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Accumulated Other Comprehensive Income (Loss)
 12 Months Ended
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss)
Note 12.  Accumulated Other Comprehensive Income (Loss)
 
Changes in accumulated other comprehensive income ("AOCI") (loss) by component, including amounts reclassified to other comprehensive income ("OCI") (loss) and the related line item in the Statements of Operations where net income is presented, are as follows for the year ended December 31:
(in thousands)
 
2016
 
2015
 
2014
 
 
Before Tax

Income Tax

Net

 
Before Tax

Income Tax

Net

 
Before Tax

Income Tax

Net

Investment securities:
 
 
 
 
 
 
 
 
 
 
 
 
AOCI, beginning of year
 
$
3,888

$
1,361

$
2,527

 
$
10,473

$
3,666

$
6,807

 
$
9,206

$
3,222

$
5,984

OCI (loss) before reclassifications
 
(385
)
(135
)
(250
)
 
(7,651
)
(2,678
)
(4,973
)
 
1,808

633

1,175

Realized investment losses (gains)
 
35

12

23

 
(492
)
(172
)
(320
)
 
(646
)
(226
)
(420
)
Impairment losses
 
416

146

270

 
1,558

545

1,013

 
105

37

68

OCI (loss)
 
66

23

43

 
(6,585
)
(2,305
)
(4,280
)
 
1,267

444

823

AOCI, end of year
 
$
3,954

$
1,384

$
2,570

 
$
3,888

$
1,361

$
2,527

 
$
10,473

$
3,666

$
6,807

 
 
 
 
 
 
 
 
 
 
 
 
 
Pension and other postretirement plans:
 
 
 
 
 
 
 
 
 
 
 
 
AOCI (loss), beginning of year
 
$
(152,910
)
$
(53,519
)
$
(99,391
)
 
$
(191,552
)
$
(67,044
)
$
(124,508
)
 
$
(100,128
)
$
(35,045
)
$
(65,083
)
OCI (loss) before reclassifications
 
(46,244
)
(16,185
)
(30,059
)
 
24,094

$
8,433

15,661

 
(98,223
)
(34,378
)
(63,845
)
Amortization of prior service costs (1)
 
695

243

452

 
668

234

434

 
709

248

461

Amortization of net actuarial loss (1)
 
7,764

2,717

5,047

 
13,880

4,858

9,022

 
6,090

2,131

3,959

OCI (loss)
 
(37,785
)
(13,225
)
(24,560
)
 
38,642

13,525

25,117

 
(91,424
)
(31,999
)
(59,425
)
AOCI (loss), end of year
 
$
(190,695
)
$
(66,744
)
$
(123,951
)
 
$
(152,910
)
$
(53,519
)
$
(99,391
)
 
$
(191,552
)
$
(67,044
)
$
(124,508
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
AOCI (loss), beginning of year
 
$
(149,022
)
$
(52,158
)
$
(96,864
)
 
$
(181,079
)
$
(63,378
)
$
(117,701
)
 
$
(90,922
)
$
(31,823
)
$
(59,099
)
Investment securities
 
66

23

43

 
(6,585
)
(2,305
)
(4,280
)
 
1,267

444

823

Pension and other postretirement plans
 
(37,785
)
(13,225
)
(24,560
)
 
38,642

13,525

25,117

 
(91,424
)
(31,999
)
(59,425
)
OCI (loss)
 
(37,719
)
(13,202
)
(24,517
)
 
32,057

11,220

20,837

 
(90,157
)
(31,555
)
(58,602
)
AOCI (loss), end of year
 
$
(186,741
)
$
(65,360
)
$
(121,381
)
 
$
(149,022
)
$
(52,158
)
$
(96,864
)
 
$
(181,079
)
$
(63,378
)
$
(117,701
)


(1)
These components of accumulated other comprehensive income (loss) are included in the computation of net periodic pension cost. See Note 8, "Postretirement Benefits", for additional information.