Earnings Per Share (Reconciliation Of Components Used To Compute Basic And Diluted Net Income Per Common Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income (loss) attributable to Quicksilver	$ 23,757		$ 10,577		$ (71,171)		$ 193,397
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	772	[1]	312	[1]	0	[1]	5,111	[1]
Income (loss) available to shareholders	$ 22,985		$ 10,265		$ (71,171)		$ 188,286
Weighted Average Number of Shares Outstanding, Basic	173,936,000		171,682,000		173,783,000		171,403,000
Share-based compensation awards	216,000	[2]	311,000	[2]	0	[2]	170,000	[2]
Weighted Average Number of Shares Outstanding, Diluted	174,152,000		171,993,000		173,783,000		171,573,000
Earnings (loss) per common share - basic	$ 0.13		$ 0.06		$ (0.41)		$ 1.10
Earnings (loss) per common share - diluted	$ 0.13	[2]	$ 0.06	[2]	$ (0.41)	[2]	$ 1.10	[2]
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from the diluted share calculation	6,600,000		6,200,000		6,600,000		5,500,000
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from the diluted share calculation	1,200,000		200,000		800,000		200,000

[1] Restricted share awards that contain nonforfeitable rights to dividends are participating securities and, therefore, should be included in computing earnings per share using the two-class method. Participating securities, however, do not participate in undistributed net losses because there is no contractual obligation to do so.

[2] For the three months ended September 30, 2014, 6.6 million shares associated with our stock options and 1.2 million shares associated with our unvested RSUs were antidilutive and, therefore, excluded from the diluted share calculations. For the three months ended September 30, 2013, 6.2 million shares associated with our stock options and 0.2 million shares associated with our unvested RSUs were antidilutive and, therefore, excluded from the diluted share calculations. For the nine months ended September 30, 2014, 6.6 million shares associated with our stock options and 0.8 million shares associated with our unvested RSUs were antidilutive and, therefore, excluded from the diluted share calculations. For the nine months ended September 30, 2013, 5.5 million shares associated with our stock options and 0.2 million shares associated with our unvested RSUs were antidilutive and, therefore, excluded from the diluted share calculations.