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Accumulated Other Comprehensive Income
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income

The following items are included in accumulated other comprehensive income (loss):
 
 
 
 
 
 
 
 
 
 
 
Pension,
 
 
 
 
 
 
 
Postretirement
 
 
 
Accumulated
 
 
 
and Other Post-
 
 
 
Other
 
Derivative
 
Employment
 
Available-for-
 
Comprehensive
 
Instruments
 
Benefits
 
Sale Securities
 
Income (Loss)
 
(In thousands)
January 1, 2017
$
—

 
$
24,067

 
$
387

 
$
24,454

Unrealized gains (losses)
497

 
(3,589
)
 
—

 
(3,092
)
Amounts reclassified from accumulated other comprehensive income (loss)
150

 
(758
)
 
(387
)
 
(995
)
December 31, 2017
$
647

 
$
19,720

 
$
—

 
$
20,367

Unrealized gains (losses)
(4,359
)
 
22,923

 
(319
)
 
18,245

Amounts reclassified from accumulated other comprehensive income (loss)
7,040

 
(2,332
)
 
(24
)
 
4,684

December 31, 2018
$
3,328

 
$
40,311

 
$
(343
)
 
$
43,296



The following amounts were reclassified out of accumulated other comprehensive income during the respective periods:

Details about accumulated
other comprehensive income components
 
Year Ended December 31, 2018
 
Year Ended December 31, 2017
 
Line Item in the
 Consolidated Income Statements
(in thousands)
 
 
 
 
 
 
Derivative instruments
 


 


 
 
Coal hedges
 
$
(8,206
)
 
$
—

 
Revenues
Interest rate hedges
 
1,166

 
(150
)
 
Interest expense
 
 
—

 
—

 
Provision for (benefit from) income taxes
 
 
$
(7,040
)
 
$
(150
)
 
Net of tax
 
 
 
 
 
 
 
Pension, postretirement and other post-employment benefits
 
 
 
 
 
 
Curtailments
 
$
—

 
$
(773
)
 
 
Settlement gains
 
2,332

 
1,531

 
 
 
 
$
2,332

 
$
758

 
Total before tax
 
 
—

 
—

 
Provision for (benefit from) income taxes
 
 
$
2,332

 
$
758

 
Net of tax
 
 
 
 
 
 
 
Available-for-sale securities 2
 
$
24

 
$
387

 
Interest and investment income
 
 
—

 
—

 
Provision for (benefit from) income taxes
 
 
$
24

 
$
387

 
Net of tax
1 Production-related benefits and workers’ compensation costs are included in costs to produce coal.
2 The gains and losses on sales of available-for-sale-securities are determined on a specific identification basis.