Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities
Net loss	$ (434,010)	$ (2,280,774)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation, depletion and amortization	191,581	306,211
Amortization of acquired sales contracts, net	(728)	(7,028)
Amortization relating to financing activities	12,800	18,960
Prepaid royalties expensed	4,791	6,661
Employee stock-based compensation expense	2,096	4,459
Asset impairment and non-cash mine closure costs	119,194	2,136,610
Non-cash bankruptcy reorganization items	(16,634)	0
Losses from disposed operations resulting from Patriot Coal bankruptcy	0	149,314
Expenses related to proposed debt restructuring	2,213	11,498
Gains on disposals and divestitures, net	(6,628)	(1,191)
Deferred income taxes	(419)	(347,180)
Changes in:
Receivables	(42,787)	(3,165)
Inventories	34,604	(48,848)
Accounts payable, accrued expenses and other current liabilities	90,920	(19,338)
Income taxes, net	(4,217)	(4,303)
Other	15,990	(1,568)
Cash used in operating activities	(31,234)	(79,682)
Investing activities
Capital expenditures	(82,434)	(109,250)
Additions to prepaid royalties	(305)	(5,808)
Proceeds from (consideration paid for) disposals and divestitures	(2,921)	1,020
Purchases of marketable securities	(98,750)	(203,094)
Proceeds from sale or maturity of marketable securities and other investments	187,006	248,362
Investments in and advances to affiliates	(3,440)	(7,944)
Withdrawals (deposits) of restricted cash	15,979	(44,732)
Cash provided by (used in) investing activities	15,135	(121,446)
Financing activities
Payments on term loan	0	(14,625)
Net payments on other debt	(12,083)	(12,192)
Expenses related to proposed debt restructuring	(2,213)	(11,498)
Debt financing costs	(20,181)	0
Cash used in financing activities	(34,477)	(38,315)
Decrease in cash and cash equivalents	(50,576)	(239,443)
Cash and cash equivalents, beginning of period	450,781	734,231
Cash and cash equivalents, end of period	$ 400,205	$ 494,788