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Components of Other Comprehensive Income/(Loss)
 12 Months Ended
Dec. 31, 2019
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of Other Comprehensive Income/(Loss) Components of Other Comprehensive Income/(Loss)
The following table provides the changes in accumulated other comprehensive income/(loss) by component, net of tax, for the years ended December 31, 2019, 2018, and 2017:
(Dollars in thousands)
 
Securities AFS
 
Cash Flow
Hedges
 
Pension and
Post-retirement
Plans
 
Total
Balance as of December 31, 2016
 
$
(17,232
)
 
$
(1,265
)
 
$
(229,157
)
 
$
(247,654
)
Net unrealized gains/(losses)
 
(4,467
)
 
(2,156
)
 
(13,377
)
 
(20,000
)
Amounts reclassified from AOCI
 
(298
)
 
(2,945
)
 
5,618

 
2,375

Other comprehensive income/(loss)
 
(4,765
)
 
(5,101
)
 
(7,759
)
 
(17,625
)
Balance as of December 31, 2017
 
(21,997
)
 
(6,366
)
 
(236,916
)
 
(265,279
)
Adjustment to reflect adoption of ASU 2018-02
 
(4,837
)
 
(1,398
)
 
(51,311
)
 
(57,546
)
Balance as of December 31, 2017, as adjusted
 
(26,834
)
 
(7,764
)
 
(288,227
)
 
(322,825
)
Adjustment to reflect adoption of ASU 2016-01 and ASU 2017-12
 
(5
)
 
(206
)
 
—

 
(211
)
Beginning balance, as adjusted
 
(26,839
)
 
(7,970
)
 
(288,227
)
 
(323,036
)
Net unrealized gains/(losses)
 
(48,858
)
 
(6,284
)
 
(9,435
)
 
(64,577
)
Amounts reclassified from AOCI
 
(39
)
 
2,142

 
8,894

 
10,997

Other comprehensive income/(loss)
 
(48,897
)
 
(4,142
)
 
(541
)
 
(53,580
)
Balance as of December 31, 2018
 
(75,736
)
 
(12,112
)
 
(288,768
)
 
(376,616
)
Net unrealized gains/(losses)
 
106,614

 
11,234

 
7,208

 
125,056

Amounts reclassified from AOCI
 
201

 
4,105

 
7,646

 
11,952

Other comprehensive income/(loss)
 
106,815

 
15,339

 
14,854

 
137,008

Balance as of December 31, 2019
 
$
31,079

 
$
3,227

 
$
(273,914
)
 
$
(239,608
)

Reclassifications from AOCI, and related tax effects, were as follows:
(Dollars in thousands)
 
 
 
 
Details about AOCI
 
2019
 
2018
 
2017
 
Affected line item in the statement where net income is presented
Securities AFS:
 
 
 
 
 
 
 
 
Realized (gains)/losses on securities AFS
 
$
267

 
$
(52
)
 
$
(483
)
 
Debt securities gains/(losses), net
Tax expense/(benefit)
 
(66
)
 
13

 
185

 
Provision/(benefit) for income taxes
 
 
201

 
(39
)
 
(298
)
 
 
Cash flow hedges:
 
 
 
 
 
 
 
 
Realized (gains)/losses on cash flow hedges
 
5,452

 
2,845

 
(4,771
)
 
Interest and fees on loans
Tax expense/(benefit)
 
(1,347
)
 
(703
)
 
1,826

 
Provision/(benefit) for income taxes
 
 
4,105

 
2,142

 
(2,945
)
 
 
Pension and Postretirement Plans:
 
 
 
 
 
 
 
 
Amortization of prior service cost and net actuarial gain/(loss)
 
10,156

 
11,814

 
9,101

 
All other expense
Tax expense/(benefit)
 
(2,510
)
 
(2,920
)
 
(3,483
)
 
Provision/(benefit) for income taxes
 
 
7,646

 
8,894

 
5,618

 
 
Total reclassification from AOCI
 
$
11,952

 
$
10,997

 
$
2,375