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Other Comprehensive (Loss) Income
 3 Months Ended
Mar. 31, 2018
Equity [Abstract]  
Other Comprehensive (Loss) Income
Other Comprehensive (Loss) Income
The following table presents the components of other comprehensive (loss) income, both gross and net of tax, for the three months ended March 31, 2018 and 2017 (in thousands):
 
 
Three months ended March 31,
 
 
2018
 
2017
 
 
Before
Tax
 
Tax
Effect
 
After
Tax
 
Before
Tax
 
Tax
Effect
 
After
Tax
Components of Other Comprehensive Income:
 
 
 
 
 
 
 
 
 
 
 
 
Unrealized gains and losses on available for sale debt securities:
 
 
 
 
 
 
 
 
 
 
 
 
Net (losses) gains arising during the period
 
$
(13,093
)
 
3,454

 
(9,639
)
 
1,287

 
(516
)
 
771

Reclassification adjustment for gains included in net income
 
—

 
—

 
—

 
—

 
—

 
—

Total
 
(13,093
)
 
3,454

 
(9,639
)
 
1,287

 
(516
)
 
771

Unrealized gains on derivatives (cash flow hedges)
 
720

 
(190
)
 
530

 
92

 
(37
)
 
55

Amortization related to post-retirement obligations
 
84

 
(22
)
 
62

 
53

 
(21
)
 
32

Total other comprehensive (loss) income
 
$
(12,289
)
 
3,242

 
(9,047
)
 
1,432

 
(574
)
 
858

The following table presents the changes in the components of accumulated other comprehensive (loss) income, net of tax, for the three months ended March 31, 2018 and 2017 (in thousands):
 
 
Changes in Accumulated Other Comprehensive Income (Loss) by Component, net of tax
for the three months ended March 31
 
 
2018
 
2017
 
 
Unrealized
Losses on
Available for 
Sale Debt Securities
 
Post- Retirement
Obligations
 
Unrealized gains on Derivatives (cash flow hedges)
 
Accumulated
Other
Comprehensive Loss
 
Unrealized
(Losses) Gains on
Available  for 
Sale Debt Securities
 
Post-  Retirement
Obligations
 
Unrealized (losses) on Derivatives (cash flow hedges)
 
Accumulated
Other
Comprehensive
(Loss) Income
Balance at
December 31,
 
$
(3,292
)
 
(4,846
)
 
673

 
(7,465
)
 
(510
)
 
(3,056
)
 
169

 
(3,397
)
Current period other comprehensive (loss) income
 
(9,639
)
 
62

 
530

 
(9,047
)
 
771

 
32

 
55

 
858

Reclassification of unrealized gains on equity securities due to the adoption of ASU No. 2016-01
 
(184
)
 
—

 
—

 
(184
)
 
—

 
—

 
—

 
—

Balance at March 31,
 
$
(13,115
)
 
(4,784
)
 
1,203

 
(16,696
)
 
261

 
(3,024
)
 
224

 
(2,539
)

The following table summarizes the reclassifications out of accumulated other comprehensive income to the consolidated statements of income for the three months ended March 31, 2018 and 2017 (in thousands):
 
 
Reclassifications From Accumulated Other Comprehensive
Income ("AOCI")
 
 
Amount reclassified from AOCI for the three months ended March 31,
 
Affected line item in the Consolidated
Statement of Income
 
 
2018
 
2017
 
Details of AOCI:
 
 
 
 
 
 
Post-retirement obligations:
 
 
 
 
 
 
Amortization of actuarial losses
 
$
100

 
61

 
Compensation and employee benefits (1)
 
 
(26
)
 
(24
)
 
Income tax expense
 
 
$
74

 
37

 
Net of tax
Total reclassifications
 
$
74

 
37

 
Net of tax

(1) 
This item is included in the computation of net periodic benefit cost. See Note 5. Components of Net Periodic Benefit Cost.