Quarterly Selected Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

		Predecessor											Successor
Year Ended	December 31, 2016	March 31			June 30			September 30			October 1		October 2 through December 31, 2016
		(a) (b)			(a) (b)			(b)			(b)
(In thousands, except per share data)
Revenues		$	428,106		$	420,298		$	550,305		—		575,688
Gross profit (loss)		$	(53,325	)	$	(56,469	)	$	31,042		—		64,458
Asset impairment and mine closure costs		$	85,520		$	43,701		$	46		—		—
Income (loss) from operations		$	(158,412	)	$	(110,521	)	$	11,795		$	—	$	46,118
Reorganization items, net		$	(3,875	)	$	(21,271	)	$	(20,904	)	$	1,676,091	$	(759	)
Net income (loss)		$	(206,702	)	$	(175,887	)	$	(51,421	)	$	1,676,091	$	33,449
Diluted earnings (loss) per common share		$	(9.71	)	$	(8.26	)	$	(2.41	)	$	78.66	$	1.31

		Predecessor
Year Ended	December 31, 2015	March 31			June 30			September 30			December 31
					(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	)

(a) Challenging coal markets resulted in impairment charges relating to mining and other operations, investments in equity method subsidiaries and prepaid mining royalties in 2016 and 2015. See further discussion in Note 5, “Impairment Charges and Mine Closure Costs “ and Note 9, “Equity Method Investments and Membership Interests in Joint Ventures.”

(b) The Company filed for bankruptcy on January 11, 2016 and subsequently emerged on October 5, 2016. See further discussion in Note 3, “Emergence from Bankruptcy and Fresh Start Accounting.”