CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Western Coal Corporation	Sep. 30, 2010 HighMount Exploration & Production Alabama, LLC
OPERATING ACTIVITIES
Net income	$ 265,392	$ 293,929
Loss from discontinued operations		1,848
Income from continuing operations	265,392	295,777
Adjustments to reconcile income from continuing operations to net cash flows provided by (used in) operating activities:
Depreciation and depletion	180,830	71,959
Deferred income taxes	(19,138)	85,703
Gain on investment in Western Coal Corp	(20,553)
Other	29,098	(12,553)
Decrease (increase) in current assets, net of effect of business acquisitions:
Receivables	30,655	(91,783)
Inventories	(1,560)	12,580
Other current assets	19,496	12,839
Increase in current liabilities, net of effect of business acquisitions:
Accounts payable	24,645	14,966
Accrued expenses and other current liabilities	764	33,584
Cash flows provided by operating activities	509,629	423,072
INVESTING ACTIVITIES
Additions to property, plant and equipment	(293,377)	(80,230)
Acquisition, net of cash acquired			(2,432,693)	(209,964)
Proceeds from sales of investments	27,325
Other	814	(4,105)
Cash flows used in investing activities	(2,697,931)	(294,299)
FINANCING ACTIVITIES
Proceeds from issuance of debt	2,350,000
Borrowings under revolving credit agreement	41,461
Repayments on revolving credit agreement	(41,461)
Retirements of debt	(165,024)	(19,711)
Dividends paid	(22,236)	(18,654)
Purchases of stock under stock repurchase program		(65,438)
Debt issuance costs	(80,027)
Other	(1,197)	30,043
Cash flows provided by (used in) financing activities	2,081,516	(73,760)
Cash flows provided by (used in) continuing operations	(106,786)	55,013
CASH FLOWS FROM DISCONTINUED OPERATIONS
Cash flows used in operating activities		(6,146)
Cash flows provided by investing activities		3,453
Cash flows used in discontinued operations		(2,693)
Effect of foreign exchange rates on cash	(2,013)
Net increase (decrease) in cash and cash equivalents	(108,799)	52,320
Cash and cash equivalents at beginning of period	293,410	165,279
Add: Cash and cash equivalents of discontinued operations at beginning of period	535	1,254
Net increase (decrease) in cash and cash equivalents	(108,799)	52,320
Less: Cash and cash equivalents of discontinued operations at end of period		434
Cash and cash equivalents at end of period	185,146	218,419
Acquisition of Western Coal in 2011 and HighMount in 2010:
Fair value of assets acquired			5,681,133	217,607
Less: fair value of liabilities assumed			(1,934,931)	(7,643)
fair value of shares of common stock issued			(1,224,126)
fair value of stock options issued and warrants			(34,765)
gain on investment			(20,553)
cash acquired			(34,065)
Net cash paid			2,432,693	209,964
Non-cash transactions:
Financing of one-year property insurance premium		$ 18,947