Quicksilver Stockholders' Equity (Stock Option Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at beginning of period, Shares	4,979,980
Granted, Shares	58,576
Expired, Shares	(6,555)
Outstanding at end of period, Shares	5,032,001
Outstanding at beginning of period, Wtd Avg Exercise Price	$ 10.23
Exercisable at end of period, Shares	3,780,023
Granted, Wtd Avg Exercise Price	$ 2.93
Expired, Wtd Avg Exercise Price	$ 9.33
Outstanding at end of period, Wtd Avg Exercise Price	$ 10.15
Exercisable at end of period, Wtd Avg Exercise Price	$ 10.86
Outstanding at end of period, Wtd Avg Remaining Contractual Life, Years	6 years 2 months 4 days
Exercisable at end of period, Wtd Avg Remaining Contractual Life, Years	6 years 9 months 5 days
Outstanding at end of period, Aggregate Intrinsic Value	$ 0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition	June 2015