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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Schedule of Accumulated Other Comprehensive Income (Loss)
              Upon adoption of ASU 2016-01, Financial Instruments-Overall, the Company recorded, on January 1, 2018, a cumulative effect adjustment, net of income taxes, to increase retained earnings by $41.0 million with an offset to AOCI. Changes in Accumulated Other Comprehensive Income (Loss) (net of tax) by component are presented below (in thousands):
 
 
 
Three Months Ended June 30, 2018
 
Three Months Ended June 30, 2017
 
 
 
Unrecognized Pension and Post-retirement Benefit Costs
 
Net Unrealized Gains (Losses) on Debt 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 as previously reported
$
(18,475
)
 
$
(2,593
)
 
$
(11,253
)
 
$
(32,321
)
 
$
(24,457
)
 
$
32,872

 
$
(11,599
)
 
$
(3,184
)
 
Other comprehensive income before reclassifications
—

 
(1,000
)
 
—

 
(1,000
)
 
—

 
3,558

 
—

 
3,558

 
Amounts reclassified from accumulated other comprehensive income (loss)
(649
)
 
115

 
109

 
(425
)
 
(458
)
 
(4,134
)
 
85

 
(4,507
)
Balance at end of period
$
(19,124
)
 
$
(3,478
)
 
$
(11,144
)
 
$
(33,746
)
 
$
(24,915
)
 
$
32,296

 
$
(11,514
)
 
$
(4,133
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Six Months Ended June 30, 2018
 
Six Months Ended June 30, 2017
 
 
 
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 as previously reported
$
(17,790
)
 
$
40,190

 
$
(11,342
)
 
$
11,058

 
$
(23,928
)
 
$
28,463

 
$
(11,651
)
 
$
(7,116
)
 
Cumulative effect adjustment
—

 
(41,028
)
 
—

 
(41,028
)
 
—

 
—

 
—

 
—

 
Other comprehensive income before reclassifications
—

 
(3,159
)
 
—

 
(3,159
)
 
—

 
9,723

 
—

 
9,723

 
Amounts reclassified from accumulated other comprehensive income (loss)
(1,334
)
 
519

 
198

 
(617
)
 
(987
)
 
(5,890
)
 
137

 
(6,740
)
Balance at end of period
$
(19,124
)
 
$
(3,478
)
 
$
(11,144
)
 
$
(33,746
)
 
$
(24,915
)
 
$
32,296

 
$
(11,514
)
 
$
(4,133
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 


 
 
 
Twelve Months Ended June 30, 2018
 
Twelve Months Ended June 30, 2017
 
 
 
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 as previously reported
$
(24,915
)
 
$
32,296

 
$
(11,514
)
 
$
(4,133
)
 
$
(30,532
)
 
$
28,925

 
$
(11,693
)
 
$
(13,300
)
 
Cumulative effect adjustment
—

 
(41,028
)
 
—

 
(41,028
)
 
—

 
—

 
—

 
—

 
Other comprehensive income before reclassifications
7,951

 
7,369

 
—

 
15,320

 
7,363

 
12,661

 
—

 
20,024

 
Amounts reclassified from accumulated other comprehensive income (loss)
(2,160
)
 
(2,115
)
 
370

 
(3,905
)
 
(1,746
)
 
(9,290
)
 
179

 
(10,857
)
Balance at end of period
$
(19,124
)
 
$
(3,478
)
 
$
(11,144
)
 
$
(33,746
)
 
$
(24,915
)
 
$
32,296

 
$
(11,514
)
 
$
(4,133
)
Reclassification out of Accumulated Other Comprehensive Income
Amounts reclassified from Accumulated Other Comprehensive Income (Loss) for the three, six and twelve months ended June 30, 2018 and 2017 are as follows (in thousands):
Details about Accumulated Other Comprehensive Income (Loss) Components
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
Twelve Months Ended June 30,
 
Affected Line Item in the Statements of Operations
 
2018
 
2017
 
2018
 
2017
 
2018
 
2017
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of pension and post-retirement benefit costs:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Prior service benefit
 
$
2,414

 
$
2,413

 
$
4,830

 
$
4,829

 
$
9,658

 
$
8,906

 
Miscellaneous non-operating income
 
Net loss
 
(1,575
)
 
(1,694
)
 
(3,150
)
 
(3,388
)
 
(6,538
)
 
(5,908
)
 
Miscellaneous non-operating deductions
 
 
 
 
839

 
719

 
1,680

 
1,441

 
3,120

 
2,998

 
Income (loss) before income taxes
 
Income tax effect
 
(190
)
 
(261
)
 
(346
)
 
(454
)
 
(960
)
 
(1,252
)
 
Income tax (benefit) expense
 
 
 
 
649

 
458

 
1,334

 
987

 
2,160

 
1,746

 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net realized gain (loss) on sale of securities
 
(147
)
 
5,166

 
(665
)
 
7,357

 
2,604

 
11,499

 
Investment and interest income, net
 
 
 
 
(147
)
 
5,166

 
(665
)
 
7,357

 
2,604

 
11,499

 
Income (loss) before income taxes
 
Income tax effect
 
32

 
(1,032
)
 
146

 
(1,467
)
 
(489
)
 
(2,209
)
 
Income tax (benefit) expense
 
 
 
 
(115
)
 
4,134

 
(519
)
 
5,890

 
2,115

 
9,290

 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Loss on cash flow hedge:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amortization of loss
 
(140
)
 
(132
)
 
(279
)
 
(262
)
 
(549
)
 
(515
)
 
Interest on long-term debt and revolving credit facility
 
 
 
 
(140
)
 
(132
)
 
(279
)
 
(262
)
 
(549
)
 
(515
)
 
Income (loss) before income taxes
 
Income tax effect
 
31

 
47

 
81

 
125

 
179

 
336

 
Income tax (benefit) expense
 
 
 
 
(109
)
 
(85
)
 
(198
)
 
(137
)
 
(370
)
 
(179
)
 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications
 
$
425

 
$
4,507

 
$
617

 
$
6,740

 
$
3,905

 
$
10,857