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Accumulated Other Comprehensive Loss, Net of Tax
 9 Months Ended
Sep. 30, 2017
Equity [Abstract]  
Accumulated Other Comprehensive Loss, Net of Tax Accumulated Other Comprehensive Loss, Net of Tax
The following tables summarize the changes in AOCL by component:
 
Three months ended September 30, 2017
 
Nine months ended September 30, 2017
(In thousands)
Securities Available For Sale and Transferred
Derivative Instruments
Defined Benefit Pension and Other Postretirement Benefit Plans
Total
 
Securities Available For Sale and Transferred
Derivative Instruments
Defined Benefit Pension and Other Postretirement Benefit Plans
Total
Beginning balance
$
(14,501
)
$
(15,258
)
$
(42,323
)
$
(72,082
)
 
$
(15,476
)
$
(17,068
)
$
(44,449
)
$
(76,993
)
  OCI/OCL before reclassifications
872

(34
)
—

838

 
1,847

(445
)
—

1,402

  Amounts reclassified from AOCL
—

1,145

1,001

2,146

 
—

3,366

3,127

6,493

Net current-period OCI/OCL
872

1,111

1,001

2,984

 
1,847

2,921

3,127

7,895

Ending balance
$
(13,629
)
$
(14,147
)
$
(41,322
)
$
(69,098
)
 
$
(13,629
)
$
(14,147
)
$
(41,322
)
$
(69,098
)
 
Three months ended September 30, 2016
 
Nine months ended September 30, 2016
(In thousands)
Securities Available For Sale and Transferred
Derivative Instruments
Defined Benefit Pension and Other Postretirement Benefit Plans
Total
 
Securities Available For Sale and Transferred
Derivative Instruments
Defined Benefit Pension and Other Postretirement Benefit Plans
Total
Beginning balance
$
12,363

$
(23,406
)
$
(46,468
)
$
(57,511
)
 
$
(6,407
)
$
(22,980
)
$
(48,719
)
$
(78,106
)
  OCI/OCL before reclassifications
1,218

794

—

2,012

 
20,156

(2,416
)
—

17,740

  Amounts reclassified from AOCL
—

1,221

1,125

2,346

 
(168
)
4,005

3,376

7,213

Net current-period OCI/OCL
1,218

2,015

1,125

4,358

 
19,988

1,589

3,376

24,953

Ending balance
$
13,581

$
(21,391
)
$
(45,343
)
$
(53,153
)
 
$
13,581

$
(21,391
)
$
(45,343
)
$
(53,153
)

The following tables provide information for the items reclassified from AOCL:
(In thousands)
Three months ended September 30,
 
Nine months ended September 30,
Associated Line Item in the Condensed Consolidated Statements of Income
AOCL Components
2017
 
2016
 
2017
 
2016
 
 
 
 
 
 
 
 
 
Securities available-for-sale and transferred:
 
 
 
 
 
 
 
 
Unrealized gains (losses) on investment securities
$
—

 
$
—

 
$
—

 
$
414

Gain on sale of investment securities, net
Unrealized gains (losses) on investment securities
—

 
—

 
—

 
(149
)
Impairment loss recognized in earnings
Total before tax
—

 
—

 
—

 
265

 
Tax benefit (expense)
—

 
—

 
—

 
(97
)
Income tax expense
Net of tax
$
—

 
$
—

 
$
—

 
$
168

 
Derivative instruments:
 
 
 
 
 
 
 
 
Cash flow hedges
$
(1,810
)
 
$
(1,925
)
 
$
(5,316
)
 
$
(6,314
)
Total interest expense
Tax benefit
665

 
704

 
1,950

 
2,309

Income tax expense
Net of tax
$
(1,145
)
 
$
(1,221
)
 
$
(3,366
)
 
$
(4,005
)
 
Defined benefit pension and other postretirement benefit plans:
 
 
 
 
 
 
 
 
Amortization of net loss
$
(1,587
)
 
$
(1,780
)
 
$
(4,959
)
 
$
(5,343
)
(1)
Prior service costs
—

 
(4
)
 
—

 
(11
)
(1)
Total before tax
(1,587
)
 
(1,784
)
 
(4,959
)
 
(5,354
)
 
Tax benefit
586

 
659

 
1,832

 
1,978

Income tax expense
Net of tax
$
(1,001
)
 
$
(1,125
)
 
$
(3,127
)
 
$
(3,376
)
 

(1) These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost (see Note 14 - Retirement Benefit Plans for further details).