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Derivatives (Tables)
 12 Months Ended
Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Price Risk Derivatives
At December 31, 2018, the Company held derivatives for risk management purposes that are expected to settle in the following years:
 
(Tons in thousands)
 
2019
 
2020
 
Total
Coal sales
 
2,601

 
93

 
2,694

Coal purchases
 
1,368

 
93

 
1,461
Disclosure Of Fair Value Of Derivatives
 The fair value and location of derivatives reflected in the accompanying consolidated balance sheets are as follows:
 
 
December 31, 2018
 
 
 
December 31, 2017
 
 
Fair Value of Derivatives
 
Asset
 
Liability
 
 
 
Asset
 
Liability
 
 
(In thousands)
 
Derivative
 
Derivative
 
 
 
Derivative
 
Derivative
 
 
Derivatives Designated as Hedging Instruments
 
 

 
 

 
 

 
 

 
 

 
 

Coal
 
$
2,342

 
$
(805
)
 
 

 
$
942

 
$
(2,146
)
 
 

 
 


 


 
 
 


 


 
 

Derivatives Not Designated as Hedging Instruments
 
 

 
 

 
 

 
 

 
 

 
 

Heating oil -- diesel purchases
 
532

 
—

 
 

 
5,354

 
—

 
 

Coal held for trading purposes, exchange traded swaps and futures
 
10,329

 
(10,701
)
 
 

 
44,088

 
(45,221
)
 
 

Coal -- risk management
 
5,672

 
(19,579
)
 
 

 
5,139

 
(9,892
)
 
 

Natural gas
 
4

 
(4
)
 
 
 
27

 
—

 
 
Total
 
$
16,537

 
(30,284
)
 
 

 
$
54,608

 
$
(55,113
)
 
 

Total derivatives
 
$
18,879

 
$
(31,089
)
 
 

 
$
55,550

 
$
(57,259
)
 
 

Effect of counterparty netting
 
(17,801
)
 
17,801

 
 

 
(50,042
)
 
50,042

 
 

Net derivatives as classified in the balance sheets
 
$
1,078

 
$
(13,288
)
 
$
(12,210
)
 
$
5,508

 
$
(7,217
)
 
$
(1,709
)
 
 
 
 
 
December 31, 2018
 
December 31, 2017
Net derivatives as reflected on the balance sheets
 
 
 
 

 
 

Heating oil
 
Other current assets
 
$
532

 
$
5,354

Coal
 
Other current assets
 
546

 
154

 
 
Accrued expenses and other current liabilities
 
(13,288
)
 
(7,217
)
 
 
 
 
$
(12,210
)
 
$
(1,709
)
Effects Of Derivatives On Measures Of Financial Performance
The effects of derivatives on measures of financial performance are as follows: 

Derivatives used in Cash Flow Hedging Relationships (in thousands)
For the noted periods,
 
 
Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)
 
 
Successor
Predecessor
 
 
Year Ended December 31, 2018
 
Year Ended December 31, 2017
 
October 2 through December 31, 2016
January 1 through October 1, 2016
Coal sales
(1) 
$
(7,517
)
 
$
(2,127
)
 
$
—

(672
)
Coal purchases
(2) 
1,348

 
942

 
—

536

 
 
$
(6,169
)
 
$
(1,185
)
 
$
—

$
(136
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Gains (Losses) Reclassified from Other Comprehensive Income into Income
(Effective Portion)
 
 
Successor
Predecessor

 
 
Year Ended December 31, 2018
 
Year Ended December 31, 2017
 
October 2 through December 31, 2016
January 1 through October 1, 2016
Coal sales
 
$
(10,912
)
 
$
—

 
$
—

$
1,634

Coal purchases
 
2,707

 
—

 
—

(1,237
)
 
 
$
(8,205
)
 
$
—

 
$
—

$
397

 
No ineffectiveness or amounts excluded from effectiveness testing relating to the Company’s cash flow hedging relationships were recognized in the results of operations in the respective periods. 


Derivatives Not Designated as Hedging Instruments (in thousands)
For the noted periods,
 
 
Gain (Loss) Recognized
 
 
Successor
Predecessor

 
 
Year Ended December 31, 2018
 
Year Ended December 31, 2017
 
October 2 through December 31, 2016
January 1 through October 1, 2016
Coal trading— realized and unrealized
(3) 
$
135

 
$
(2,047
)
 
$
(7
)
$
(891
)
Coal risk management— unrealized
(3) 
(9,530
)
 
(4,648
)
 
(408
)
(1,662
)
Natural gas trading — realized and unrealized
(3) 
277

 
(527
)
 
19

(303
)
Change in fair value of coal derivatives and coal trading activities, net total
 
$
(9,118
)
 
$
(7,222
)
 
$
(396
)
$
(2,856
)
 
 
 
 
 
 
 
 
Coal risk management — realized
(4) 
$
(8,734
)
 
$
—

 
$
116

$
(476
)
Heating oil — diesel purchases
(4) 
$
(505
)
 
$
(1,057
)
 
$
827

$
826

Foreign currency
(4) 
$
—

 
$
—

 
$
(9
)
$
(451
)


Location in income statement:
(1) — Revenues
(2) — Cost of sales
(3) — Change in fair value of coal derivatives and coal trading activities, net
(4) — Other operating income, net