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Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Tables)
3 Months Ended
Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
ollowing items are included in accumulated other comprehensive loss:
 
 
 
Pension,
 
 
 
 
 
 
 
Postretirement
 
 
 
 
 
 
 
and Other
 
 
 
Accumulated
 
 
 
Post-
 
 
 
Other
 
Derivative
 
Employment
 
Available-for-
 
Comprehensive
 
Instruments
 
Benefits
 
Sale Securities
 
Loss
 
(In thousands)
Balance at December 31, 2012
$
2,244

 
$
(18,286
)
 
$
(465
)
 
$
(16,507
)
Unrealized gains (losses)
(204
)
 

 
956

 
752

Amounts reclassified from accumulated other comprehensive income
(550
)
 
1,251

 
38

 
739

Balance at March 31, 2013
$
1,490

 
$
(17,035
)
 
$
529

 
$
(15,016
)
Schedule of comprehensive income reclassifications [Table Text Block]
The following items were reclassified out of accumulated other comprehensive loss during the three months ended March 31, 2013:
 
 
Amount Reclassified
 
Affected Line Item in

 
from Accumulated Other
 
the Condensed Consolidated
Details about accumulated other comprehensive income components
 
Comprehensive Loss
 
Statement of Operations
 
 
(In thousands)
 
 
Derivative instruments
 
$
859

 
Revenues
 
 
(309
)
 
Benefit from income taxes
 
 
$
550

 
Net of tax
 
 
 
 
 
Pension, postretirement and other post-employment benefits
 
 
 
 
Amortization of prior service credits
 
$
2,908

 
1 
Amortization of actuarial gains (losses) net
 
(4,862
)
 
1 
 
 
(1,954
)
 
Total before tax
 
 
703

 
Benefit from income taxes
 
 
$
(1,251
)
 
Net of tax
 
 
 
 
 
Available-for-sale securities
 
$
(59
)
 
Interest and investment income
 
 
21

 
Benefit from income taxes
 
 
$
(38
)
 
Net of tax
1 Production-related benefit and workers' compensation costs are included in the costs of coal inventory. See Note 12, "Workers' Compensation Expense" and Note 13"Employee Benefit Plans" for more information about pension, postretirement and postemployment benefit costs.