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Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 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):
 
 
 
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 December 31, 2015
$
(29,869
)
 
$
27,765

 
$
(11,810
)
 
$
(13,914
)
 
Other comprehensive income before reclassifications
7,363

 
6,904

 
—

 
14,267

 
Amounts reclassified from accumulated other comprehensive income (loss)
(1,422
)
 
(6,206
)
 
159

 
(7,469
)
Balance at December 31, 2016
(23,928
)
 
28,463

 
(11,651
)
 
(7,116
)
 
Other comprehensive income before reclassifications
7,951

 
20,251

 
—

 
28,202

 
Amounts reclassified from accumulated other comprehensive income (loss)
(1,813
)
 
(8,524
)
 
309

 
(10,028
)
Balance at December 31, 2017
(17,790
)
 
40,190

 
(11,342
)
 
11,058

 
Cumulative effect adjustment
—

 
(41,028
)
 
—

 
(41,028
)
 
Other comprehensive loss before reclassifications
(4,589
)
 
(3,240
)
 
—

 
(7,829
)
 
Amounts reclassified from accumulated other comprehensive income (loss)
(2,544
)
 
1,136

 
423

 
(985
)
Balance at December 31, 2018
$
(24,923
)
 
$
(2,942
)
 
$
(10,919
)
 
$
(38,784
)
Reclassification out of Accumulated Other Comprehensive Income
Amounts reclassified from Accumulated Other Comprehensive Income (Loss) for the twelve months ended December 31, 2018, 2017 and 2016 are as follows (in thousands):
Details about Accumulated Other Comprehensive Income (Loss) Components
 
2018
 
2017
 
2016
 
Affected Line Item in the Statements of Operations
 
 
 
 
 
 
 
 
 
 
 
Amortization of pension and post-retirement benefit costs:
 
 
 
 
 
 
 
 
 
Prior service benefit
 
$
9,657

 
$
9,657

 
$
7,407

 
Miscellaneous non-operating income
 
Net loss
 
(6,387
)
 
(6,776
)
 
(4,965
)
 
Miscellaneous non-operating deductions
 
 
 
 
3,270

 
2,881

 
2,442

 
Income (loss) before income taxes
 
Income tax effect
 
(726
)
 
(1,068
)
 
(1,020
)
 
Income tax (benefit) expense
 
 
 
 
2,544

 
1,813

 
1,422

 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
 
 
Net realized gain (loss) on sale of securities
 
(1,445
)
 
10,626

 
7,640

 
Investment and interest income, net
 
 
 
 
(1,445
)
 
10,626

 
7,640

 
Income (loss) before income taxes
 
Income tax effect
 
309

 
(2,102
)
 
(1,434
)
 
Income tax (benefit) expense
 
 
 
 
(1,136
)
 
8,524

 
6,206

 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
Loss on cash flow hedge:
 
 
 
 
 
 
 
 
 
Amortization of loss
 
(568
)
 
(532
)
 
(498
)
 
Interest on long-term debt and revolving credit facility
 
 
 
 
(568
)
 
(532
)
 
(498
)
 
Income (loss) before income taxes
 
Income tax effect
 
145

 
223

 
339

 
Income tax (benefit) expense
 
 
 
 
(423
)
 
(309
)
 
(159
)
 
Net income (loss)
 
 
 
 
 
 
 
 
 
 
 
 
Total reclassifications
 
$
985

 
$
10,028

 
$
7,469