periodic pension cost(2)
480

 
178

 
302

Reclassification adjustment for net settlement gain realized in net income(2)
(383
)
 
(148
)
 
(235
)
Total defined benefit pension and post-retirement benefit plans
148

 
50

 
98

Total other comprehensive loss
$
(10,400
)
 
$
(4,031
)
 
$
(6,369
)
Year Ended December 31, 2015
 
 
 
 
 
Securities available for sale:
 
 
 
 
 
Unrealized holding losses on securities
$
(571
)
 
$
(220
)
 
$
(351
)
Reclassification adjustment for gains realized in net income(1)
(96
)
 
(37
)
 
(59
)
Amortization of unrealized holding gains on securities transferred to the held to maturity category
(178
)
 
(68
)
 
(110
)
Total securities available for sale
(845
)
 
(325
)
 
(520
)
Derivative instruments:
 
 
 
 
 
Unrealized holding losses on derivative instruments
(420
)
 
(171
)
 
(249
)
Total derivative instruments
(420
)
 
(171
)
 
(249
)
Defined benefit pension and post-retirement benefit plans:


 


 


Net loss arising during the period
(2,393
)
 
(958
)
 
(1,435
)
Amortization of net actuarial loss recognized in net periodic pension cost(2)
432

 
165

 
267

Total defined benefit pension and post-retirement benefit plans
(1,961
)
 
(793
)
 
(1,168
)
Total other comprehensive loss
$
(3,226
)
 
$
(1,289
)
 
$
(1,937
)

 
Pre-Tax
 
Tax  Expense
(Benefit)
 
Net of Tax
Year Ended December 31, 2014
 
 
 
 
 
Securities available for sale:
 
 
 
 
 
Unrealized holding gains on securities
$
12,520

 
$
4,789

 
$
7,731

Reclassification adjustment for gains realized in net income(1)
(375
)
 
(143
)
 
(232
)
Amortization of unrealized holding gains on securities transferred to the held to maturity category
(253
)
 
(97
)
 
(156
)
Total securities available for sale
11,892

 
4,549

 
7,343

Derivative instruments:
 
 
 
 
 
Unrealized holding losses on derivative instruments
(2,627
)
 
(1,005
)
 
(1,622
)
Total derivative instruments
(2,627
)
 
(1,005
)
 
(1,622
)
Defined benefit pension and post-retirement benefit plans:
 
 
 
 
 
Net loss arising during the period
(2,476
)
 
(947
)
 
(1,529
)
Amortization of net actuarial loss recognized in net periodic pension cost(2)
296

 
113

 
183

Total defined benefit pension and post-retirement benefit plans
(2,180
)
 
(834
)
 
(1,346
)
Total other comprehensive income
$
7,085

 
$
2,710

 
$
4,375


(1) Included in Net gains on sales of securities in the Consolidated Statements of Income
(2) Included in Salaries and employee benefits in the Consolidated Statements of Income
Accumulated balances for each component of other comprehensive income, net of tax
The accumulated balances for each component of other comprehensive income, net of tax, at December 31 were as follows:
 
2016
 
2015
 
2014
Unrealized gains on securities
$
9,490

 
$
16,500

 
$
17,759

Non-credit related portion of other-than-temporary impairment on securities
(16,719
)
 
(16,735
)
 
(17,474
)
Unrealized losses on derivative instruments
(1,355
)
 
(1,882
)
 
(1,633
)
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations
(7,320
)
 
(7,418
)
 
(6,250
)
Total accumulated other comprehensive loss
$
(15,904
)
 
$
(9,535
)
 
$
(7,598
)