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Other Comprehensive Income (Tables)
 9 Months Ended
Sep. 30, 2013
Equity [Abstract]  
Changes in the components of other comprehensive income
Changes in the components of other comprehensive income were as follows for the periods presented:
 
 
Pre-Tax
 
Tax Expense
(Benefit)
 
Net of Tax
Three months ended September 30, 2013
 
 
 
 
 
Securities available for sale:
 
 
 
 
 
Unrealized holding losses on securities
$
1,269

 
$
487

 
$
782

Non-credit related portion of other-than-temporary impairment on securities
—

 
—

 
—

Reclassification adjustment for gains realized in net income
—

 
—

 
—

Amortization of unrealized holding gains on securities transferred to the held to maturity category
(80
)
 
(31
)
 
(49
)
Total securities available for sale
1,189

 
456

 
733

Derivative instruments:
 
 
 
 
 
Unrealized holding gains on derivative instruments
(481
)
 
(184
)
 
(297
)
Reclassification adjustment for gains realized in net income
(35
)
 
(13
)
 
(22
)
Total derivative instruments
(516
)
 
(197
)
 
(319
)
Defined benefit pension and post-retirement benefit plans:
 
 
 
 
 
Net gain (loss) arising during the period
—

 
—

 
—

Amortization of net actuarial loss recognized in net periodic pension cost
183

 
70

 
113

Total defined benefit pension and post-retirement benefit plans
183

 
70

 
113

Total other comprehensive income
$
856

 
$
329

 
$
527

Three months ended September 30, 2012
 
 
 
 
 
Securities available for sale:
 
 
 
 
 
Unrealized holding gains on securities
$
4,025

 
$
1,539

 
$
2,486

Non-credit related portion of other-than-temporary impairment on securities
—

 
—

 
—

Reclassification adjustment for gains realized in net income
—

 
—

 
—

Amortization of unrealized holding gains on securities transferred to the held to maturity category
(134
)
 
(51
)
 
(83
)
Total securities available for sale
3,891

 
1,488

 
2,403

Derivative instruments:
 
 
 
 
 
Unrealized holding losses on derivative instruments
(391
)
 
(150
)
 
(241
)
Reclassification adjustment for gains realized in net income
(115
)
 
(44
)
 
(71
)
Total derivative instruments
(506
)
 
(194
)
 
(312
)
Defined benefit pension and post-retirement benefit plans:
 
 
 
 
 
Net gain (loss) arising during the period
—

 
—

 
—

Amortization of net actuarial loss recognized in net periodic pension cost
107

 
41

 
66

Total defined benefit pension and post-retirement benefit plans
107

 
41

 
66

Total other comprehensive income
$
3,492

 
$
1,335

 
$
2,157


 
Pre-Tax
 
Tax Expense
(Benefit)
 
Net of Tax
Nine months ended September 30, 2013
 
 
 
 
 
Securities available for sale:
 
 
 
 
 
Unrealized holding losses on securities
$
(9,864
)
 
$
(3,773
)
 
$
(6,091
)
Non-credit related portion of other-than-temporary impairment on securities
—

 
—

 
—

Reclassification adjustment for losses realized in net income
115

 
44

 
71

Amortization of unrealized holding gains on securities transferred to the held to maturity category
(274
)
 
(105
)
 
(169
)
Total securities available for sale
(10,023
)
 
(3,834
)
 
(6,189
)
Derivative instruments:
 
 
 
 
 
Unrealized holding gains on derivative instruments
1,461

 
559

 
902

Reclassification adjustment for gains realized in net income
(203
)
 
(77
)
 
(126
)
Total derivative instruments
1,258

 
482

 
776

Defined benefit pension and post-retirement benefit plans:
 
 
 
 
 
Net gain (loss) arising during the period
—

 
—

 
—

Amortization of net actuarial loss recognized in net periodic pension cost
437

 
167

 
270

Total defined benefit pension and post-retirement benefit plans
437

 
167

 
270

Total other comprehensive income
$
(8,328
)
 
$
(3,185
)
 
$
(5,143
)
Nine months ended September 30, 2012
 
 
 
 
 
Securities available for sale:
 
 
 
 
 
Unrealized holding gains on securities
$
7,439

 
$
2,845

 
$
4,594

Non-credit related portion of other-than-temporary impairment on securities
—

 
—

 
—

Reclassification adjustment for gains realized in net income
(1,773
)
 
(678
)
 
(1,095
)
Amortization of unrealized holding gains on securities transferred to the held to maturity category
(447
)
 
(171
)
 
(276
)
Total securities available for sale
5,219

 
1,996

 
3,223

Derivative instruments:
 
 
 
 
 
Unrealized holding losses on derivative instruments
(2,234
)
 
(855
)
 
(1,379
)
Reclassification adjustment for gains realized in net income
(419
)
 
(160
)
 
(259
)
Total derivative instruments
(2,653
)
 
(1,015
)
 
(1,638
)
Defined benefit pension and post-retirement benefit plans:
 
 
 
 
 
Net gain (loss) arising during the period
—

 
—

 
—

Amortization of net actuarial loss recognized in net periodic pension cost
321

 
123

 
198

Total defined benefit pension and post-retirement benefit plans
321

 
123

 
198

Total other comprehensive income
$
2,887

 
$
1,104

 
$
1,783
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, were as follows as of the dates presented:
 
 
September 30,
2013
 
December 31, 2012
Unrealized gains on securities
$
11,239

 
$
17,428

Non-credit related portion of other-than-temporary impairment on securities
(17,474
)
 
(17,474
)
Unrealized losses on derivative instruments
(435
)
 
(1,211
)
Unrecognized defined benefit pension and post-retirement benefit plans obligations
(6,974
)
 
(7,244
)
Total accumulated other comprehensive loss
$
(13,644
)
 
$
(8,501
)