Condensed Consolidating Financial Information (Schedule of Condensed Consolidated Statements of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	$ (4,983)	$ (81,103)
Purchases of property, plant and equipment	(111,444)	(78,549)
Investment in subsidiary	0
Proceeds from sale of properties and equipment	1,942	2,994
Payments to acquire marketable securities	(55,890)	(142,823)
Proceeds from Sale and Maturity of Marketable Securities	222,025	13,178
Net cash used by investing activities	152,220	300,515
Issuance of debt	243,184	1,173,306
Repayments of debt	(193,689)	(1,308,382)
Debt issuance costs	(225)	(25,868)
Intercompany note	0	0
Intercompany financing	0
Contribution received	0
Distribution of Fortune Creek Partnership funds	(37,113)	(8,079)
Purchase of treasury stock	(2,388)	(1,472)
Net cash flow provided (used) by financing activities	9,769	(170,495)
Effect of exchange rates on cash	2,216	2,610
Net increase (decrease) in cash and equivalents	159,222	51,527
Cash and cash equivalents at beginning of period	89,103	4,951
Cash and cash equivalents at end of period	248,325	56,478
Quicksilver Resources Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	(39,474)	(113,029)
Purchases of property, plant and equipment	(88,119)	(53,291)
Investment in subsidiary	(1,246)
Proceeds from sale of properties and equipment	1,445	2,977
Payments to acquire marketable securities	(55,890)	(142,823)
Proceeds from Sale and Maturity of Marketable Securities	222,025	13,178
Net cash used by investing activities	173,802	325,756
Issuance of debt	174,000	1,170,266
Repayments of debt	(138,651)	(1,157,969)
Debt issuance costs	(225)	(25,868)
Intercompany note	(22,558)	(147,103)
Intercompany financing	0
Contribution received	0
Distribution of Fortune Creek Partnership funds	0	0
Purchase of treasury stock	(2,388)	(1,472)
Net cash flow provided (used) by financing activities	10,178	(162,146)
Effect of exchange rates on cash	0	0
Net increase (decrease) in cash and equivalents	144,506	50,581
Cash and cash equivalents at beginning of period	83,893	4,618
Cash and cash equivalents at end of period	228,399	55,199
Restricted Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	(688)	(19)
Purchases of property, plant and equipment	(57)	19
Investment in subsidiary	0
Proceeds from sale of properties and equipment	0	0
Payments to acquire marketable securities	0	0
Proceeds from Sale and Maturity of Marketable Securities	0	0
Net cash used by investing activities	(57)	19
Issuance of debt	0	0
Repayments of debt	0	0
Debt issuance costs	0	0
Intercompany note	0	0
Intercompany financing	745
Contribution received	0
Distribution of Fortune Creek Partnership funds	0	0
Purchase of treasury stock	0	0
Net cash flow provided (used) by financing activities	745	0
Effect of exchange rates on cash	0	0
Net increase (decrease) in cash and equivalents	0	0
Cash and cash equivalents at beginning of period	0	0
Cash and cash equivalents at end of period	0	0
Restricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	28,843	25,517
Purchases of property, plant and equipment	(23,247)	(24,752)
Investment in subsidiary	(26,395)
Proceeds from sale of properties and equipment	497	17
Payments to acquire marketable securities	0	0
Proceeds from Sale and Maturity of Marketable Securities	0	0
Net cash used by investing activities	(49,145)	(24,735)
Issuance of debt	69,184	3,040
Repayments of debt	(55,038)	(150,413)
Debt issuance costs	0	0
Intercompany note	22,558	147,103
Intercompany financing	501
Contribution received	0
Distribution of Fortune Creek Partnership funds	0	0
Purchase of treasury stock	0	0
Net cash flow provided (used) by financing activities	37,205	(270)
Effect of exchange rates on cash	(2,718)	(512)
Net increase (decrease) in cash and equivalents	14,185	0
Cash and cash equivalents at beginning of period	4,135	0
Cash and cash equivalents at end of period	18,320	0
Restricted Subsidiary Eliminations [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	0
Purchases of property, plant and equipment	0
Investment in subsidiary	1,246
Proceeds from sale of properties and equipment	0
Payments to acquire marketable securities	0
Proceeds from Sale and Maturity of Marketable Securities	0
Net cash used by investing activities	1,246
Issuance of debt	0
Repayments of debt	0
Debt issuance costs	0
Intercompany note	0
Intercompany financing	(1,246)
Contribution received	0
Distribution of Fortune Creek Partnership funds	0
Purchase of treasury stock	0
Net cash flow provided (used) by financing activities	(1,246)
Effect of exchange rates on cash	0
Net increase (decrease) in cash and equivalents	0
Cash and cash equivalents at beginning of period	0
Cash and cash equivalents at end of period	0
Quicksilver And Restricted Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	(11,319)	(87,531)
Purchases of property, plant and equipment	(111,423)	(78,024)
Investment in subsidiary	(26,395)
Proceeds from sale of properties and equipment	1,942	2,994
Payments to acquire marketable securities	(55,890)	(142,823)
Proceeds from Sale and Maturity of Marketable Securities	222,025	13,178
Net cash used by investing activities	125,846	301,040
Issuance of debt	243,184	1,173,306
Repayments of debt	(193,689)	(1,308,382)
Debt issuance costs	(225)	(25,868)
Intercompany note	0	0
