Segment Information (Tables)

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Schedule Of Operating Segment Results

	PRB			APP			WBIT			Other Operating Segments			Corporate, Other and Eliminations			Consolidated
	(in thousands)
Three Months Ended September 30, 2012
Revenues	$	406,719		$	436,409		$	217,963		$	26,527		$	—		$	1,087,618
Income (loss) from operations	38,873			88,695			40,828			(1,298		)	(31,138		)	135,960
Depreciation, depletion and amortization	43,944			61,596			17,881			2,594			823			126,838
Amortization of acquired sales contracts, net	(589		)	(3,711		)	—			207			—			(4,093		)
Mine closure and asset impairment costs	—			(1,801		)	(50		)	(210		)	(133		)	(2,194		)
Capital expenditures	5,620			77,772			13,510			3,640			1,353			101,895
Three Months Ended September 30, 2011
Revenues	$	394,012		$	611,403		$	168,795		$	24,463		$	—		$	1,198,673
Income (loss) from operations	38,632			63,350			24,653			(1,487		)	(48,892		)	76,256
Depreciation, depletion and amortization	42,676			73,420			19,125			3,674			652			139,547
Amortization of acquired sales contracts, net	3,802			(15,701		)	—			(832		)	33			(12,698		)

Mine closure and asset impairment costs	—			—			—		—			—			—
Capital expenditures	20,937			62,121			16,110		4,705			4,300			108,173
Nine Months Ended September 30, 2012
Revenues	$	1,130,408		$	1,409,776		$	562,074	$	88,549		$	—		$	3,190,807
Income (loss) from operations	94,163			(388,563		)	85,848		(3,757		)	(186,634		)	(398,943		)
Depreciation, depletion and amortization	122,298			210,789			54,935		9,704			1,946			399,672
Amortization of acquired sales contracts, net	(1,374		)	(21,658		)	—		471			—			(22,561		)
Mine closure and asset impairment costs	—			524,115			129		(437		)	(239		)	523,568
Total assets	2,234,941			3,846,136			676,057		454,118			2,724,602			9,935,854
Capital expenditures	15,399			222,177			42,761		8,153			15,478			303,968
Nine Months Ended September 30, 2011
Revenues	$	1,178,537		$	1,336,581		$	513,388	$	28,633		$	—		$	3,057,139
Income (loss) from operations	121,118			205,701			95,217		(1,412		)	(146,776		)	273,848
Depreciation, depletion and amortization	125,532			127,526			61,753		4,210			1,299			320,320
Amortization of acquired sales contracts, net	15,349			(19,907		)	—		(934		)	—			(5,492		)
Mine closure and asset impairment costs	—			7,316			—		—			—			7,316
Total assets	2,240,458			5,241,004			667,658		452,491			1,360,046			9,961,657
Capital expenditures	39,422			108,711			38,003		9,078			20,685			215,899

A

Reconciliation Statement Of Segment Income From Operations To Consolidated Income Before Income Taxes

A reconciliation of segment income from operations to consolidated income before income taxes follows:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2012			2011			2012			2011
	(in thousands)
Income (loss) from operations	$	135,960		$	76,256		$	(398,943	)	$	273,848
Interest expense	(75,710		)	(77,694		)	(229,210		)	(154,523		)
Interest income	1,459			840			3,568			2,341
Other nonoperating expense	—			(1,708		)	(19,042		)	(51,448		)
Income (loss) before income taxes	$	61,709		$	(2,306	)	$	(643,627	)	$	70,218