Condensed Consolidating Financial Information (Schedule Of Condensed Consolidated Balance Sheets) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets	$ 217,664	$ 238,172
Property and equipment	3,376,805	3,067,845
Assets of midstream operations		27,178
Investment in subsidiaries (equity method)	21,725	83,341
Other assets	147,280	95,798
Total assets	3,763,474	3,512,334
Current liabilities	415,638	463,100
Long-term liabilities	2,230,042	1,988,395
Liabilities of midstream operations		1,431
Stockholders' equity	1,117,794	1,059,408
Total liabilities and equity	3,763,474	3,512,334
Quicksilver Resources Inc. [Member]
Current assets	280,905	295,697
Property and equipment	2,677,287	2,416,138
Assets of midstream operations
Investment in subsidiaries (equity method)	273,362	369,608
Other assets	358,876	339,227
Total assets	3,590,430	3,420,670
Current liabilities	465,245	496,852
Long-term liabilities	2,007,391	1,864,410
Liabilities of midstream operations
Stockholders' equity	1,117,794	1,059,408
Total liabilities and equity	3,590,430	3,420,670
Restricted Guarantor Subsidiaries [Member]
Current assets	87,401	86,582
Property and equipment	97,863	68,390
Assets of midstream operations		27,178
Investment in subsidiaries (equity method)
Other assets
Total assets	185,264	182,150
Current liabilities	110,573	106,627
Long-term liabilities	21,871	20,346
Liabilities of midstream operations		1,431
Stockholders' equity	52,820	53,746
Total liabilities and equity	185,264	182,150
Restricted Non-Guarantor Subsidiaries [Member]
Current assets	46,836	49,424
Property and equipment	601,655	583,317
Assets of midstream operations
Investment in subsidiaries (equity method)
Other assets	32,024	191
Total assets	680,515	632,932
Current liabilities	37,298	53,152
Long-term liabilities	444,400	347,259
Liabilities of midstream operations
Stockholders' equity	198,817	232,521
Total liabilities and equity	680,515	632,932
Consolidating Eliminations [Member]
Current assets	(197,478)	(193,531)
Property and equipment
Assets of midstream operations
Investment in subsidiaries (equity method)	(251,637)	(286,267)
Other assets	(243,620)	(243,620)
Total assets	(692,735)	(723,418)
Current liabilities	(197,478)	(193,531)
Long-term liabilities	(243,620)	(243,620)
Liabilities of midstream operations
Stockholders' equity	(251,637)	(286,267)
Total liabilities and equity	$ (692,735)	$ (723,418)