Supplemental Quarterly Info (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

SUPPLEMENTAL QUARTER INFORMATION: [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

Supplemental Quarterly Information (unaudited):

(Dollars in thousands, except per share data)

	Three Months Ended
	March 31,		June 30,		September 30,		December 31,
	2011		2011		2011		2011
Sales	$	1,405,293	$	1,503,435	$	1,439,930	$	1,383,431
Freight Revenue	$	36,868	$	59,572	$	59,871	$	75,225
Cost of Goods Sold and Other Operating Charges (including Gas Royalty Interests' Costs and Purchased Gas Costs)	$	831,192	$	943,541	$	895,075	$	894,543
Freight Expense	$	36,679	$	59,572	$	59,871	$	75,225
Net Income	$	192,149	$	77,384	$	167,329	$	195,635
Net Income Attributable to CONSOL Energy Inc Shareholders	$	192,149	$	77,384	$	167,329	$	195,635
Total Earnings per Share
Basic	$	0.85	$	0.34	$	0.74	$	0.86
Diluted	$	0.84	$	0.34	$	0.73	$	0.85
Weighted Average Shares Outstanding
Basic	226,350,594		226,647,752		226,744,011		226,971,597
Diluted	228,814,838		229,138,024		229,163,537		229,314,370

	Three Months Ended
	March 31,		June 30,		September 30,		December 31,
	2010		2010		2010		2010
Sales	$	1,186,869	$	1,236,007	$	1,282,154	$	1,307,769
Freight Revenue	$	31,200	$	28,075	$	37,269	$	29,171
Cost of Goods Sold and Other Operating Charges (including Gas Royalty Interests' Costs and Purchased Gas Costs)	$	781,367	$	831,638	$	870,560	$	842,273
Freight Expense	$	31,200	$	28,075	$	37,269	$	29,000
Net Income	$	107,882	$	70,900	$	75,383	$	104,461
Net Income Attributable to CONSOL Energy Inc Shareholders	$	100,269	$	66,668	$	75,383	$	104,461
Total Earnings per Share
Basic	$	0.55	$	0.30	$	0.33	$	0.46
Diluted	$	0.54	$	0.29	$	0.33	$	0.46
Weighted Average Shares Outstanding
Basic	181,726,480		225,715,539		225,781,539		225,854,413
Diluted	184,348,982		228,081,103		228,092,299		228,169,569