Intercompany financing	0
Contribution received	0
Distribution of Fortune Creek Partnership funds	0	0
Purchase of treasury stock	(2,388)	(1,472)
Net cash flow provided (used) by financing activities	46,882	(162,416)
Effect of exchange rates on cash	(2,718)	(512)
Net increase (decrease) in cash and equivalents	158,691	50,581
Cash and cash equivalents at beginning of period	88,028	4,618
Cash and cash equivalents at end of period	246,719	55,199
Unrestricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	0	0
Purchases of property, plant and equipment	0	0
Investment in subsidiary	(26,395)
Proceeds from sale of properties and equipment	0	0
Payments to acquire marketable securities	0	0
Proceeds from Sale and Maturity of Marketable Securities	0	0
Net cash used by investing activities	(26,395)	0
Issuance of debt	0	0
Repayments of debt	0	0
Debt issuance costs	0	0
Intercompany note	0	0
Intercompany financing	0
Contribution received	26,395
Distribution of Fortune Creek Partnership funds	0	0
Purchase of treasury stock	0	0
Net cash flow provided (used) by financing activities	26,395	0
Effect of exchange rates on cash	0	0
Net increase (decrease) in cash and equivalents	0	0
Cash and cash equivalents at beginning of period	22	0
Cash and cash equivalents at end of period	22	0
Fortune Creek [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	6,336	6,428
Purchases of property, plant and equipment	(21)	(525)
Investment in subsidiary	0
Proceeds from sale of properties and equipment	0	0
Payments to acquire marketable securities	0	0
Proceeds from Sale and Maturity of Marketable Securities	0	0
Net cash used by investing activities	(21)	(525)
Issuance of debt	0	0
Repayments of debt	0	0
Debt issuance costs	0	0
Intercompany note	0	0
Intercompany financing	0
Contribution received	26,395
Distribution of Fortune Creek Partnership funds	(37,113)	(8,079)
Purchase of treasury stock	0	0
Net cash flow provided (used) by financing activities	(10,718)	(8,079)
Effect of exchange rates on cash	4,934	3,122
Net increase (decrease) in cash and equivalents	531	946
Cash and cash equivalents at beginning of period	1,053	333
Cash and cash equivalents at end of period	1,584	1,279
Consolidating Eliminations [Member]
Schedule of Equity Method Investments [Line Items]
Net cash flow provided (used) by operating activities	0
Purchases of property, plant and equipment	0
Investment in subsidiary	52,790
Proceeds from sale of properties and equipment	0
Payments to acquire marketable securities	0
Proceeds from Sale and Maturity of Marketable Securities	0
Net cash used by investing activities	52,790
Issuance of debt	0
Repayments of debt	0
Debt issuance costs	0
Contribution received	(52,790)
Distribution of Fortune Creek Partnership funds	0
Purchase of treasury stock	0
Net cash flow provided (used) by financing activities	(52,790)
Effect of exchange rates on cash	0
Net increase (decrease) in cash and equivalents	0
Cash and cash equivalents at beginning of period	0
Cash and cash equivalents at end of period	0
Tokyo Gas [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0	463,418
Tokyo Gas [Member] | Quicksilver Resources Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		463,418
Tokyo Gas [Member] | Restricted Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		0
Tokyo Gas [Member] | Restricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		0
Tokyo Gas [Member] | Quicksilver And Restricted Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		463,418
Tokyo Gas [Member] | Unrestricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		0
Tokyo Gas [Member] | Fortune Creek [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		0
Sandwash Basin [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	95,587	0
Sandwash Basin [Member] | Quicksilver Resources Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	95,587
Sandwash Basin [Member] | Restricted Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0
Sandwash Basin [Member] | Restricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0
Sandwash Basin [Member] | Restricted Subsidiary Eliminations [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0
Sandwash Basin [Member] | Quicksilver And Restricted Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	95,587
Sandwash Basin [Member] | Unrestricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0
Sandwash Basin [Member] | Fortune Creek [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0
Sandwash Basin [Member] | Consolidating Eliminations [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0
Synergy [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates	0	42,297
Synergy [Member] | Quicksilver Resources Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		42,297
Synergy [Member] | Restricted Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		0
Synergy [Member] | Restricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		0
Synergy [Member] | Quicksilver And Restricted Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		42,297
Synergy [Member] | Unrestricted Non-Guarantor Subsidiaries [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		0
Synergy [Member] | Fortune Creek [Member]
Schedule of Equity Method Investments [Line Items]
Proceeds from Divestiture of Interest in Subsidiaries and Affiliates		$ 0