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Accumulated Other Comprehensive Income (Notes)
 9 Months Ended
Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Comprehensive Income (Loss) Note
Accumulated Other Comprehensive Income (Loss)
       Changes in Accumulated Other Comprehensive Income (Loss) (net of tax) by component are presented below (in thousands):
 
 
 
Three Months Ended September 30, 2016
 
Three Months Ended September 30, 2015
 
 
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
$
(30,532
)
 
$
28,925

 
$
(11,693
)
 
$
(13,300
)
 
$
(34,331
)
 
$
35,726

 
$
(11,959
)
 
$
(10,564
)
 
Other comprehensive income (loss) before reclassifications
—

 
3,493

 
—

 
3,493

 
—

 
(6,485
)
 
—

 
(6,485
)
 
Amounts reclassified from accumulated other comprehensive income (loss)
(804
)
 
(1,687
)
 
(39
)
 
(2,530
)
 
226

 
(3,472
)
 
72

 
(3,174
)
Balance at end of period
$
(31,336
)
 
$
30,731

 
$
(11,732
)
 
$
(12,337
)
 
$
(34,105
)
 
$
25,769

 
$
(11,887
)
 
$
(20,223
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2016
 
Nine Months Ended September 30, 2015
 
 
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
$
(29,869
)
 
$
27,765

 
$
(11,810
)
 
$
(13,914
)
 
$
(34,884
)
 
$
38,957

 
$
(12,074
)
 
$
(8,001
)
 
Other comprehensive income (loss) before reclassifications
—

 
7,459

 
—

 
7,459

 
—

 
(6,854
)
 
—

 
(6,854
)
 
Amounts reclassified from accumulated other comprehensive income (loss)
(1,467
)
 
(4,493
)
 
78

 
(5,882
)
 
779

 
(6,334
)
 
187

 
(5,368
)
Balance at end of period
$
(31,336
)
 
$
30,731

 
$
(11,732
)
 
$
(12,337
)
 
$
(34,105
)
 
$
25,769

 
$
(11,887
)
 
$
(20,223
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Twelve Months Ended September 30, 2016
 
Twelve Months Ended September 30, 2015
 
 
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Marketable Securities
 
Net Losses on Cash Flow Hedges
 
Accumulated Other Comprehensive Income (Loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
$
(34,105
)
 
$
25,769

 
$
(11,887
)
 
$
(20,223
)
 
$
(9,818
)
 
$
39,525

 
$
(12,146
)
 
$
17,561

 
Other comprehensive income (loss) before reclassifications
3,777

 
12,058

 
—

 
15,835

 
(24,775
)
 
(4,537
)
 
—

 
(29,312
)
 
Amounts reclassified from accumulated other comprehensive income (loss)
(1,008
)
 
(7,096
)
 
155

 
(7,949
)
 
488

 
(9,219
)
 
259

 
(8,472
)
Balance at end of period
$
(31,336
)
 
$
30,731

 
$
(11,732
)
 
$
(12,337
)
 
$
(34,105
)
 
$
25,769

 
$
(11,887
)
 
$
(20,223
)

Amounts reclassified from Accumulated Other Comprehensive Income (Loss) for the three, nine and twelve months ended September 30, 2016 and 2015 are as follows (in thousands):
Details about Accumulated Other Comprehensive Income (Loss) Components
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
Twelve Months Ended September 30,
 
Affected Line Item in the Statement of Operations
 
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of pension and post-retirement benefit costs:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Prior service benefit
 
$
1,663

 
$
1,606

 
$
4,993

 
$
4,931

 
$
6,636

 
$
6,996

 
(a)
 
Net loss
 
(1,087
)
 
(1,966
)
 
(3,532
)
 
(6,466
)
 
(5,688
)
 
(8,081
)
 
(a)
 
 
 
 
576

 
(360
)
 
1,461

 
(1,535
)
 
948

 
(1,085
)
 
(a)
 
Income tax effect
 
228

 
134

 
6

 
756

 
60

 
597

 
Income tax expense
 
 
 
 
804

 
(226
)
 
1,467

 
(779
)
 
1,008

 
(488
)
 
(a)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net realized gain on sale of securities
 
2,072

 
4,324

 
5,570

 
7,887

 
8,797

 
11,446

 
Investment and interest income, net
 
 
 
 
2,072

 
4,324

 
5,570

 
7,887

 
8,797

 
11,446

 
Income before income taxes
 
Income tax effect
 
(385
)
 
(852
)
 
(1,077
)
 
(1,553
)
 
(1,701
)
 
(2,227
)
 
Income tax expense
 
 
 
 
1,687

 
3,472

 
4,493

 
6,334

 
7,096

 
9,219

 
Net income
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Loss on cash flow hedge:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of loss
 
(126
)
 
(118
)
 
(371
)
 
(348
)
 
(490
)
 
(460
)
 
Interest on long-term debt and revolving credit facility
 
 
 
 
(126
)
 
(118
)
 
(371
)
 
(348
)
 
(490
)
 
(460
)
 
Income before income taxes
 
Income tax effect
 
165

 
46

 
293

 
161

 
335

 
201

 
Income tax expense
 
 
 
 
39

 
(72
)
 
(78
)
 
(187
)
 
(155
)
 
(259
)
 
Net income
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications
 
$
2,530

 
$
3,174

 
$
5,882

 
$
5,368

 
$
7,949

 
$
8,472

 
 
 
 
(a) These items are included in the computation of net periodic benefit cost. See Note I, Employee Benefits, for additional information.