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Quarterly Selected Financial Data (unaudited)
12 Months Ended
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Selected Financial Data (unaudited)
Quarterly Selected Financial Data (unaudited)

Year Ended
December 31, 2015
March 31
 
June 30
 
September 30
 
December 31
 
 
(a)
 
(a)
 
(a)
 
(a)
 
 
(In thousands, except per share data)
 
 
 
 
 
 
 
 
 
Revenues
$
677,005

 
$
644,462

 
$
688,544

 
563,249

Gross profit (loss)
$
14,256

 
$
(16,507
)
 
$
47,275

 
(44,964
)
Asset impairment and mine closure costs
$

 
$
19,146

 
$
2,120,292

 
488,865

Loss from operations
$
(19,712
)
 
$
(69,546
)
 
$
(2,236,772
)
 
$
(539,033
)
Net loss
$
(113,195
)
 
$
(168,103
)
 
$
(1,999,476
)
 
$
(632,368
)
Diluted loss per common share
$
(5.32
)
 
$
(7.93
)
 
$
(93.91
)
 
$
(29.70
)

Year Ended
December 31, 2014
March 31
 
June 30
 
September 30
 
December 31
 
 
(a)
 
(a) (b)
 
(a) (b)
 
(a) (b)
 
 
(In thousands, except per share data)
 
 
 
 
 
 
 
 
 
Revenues
$
735,971

 
$
713,776

 
$
742,180

 
$
745,192

Gross profit (loss)
$
(49,842
)
 
$
(6,350
)
 
$
(5,851
)
 
$
32,264

Asset impairment and mine closure costs
$

 
$
1,512

 
$
5,060

 
$
17,541

Loss from operations
$
(73,123
)
 
$
(35,805
)
 
$
(35,300
)
 
$
(5,303
)
Net loss
$
(124,140
)
 
$
(96,860
)
 
$
(97,218
)
 
$
(240,135
)
Diluted loss per common share
$
(5.85
)
 
$
(4.57
)
 
$
(4.58
)
 
$
(11.31
)


(a) Challenging coal markets resulted in impairment charges relating to mining and other operations, investments in equity method subsidiaries and prepaid mining royalties in 2015 and 2014. See further discussion in Note 5, "Impairment Charges and Mine Closure Costs " and Note 10, " Equity Method Investments and Membership Interests in Joint Ventures."

(b) The Company determined that it would not realize the benefit from federal and state net operating losses it generated in 2014, based on projections of future taxable income, and as a result, recorded a valuation allowance against net operating losses of $23.8. million, $18.3 million, $15.8 million and $807.2 million in the second, third and fourth quarters of 2014, respectively.